CN112436845B - Radio frequency L-PA Mid device, radio frequency transceiving system and communication equipment - Google Patents

Abstract

The present application provides a radio frequency L-PA Mid device, a radio frequency transceiver system, and a communication device, wherein the radio frequency L-PA Mid device is configured with a first low-frequency transmit port and at least one receive port for connecting to a radio frequency transceiver and for connecting The four round-emitting ports of the antenna, the radio frequency L‑PA Mid device includes: a transmitting circuit, which is connected to the first low-frequency transmitting port and is used for amplifying and processing multiple low-frequency signals received by the first low-frequency transmitting port; receiving circuits, respectively Connected with multiple receiving ports, used to amplify multiple low-frequency signals received by the round-emitting port and output to the receiving port; switch circuit, the switch circuit is respectively connected with the transmitting circuit, the receiving circuit, and the four round-emitting ports , which is used to select the radio frequency channel between the conduction transmitting circuit and any of the round-emitting ports, to support the alternate transmission of any low-frequency signal between the four round-emitting ports, which can improve the integration of the radio frequency device and save the area. .

Description

RF L-PA Mid devices, RF transceiver systems and communication equipment

technical field

The present application relates to the field of radio frequency technology, and in particular, to a radio frequency L-PA Mid device, a radio frequency transceiver system and communication equipment.

Background technique

With the development and progress of technology, 5G mobile communication technology has gradually begun to be applied to electronic devices. The communication frequency of 5G mobile communication technology is higher than that of 4G mobile communication technology. At present, major operators have proposed functional requirements for 5G NR signals to support Sounding Reference Signal SRS. In order to realize the SRS function of 5G NR low-band signals, the structure of the radio frequency devices is relatively complex and occupies a large area of the substrate. .

SUMMARY OF THE INVENTION

The embodiments of the present application provide a radio frequency L-PA Mid device, a radio frequency transceiver system, and a communication device, which can improve the integration degree of the radio frequency device and save area.

A radio frequency L-PA Mid device is configured with a first low frequency transmitting port and at least one receiving port for connecting a radio frequency transceiver and four rounding ports for connecting an antenna, the radio frequency L-PA Mid device comprising:

a transmitting circuit, connected to the first low-frequency transmitting port, and configured to amplify the plurality of low-frequency signals received by the first low-frequency transmitting port;

a receiving circuit, which is respectively connected with a plurality of receiving ports, and is used for amplifying the plurality of low-frequency signals received by the round-emitting ports and outputting them through the receiving ports;

a switch circuit, the switch circuit is respectively connected with the transmitting circuit, the receiving circuit, and the four round-emitting ports, and is used to select and conduct the radio frequency path between the transmitting circuit, the receiving circuit and any round-emitting port, respectively, In order to support the alternate transmission of any one of the low frequency signals among the four alternate transmission ports.

A radio frequency transceiver system, comprising: a first antenna, a second antenna, a third antenna, a fourth antenna, a radio frequency transceiver and the aforementioned radio frequency L-PA Mid device, wherein the first antenna, the second antenna, the The three antennas and the fourth antenna are respectively connected to the four round-emitting ports of the radio frequency L-PA Mid device in a one-to-one correspondence; the radio frequency transceiver is respectively connected to the transmitting port and the receiving port of the radio frequency L-PA Mid device. , so as to support alternate transmission of any one of the low-frequency signals among the first antenna, the second antenna, the third antenna, and the fourth antenna.

A communication device includes the above-mentioned radio frequency transceiver system.

The above-mentioned radio frequency L-PA Mid device, radio frequency transceiver system, and communication equipment include a transmitting circuit, a receiving circuit and a switching circuit, so that the radio frequency L-PA Mid device can support the radio transmission of low-frequency signals between the four radio transmission ports , and then support the SRS function of 1T4R of low-frequency signals (for example, N5, N8, N20, N28A), which can avoid the use of external switch modules to support the SRS function, which can improve the integration of the device and save area. The PCB area of about 13mm^2 is saved, which is beneficial to the miniaturization of the device. In addition, the logic control of the switch circuit, the laying of the power supply network, etc. are all provided by the RF L-PA Mid device itself, which will not affect other components of the RF PA Mid RF device, and can also reduce costs.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is one of the structural block diagrams of the radio frequency L-PA Mid device in one embodiment;

Fig. 2 is the second structural block diagram of the radio frequency L-PA Mid device in one embodiment;

Fig. 3 is the third structural block diagram of the radio frequency L-PA Mid device in one embodiment;

Fig. 4 is the fourth structural block diagram of the radio frequency L-PA Mid device in one embodiment;

Fig. 5 is the fifth structural block diagram of the radio frequency L-PA Mid device in one embodiment;

Fig. 6 is the sixth structural block diagram of the radio frequency L-PA Mid device in one embodiment;

Fig. 7 is the seventh structural block diagram of the radio frequency L-PA Mid device in one embodiment;

Fig. 8 is the eighth structural block diagram of the radio frequency L-PA Mid device in one embodiment;

Fig. 9 is the pin schematic diagram of the radio frequency L-PA Mid device in Fig. 7;

FIG. 10 is a schematic diagram of the packaging structure of the RF L-PA Mid device in FIG. 7;

11 is one of the structural block diagrams of a radio frequency transceiver system in an embodiment;

12 is the second structural block diagram of a radio frequency transceiver system in an embodiment;

13 is the third structural block diagram of a radio frequency transceiver system in one embodiment;

14 is the fourth structural block diagram of a radio frequency transceiver system in one embodiment;

15 is the fifth structural block diagram of a radio frequency transceiver system in one embodiment;

FIG. 16 is a sixth structural block diagram of a radio frequency transceiver system in an embodiment.

Detailed ways

In order to facilitate the understanding of the present application, and to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Numerous specific details are set forth in the following description to facilitate a thorough understanding of the present application, and preferred embodiments of the present application are set forth in the accompanying drawings. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the disclosure of this application is provided. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise. In the description of this application, "several" means at least one, such as one, two, etc., unless expressly and specifically defined otherwise.

The radio frequency L-PA Mid device involved in the embodiments of the present application can be applied to a communication device with a wireless communication function, and the communication device may be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing device connected to a wireless modem, And various forms of user equipment (User Equipment, UE) (for example, a mobile phone), a mobile station (Mobile Station, MS) and so on. For convenience of description, the devices mentioned above are collectively referred to as communication devices. Network devices may include base stations, access points, and the like.

The embodiment of the present application provides a radio frequency L-PA Mid device. The RF L-PA Mid device can be understood as a power amplifier module (Power Amplifier Modules including Duplexers WithLNA, L-PA Mid) with a built-in low noise amplifier. The RF L-PA Mid device can support the reception and transmission of multiple low-frequency signals in different frequency bands, and realize the control of reception switching, transmission switching control, and switching control between transmission and reception among multiple low-frequency signals. The plurality of low-band signals may include low-band signals of different frequency bands among 4G signals, 5G NR signals, or 6G signals. Exemplarily, the frequency bands of the multiple low frequency frequency signals may include at least B8, B12, B20, B26, N8, N5, and N20 frequency bands. In addition, the frequency bands of the plurality of low frequency signals may also include B28A, N28A, B28B, B13, and B29 frequency bands. Therefore, the radio frequency L-PA Mid device in the embodiments of the present application may also be referred to as a low frequency power amplifier module with a built-in low noise amplifier (Low BandPA Mid With LNA, LB L-PA Mid).

As shown in FIG. 1 , in one of the embodiments, the radio frequency L-PA Mid device can be understood as a package structure, and the radio frequency L-PA Mid device is configured with a first low frequency transmit port 4G LB RFIN and at least a radio frequency transceiver for connecting to the radio frequency transceiver. One receiving port LNA OUT and four rounding ports LB ANT, SRS1, SRS2, SRS3 for connecting the antenna. The receiving port LNA OUT, the first low-frequency transmitting port 4G LB RFIN and the rounding ports LB ANT, SRS1, SRS2, and SRS3 configured in this device can be understood as the radio frequency pin terminals of the radio frequency L-PA Mid device, which are used to communicate with each other. connection to external devices. Specifically, the receiving port LNA OUT and the first low-frequency transmitting port 4G LB RFIN can be used to connect with the radio frequency transceiver. The radio ports LBANT, SRS1, SRS2, and SRS3 can be used to connect to the antenna, which can output multiple low-frequency signals processed by the RF L-PA Mid device to the corresponding antenna, and can also transmit the signals received by the antenna to the RF L -PA Mid device.

Specifically, the radio frequency L-PA Mid device includes: a transmitting circuit 110 , a receiving circuit 120 and a switching circuit 130 . The input end of the transmitting circuit 110 is connected to the first low frequency transmitting port 4G LB RFIN, and the output end of the transmitting circuit 110 is connected to the switching circuit 130 . The transmitting circuit 110 can perform amplifying processing on a plurality of low frequency signals received by the first low frequency transmitting port 4G LB RFIN. Specifically, the transmitting circuit 110 may be provided with multiple radio frequency channels to support the transmission of multiple low frequency signals. Exemplarily, the low-frequency signal may include at least frequency bands B8, B12, B20, B26, N8, N5, and N20, and may also include frequency bands B28A, N28A, B28B, B13, and B29. Among them, the first low frequency transmission port 4G LB RFIN, the transmission circuit 110, the switch circuit 130, and any round transmission port (LB ANT, SRS1, SRS2 or SRS3) constitute the transmission path. Specifically, the first low frequency transmission port 4G LB RFIN, the transmitting circuit 110, the switching circuit 130, and the round-emitting port LB ANT form a transmitting path; the first low-frequency transmitting port 4G LB RFIN, the transmitting circuit 110, the switching circuit 130, and the rounding port SRS1 form another transmitting path together ; The first low frequency transmission port 4G LB RFIN, the transmission circuit 110, the switch circuit 130, and another transmission path formed by the round-shooting port SRS2; Another transmission channel formed by SRS3. That is, four transmission channels can be set for each low-frequency signal, so as to support multiple transmission control for each low-frequency signal in time division.

In the embodiment of this application, it should be noted that, for the radio frequency L-PA Mid device, the relationship between 5G NR and 4G LTE is shown in Table 1. As can be seen from Table 1, 4G LTE shares some frequency bands with 5G NR. Therefore, the physical channels of N5, N8, N20, N28A, and N28B share the transceiver channels with B5, B8, B20, B28A, and B28B, respectively.

Table 1 Basic information of 4G LTE and 5G NR

The receiving circuit 120 is respectively connected to the switching circuit 130 and the plurality of receiving ports LNAOUT, and can amplify the received low-frequency signals, that is, the receiving circuit 120 can support the reception of any of the aforementioned low-frequency signals. control. The receiving circuit 120 may also be provided with multiple radio frequency channels for transmitting low frequency signals. Exemplarily, corresponding radio frequency channels may be set for the B8, B12, B20, B26, N8, N5, and N20 frequency bands. It should be noted that, for frequency bands such as B8, B12, B20, B26, N8, N5, and N20, corresponding shared channels can also be set according to the frequency range of each frequency band. For example, B26 and N5 frequency bands can share the same RF channel, and B8 It can share the same RF channel with the N8 frequency band.

Among them, a receiving channel formed by any of the round-emitting ports ANT1, ANT2, ANT3 or ANT4, the switch circuit 130, the receiving circuit 120, and any receiving port LNA OUT, that is, a low-frequency signal can be set for each frequency band. A receive path to support the receive processing of multiple low-band signals.

The switch circuit 130 is respectively connected to the transmitting circuit 110, the receiving circuit 120, and the four round-emitting ports LB ANT, SRS1, SRS2, and SRS3, and is used to select and turn on the transmitting circuit 110 and any round-emitting port (LB ANT, SRS1, The radio frequency path between SRS2 or SRS3), that is, the transmission path of any low-frequency signal is turned on to support the alternate transmission of low-frequency signals between the four round-emitting ports LB ANT, SRS1, SRS2, and SRS3, thereby supporting 5G Sounding reference signal (Sounding Reference Signal, SRS) function of NR low frequency band. At the same time, the switch circuit 130 can also selectively conduct the receiving path of any low frequency signal.

The above-mentioned radio frequency L-PA Mid device includes a transmitting circuit 110, a receiving circuit 120 and a switching circuit 130, so that the radio frequency L-PA Mid device can support low-frequency signals in four round-emitting ports (LB ANT, SRS1, SRS2, SRS3) The round shot between them, and then supports the SRS function of 1T4R of 5G NR signals (for example, N5, N8, N20, N28), that is, the SRS function of 1T4R. Among them, the RF L-PA Mid device only supports single uplink transmission, that is, at the same time, only one of the four polling ports (LBANT, SRS1, SRS2, SRS3) can be selected to transmit SRS information in turn, and at the same time It can support the selective receiving control of any low-frequency signal, and can realize the switching control of receiving and transmitting in multiple low-frequency signals. By building the switch circuit 130 and four radio ports (LB ANT, SRS1, SRS2, SRS3) in the RF L-PA Mid device, the use of an external switch module to support the SRS function can be avoided, and the integration of the device can be improved. In addition, the area can be saved, for example, the PCB area of about 13 mm^2 can be saved, which is beneficial to the miniaturization of the device. In addition, the logic control of the switch circuit 130, the laying of the power supply network, etc. are all provided by the RF L-PA Mid device itself, which will not affect other components of the RF PAmid RF device, and can also reduce costs.

As shown in FIG. 2 , in one embodiment, the switch circuit 130 includes a first switch unit 131 and a second switch unit 132 . The first switch unit 131 includes a plurality of first ends and a second end, and the second switch unit 132 includes a first end and four second ends. The multiple first ends of the first switch unit 131 are respectively connected to the transmitting circuit 110 and the receiving circuit 120; the second end of the first switch unit 131 is connected to the first end of the second switch unit 132, and the second switch unit The four second ends of the 132 are respectively connected to the four round-shooting ports LB ANT, SRS1, SRS2, and SRS3 in a one-to-one correspondence.

Specifically, the first switch unit 131 may be an SPnT switch. Exemplarily, the first switch unit 131 may be an SP9T switch, and the second switch unit 132 may be an SP4T switch. In this embodiment of the present application, n may be set according to the number of multiple low-frequency signals and the internal structural characteristics of the transmitting circuit 110 and the receiving circuit 120 , which are not further limited here.

As shown in FIG. 3 , in one embodiment, the switch circuit 130 includes a multi-channel selection switch 133 . The multi-channel selection switch 133 includes a plurality of first terminals and four second terminals. That is, the multi-channel selection switch 133 can be understood as a single switch that integrates the second switch unit 132 into the first switch unit 131 . The multiple first terminals of the multi-channel selection switch 133 are respectively connected to the transmitting circuit 110 and the receiving circuit 120 respectively; the four second terminals of the multi-channel selection switch 133 are respectively connected to the four round-emitting ports.

Specifically, the multi-channel selection switch 133 may be a 4PnT switch. Exemplarily, the multi-channel selection switch 133 may be a 4P9T switch. In this embodiment of the present application, n may be set according to the number of multiple intermediate frequency signals, multiple low frequency frequency signals, and internal structural features of the transmitting circuit 110 and the receiving circuit 120, which are not further limited here.

Based on the radio frequency L-PA Mid device shown in FIG. 2 and FIG. 3, by setting the first switch unit 131 and the second switch unit 132 or the multi-channel selection switch 133, when the radio frequency L-PA Mid device needs to transmit a signal, it can Select and turn on any radio frequency channel of the transmitting circuit 110 and any of the rounding ports ANT1, ANT2, ANT3 or ANT4, that is, turn on any of the transmitting channels to support 5G NR signals (for example, N5, N8, N20 , N28) SRS function. When the radio frequency L-PA Mid device needs to receive a signal, it can choose to conduct the channel between any radio frequency channel in the receiving circuit 120 and any round-emitting port (LB ANT, SRS1, SRS2 or SRS3), that is, the channel between the channel Selectively receive at least one low frequency signal through any receiving channel.

At the same time, the multi-channel selection switch 133 in the radio frequency L-PA Mid device shown in FIG. 3 is less than the first switch unit 131 and the second switch unit 132 in the radio frequency L-PA Mid device shown in FIG. 2 . The use of one-stage switching unit can further reduce the insertion loss of any transmission path. Exemplarily, when the multi-channel selection switch 133 is a 4P9T switch, the first switch unit 131 is an SP9T switch, and the second switch unit 132 is an SP4T switch, for the transmission path of the N8 frequency band, the radio frequency L-PA shown in FIG. The Mid device can reduce the insertion loss by 0.5dB, and then can increase the output power of the low-frequency signal (such as the N8 frequency band) at the round-emitting port to reach the 26.0dBm required by the R&D standards issued by major operators.

As shown in FIG. 4 , in one embodiment, the transmitting circuit 110 includes a first power amplifier 111 , a third switching unit 112 and a plurality of first filtering units 113 . The input end of the first power amplifier 111 is connected to the first low frequency transmission port 4G LB RFIN, and the output end of the first power amplifier 111 is connected to a first end of the third switch unit 112 . Each second terminal of the third switch unit 112 is connected to the switch circuit 130 via a first filter unit 113 respectively. That is, each second end of the third switching unit 112 is correspondingly connected to one end of a first filtering unit 113 , and the other end of each first filtering unit 113 is correspondingly connected to the switching circuit 130 .

The first power amplifier 111 can perform power amplifying processing on a plurality of low-frequency signals received through the first low-frequency transmitting port 4G LB RFIN, and then the low-frequency signals processed by the first power amplifier 111 are passed through the third switching unit 112. It is transmitted to each first filtering unit 113 . The first filtering unit 113 is configured to perform filtering processing on the low frequency band signal, and the frequency band of the low frequency band signal output by each first filtering unit 113 is different. It can be understood that the filtering paths in the multiple transmitting paths are independent of each other and do not overlap with each other. The first filtering unit 113 may correspondingly include a filter that only allows low frequency signals of a preset frequency band to pass. Exemplarily, if the frequency bands of the multiple low-frequency signals can be eight different frequency bands, B12, B8 (N8), B20 (N20), B26 (N5), B13, B2A (B28A), B28B, and B29, they can be set accordingly. Eight first filtering units 113 (ie, eight filters) are used to implement filtering processing for eight low-frequency band signals. Correspondingly, the third switch unit 112 may be an SP8T switch, wherein the first end of the SP8T switch is connected to the output end of the first power amplifier 111 , and the eight second ends of the SP8T switch correspond one-to-one with the eight first filter Unit 113 is connected. After the filtering processing by the eight first filtering units 113, eight low-frequency signals of B12, B8 (N8), B20 (N20), B26 (N5), B13, B2A (B28A), B28B, and B29 can be output correspondingly. to the switch circuit 130 .

Wherein, the first low frequency transmitting port 4G LB RFIN, the third switching unit 112, and a first filtering unit 113 may constitute a radio frequency channel, wherein the frequency band of the low frequency signal output by the first filtering unit 113 corresponds to the radio frequency channel of this frequency band . Exemplarily, the radio frequency path where the first filtering unit 113 outputting the B8/N8 frequency band is located can be understood as the B8/N8 radio frequency path, and the radio frequency path where the first filtering unit 113 outputting the B20/N20 frequency band is located can be understood as the B20/N20 radio frequency. path. Further, the first low frequency transmit port 4G LB RFIN, the third switch unit 112, a first filter unit 113, the switch circuit 130 and any of the round transmit ports (LB ANT, SRS1 SRS2 or SRS3) constitute a transmit path.

Referring to FIG. 4 , specifically, the receiving circuit 120 includes at least one low noise amplifier 121 , a fourth switching unit 122 and a plurality of second filtering units 123 . The output end of each low noise amplifier 121 is correspondingly connected to a receiving port LNA OUT, the output end of each low noise amplifier 121 is correspondingly connected to a first end of the fourth switch unit 122 , and the multiple The two ends are respectively connected to one end of the plurality of second filter units 123 in a one-to-one correspondence, and the other end of the second filter units 123 is connected to the switch circuit 130 .

The second filtering units 123 are respectively used for filtering the received low-frequency signals, and the frequency bands of the low-frequency signals output by each of the second filtering units 123 are different. The second filtering unit 123 has the same function as the first filtering unit 113 , and details are not repeated here. Wherein, any one of the round-emitting ports ANT, the switch circuit 130 , the second filter unit 123 , the fourth switch unit 122 , the low noise amplifier 121 , and any one of the receive ports LNAOUT can form a receive path.

As shown in FIG. 5 and FIG. 6 , in one of the embodiments, the number of receiving ports is three, which can be denoted as LNAOUT1, LNA OUT2, and LNA OUT3, respectively, and the number of low-noise amplifiers 121 is two, which are denoted as the first A low noise amplifier 1211 and a second low noise amplifier 1212. When the number of the low noise amplifiers is two, the fourth switch unit 122 includes a first radio frequency switch 1221 and a second radio frequency switch 1222 . The first radio frequency switch 1221 and the second radio frequency switch 1222 may both be SP4T switches. The single terminal of the first RF switch 1221 is connected to the input terminal of the first low noise amplifier 1211 , and the second terminals of the first RF switch 1221 are respectively connected to the second filter units 123 in one-to-one correspondence. The plurality of second filtering units 123 connected to the four second ends of the first radio frequency switch 1221 may include a plurality of second filtering units 123 for filtering the four low frequency signals of B26 (N5), B8 (N8), B28A (N28A), and B28B. Four filters for filtering processing respectively. The single terminal of the second RF switch 1222 is connected to the input terminal of the second low noise amplifier 1212 , and the second terminals of the second RF switch 1222 are respectively connected to the second filter units 123 in one-to-one correspondence. Wherein, the plurality of second filtering units 123 connected to the four second ends of the second radio frequency switch 1222 may include four filters for filtering the four low-frequency signals of B12, B20 (N20), B13, and B29, respectively. a filter.

It should be noted that the four filters connected to the first radio frequency switch 1221 are used for filtering and processing the four low frequency signals in adjacent frequency bands, and the four filters connected to the second radio frequency switch 1222 are used for filtering The frequency bands of the four low-frequency signals processed are adjacent. It should be noted that, in the embodiment of the present application, the second filtering unit 123 connected to the first radio frequency switch 1221 and the second radio frequency switch 1222 is not further limited, and can be set according to actual needs.

Optionally, the fourth switch unit 122 may also be a DP8T switch. The two first terminals of the DP8T switch are respectively connected to the input terminals of the two low noise amplifiers 121 in a one-to-one correspondence, and the eight second terminals of the DP8T switch are respectively connected to the eight second filter units 123 in a one-to-one correspondence.

In the embodiment of the present application, the number and type of switches included in the fourth switch unit 122 are not further limited, and may be set according to the set number of the second filter unit 123 and the low noise amplifier 121 .

Referring to FIGS. 5 and 6 , the receiving circuit 120 further includes a fifth switch unit 124 and an attenuator 125 . The output end of the first low noise amplifier 1211 is connected to the first end of the fifth switch unit 124 , a second end of the fifth switch unit 124 is connected to a receiving port, and the other second end of the fifth switch unit 124 It is connected to another receiving port through the attenuator 125; the output end of the first low noise amplifier 1211 is connected to another receiving port.

Specifically, the fifth switch unit 124 may be an SPDT switch, wherein a single terminal of the SPDT switch is connected to the output terminal of the first low noise amplifier 1211, and a second terminal of the SPDT switch is connected to a receiving port of the radio frequency 3P3T switch, The other second end of the SPDT switch is connected to another receiving port through the attenuator 125 . The fifth switch unit 124 can be used to selectively turn on the direct connection path between the first low noise amplifier 1211 and a receiving port, and can also be used to selectively turn on the receiving path where the attenuator 125 is located.

In the radio frequency L-PA Mid device in this embodiment, an attenuator 125 is set between the output end of the first low-noise amplifier 1211 and the receiving port LNA OUT. If the received low-frequency signal is a high-power signal, it can be adjusted accordingly The attenuation coefficient of the attenuator 125 is to increase the attenuation of the low-frequency signal, so as to avoid the bad influence on the radio frequency L-PAMid device and/or the radio frequency transceiver due to excessive power.

In one of the embodiments, the first filtering unit 113 and the second filtering unit 123 may also be connected to the same terminal of the switch circuit 130 . Exemplarily, filters disposed on the transmit path and on the receive path for corresponding filtering processing B8 (N8) may be connected to the same terminal of the switch circuit 130, respectively. It should be noted that, in the embodiment of the present application, the number of filters connected to the same terminal of the switch circuit 130 and the frequency bands of the low-frequency signals used for filtering processing by the connected filters are not further limited. frequency range of the signal.

In one of the embodiments, the radio frequency L-PA Mid device further includes a sixth switch unit 126. The multiple first ends of the sixth switch unit 126 are connected to the multiple receive ports LNA OUT in a one-to-one correspondence. The plurality of second ends are connected to the output ends of the first low noise amplifier 1211 and the second low noise amplifier 1212 in a one-to-one correspondence.

In one embodiment, the plurality of second ends of the sixth switch unit 126 are connected to the output ends of the first low noise amplifier 1211 , the second low noise amplifier 1212 , and the attenuator 125 in a one-to-one correspondence.

By arranging the sixth switch unit 126 in the RF L-PA Mid device, the flexibility of the low-frequency signals output by the multiple receiving ports can be increased, that is, each receiving port can output low-frequency signals corresponding to any frequency band to the RF transceiver.

Based on the radio frequency L-PA Mid device shown in Figure 5, the transceiver control of any low frequency signal can be realized. Exemplarily, the implementation of the low frequency signal of the N8 frequency band is taken as an example for description.

The transmission path of the N8 frequency band is as follows:

The first low frequency transmit port 4G LB RFIN→the first power amplifier 111→the third switch unit 112→N8 TX path→the first filter unit 113→the contact 6 of the first switch unit 131→the contact 9 of the first switch unit 131 → a single terminal of the second switch unit 132 → a second terminal of the second switch unit 132 → a polling port LB ANT.

The receive path of the N8 frequency band is as follows:

Round shot port LB ANT→a second end of the second switch unit 132→single terminal of the second switch unit 132→contact 9 of the first switch unit 131→contact 6 of the first switch unit 131→second filter unit 123→N8 RX channel→first radio frequency switch 1221→first low noise amplifier 1211→fifth switch unit 124 (or fifth switch unit 124→attenuator 125)→sixth switch unit 126→reception port LNA OUT1→RF transceiver device.

Based on the radio frequency L-PA Mid device shown in Figure 6, the transceiver control of any low-frequency signal can be realized. Exemplarily, the implementation of the low frequency signal of the N8 frequency band is taken as an example for description.

The transmission path of the N8 frequency band is as follows:

The first low frequency transmit port 4G LB RFIN→the first power amplifier 111→the third switch unit 112→N8 TX channel→the first filter unit 113→the contact 6 of the multi-channel selection switch 133→the contact 9 of the multi-channel selection switch 133 → Round shot port LB ANT.

The receive path of the N8 frequency band is as follows:

Polling port LB ANT→contact 9 of multi-channel selection switch 133→contact 6 of multi-channel selection switch 133→second filter unit 123→N8 RX channel→first RF switch 1221→first low noise amplifier 1211→th The five switch units 124 (or the fifth switch unit 124→the attenuator 125)→the sixth switch unit 126→the receiving port→the radio frequency transceiver.

The transmission path of the low-frequency signal of the RF L-PA Mid device shown in Figure 6 is reduced by one switch corresponding to the transmission path of the RF L-PA Mid device shown in Figure 5, which can reduce the 0.5dB Insertion loss, which can increase the output power of the N41 frequency band at the round-emitting port to reach the 26.0dBm required by the R&D standards issued by major operators. In addition, it is still possible to reduce the link insertion loss on the receiving path, specifically, by 0.25dB, which can improve the sensitivity of the receiving link.

As shown in FIGS. 7-8 , in one embodiment, the radio frequency L-PA Mid device is further configured with a plurality of auxiliary transmit ports LB TXOUT1 , LB TXOUT2 , LB TXOUT3 , and LB TXOUT4 for connecting with the external switching circuit 90 , multiple auxiliary transceiver ports LB_TRX1, LB_TRX2, LB_TRX3, LB_TRX4 and multiple auxiliary receiving ports LNA_AUX1, LNA_AUX2, LNA_AUX3, LNA_AUX4. Among them, a plurality of auxiliary transmission ports LB TXOUT1, LB TXOUT2, LB TXOUT3, LBTXOUT4 are respectively connected to the transmission circuit 110, a plurality of auxiliary transmission and reception ports LB_TRX1, LB_TRX2, LB_TRX3, LB_TRX4 are connected to the switch circuit 130; A plurality of auxiliary receiving ports LNA_AUX1, LNA_AUX2 , LNA_AUX3 and LNA_AUX4 are connected to the receiving circuit 120 .

In one embodiment, a plurality of auxiliary transmit ports LB TXOUT1 , LB TXOUT2 , LB TXOUT3 , and LBTXOUT4 can be used to transmit signals of B13, B28A (N28A), B28B, and B29 frequency bands. That is, the transmission and reception paths of the signals of the four frequency bands B13, B28A (N28A), B28B, and B29 also include the external switching circuit 90 . It should be noted that when the signals of the four frequency bands B13, B28A (N28A), B28B, and B29 are plugged in, the three frequency bands B13, B28A (N28A), B28B, and B29 can be omitted from the transmitting circuit 110 and the receiving circuit 120. filter. Meanwhile, each switch unit in the transmitting circuit 110, the receiving circuit 120 and the switching circuit 130 can also be adjusted adaptively. Exemplarily, part of the second ends of the third switching unit 112 of the transmitting circuit 110 are respectively connected to the first filtering units 113 in a one-to-one correspondence, and part of the second ends of the third switching unit 112 of the transmitting circuit 110 are respectively connected to a plurality of auxiliary transmitters. Ports LB TXOUT1, LB TXOUT2, LB TXOUT3, LB TXOUT4 are connected in one-to-one correspondence. Part of the first ends of the switch circuit 130 are respectively connected with the plurality of first filter units 113 and the plurality of second filter units 123 in one-to-one correspondence, and part of the first ends of the switch circuit 130 are respectively connected with the plurality of auxiliary transceiver ports LB_TRX1 , LB_TRX2 , and LB_TRX3 , LB_TRX4 one-to-one connection. Part of the second end of the fourth switch unit 122 is connected to the plurality of second filtering units 123 in one-to-one correspondence, and part of the second end of the fourth switch unit 122 is connected to the plurality of auxiliary receiving ports LNA_AUX1 , LNA_AUX2 , LNA_AUX3 , and LNA_AUX4 .

Based on the radio frequency L-PA Mid device shown in Figure 7, the transceiver control of any low-frequency signal can be realized. Exemplarily, the implementation of the low-frequency signal of the N28A frequency band is taken as an example for description.

The transmission path of the N28A frequency band is as follows:

The first low frequency transmit port 4G LB RFIN → the first power amplifier 111 → the third switch unit 112 → the N28ATX channel → the auxiliary transmit port LB TXOUT2 → the switching circuit 90 → the auxiliary transceiver port LB_TRX2 → the contact 2 of the first switch unit 131 → the first A single terminal of a switch unit 131 → a single terminal of the second switch unit 132 → a second terminal of the second switch unit 132 → a polling port LB ANT.

The receive path of the N28A band is as follows:

Polling port LB ANT→a second end of the second switch unit 132→single terminal of the second switch unit 132→contact 2 of the first switch unit 131→auxiliary transceiver port LB_TRX2→switching circuit 90→auxiliary receive port LNA_AUX2→ N28A TX path→third switch unit 112→first RF switch 1221→first low noise amplifier 1211→receiving port→RF transceiver.

In one embodiment, the radio frequency L-PA Mid device is further configured with a second low frequency transmit port 2G LBRFIN, a high frequency transmit port 2G HB IN and a high frequency output port 2G HB OUT, and the radio frequency L-PA Mid device further includes a second low frequency transmit port 2G LBRFIN, a high frequency transmit port 2G HB IN and a high frequency output port 2G HB OUT Two power amplifiers 140 and a third power amplifier 150 . The input end of the second power amplifier 140 is connected to the second low frequency transmission port 2G LB RFIN, and the output end of the second power amplifier 140 is connected to a first end of the switch circuit 130 for amplifying the received 2G low frequency signal Processing; among them, the low-band signals are 4G signals and 5G signals. The third power amplifier 150, the input end of the third power amplifier 150 is connected to the high-frequency transmit port 2G HB IN, and the output end of the second power amplifier 140 is connected to the high-frequency output port 2G HB OUT, for receiving 2G high-frequency The signal is amplified.

In the radio frequency L-PA Mid device in this embodiment, by setting the second power amplifier 140, the transmission control of the low frequency signal of the 2G signal can be realized. Wherein, the low-frequency signal of the 2G signal may include the 900M frequency band of the GSM standard, the 800M frequency band of the CDMA standard, and the like. By setting the third power amplifier 150, the transmission control of the high frequency band signal of the 2G signal can be realized, wherein the low frequency band signal of the 2G signal can include the 900M frequency band of GSM standard and the 800M frequency band of CDMA standard.

7-8, in one embodiment, the radio frequency L-PA Mid device is further configured with a coupling output port CPLOUT, and the radio frequency L-PA Mid device further includes a coupling circuit 170, which is provided between the switch circuit 130 and the The radio frequency path between the round-emitting ports is used for coupling the low frequency signal in the radio frequency path, so as to output the coupled signal through the coupling output port CPLOUT. The coupling circuit 170 may be coupled to the radio frequency path between the first switch unit 131 and the second switch unit 132 . Optionally, the coupling circuit 170 may be coupled to the radio frequency path between the multi-channel selection switch 133 and any of the round-robin ports (eg, LB ANT).

The coupled signal can be used to measure the forward coupling power and the reverse coupling power of the low frequency signal. Specifically, the coupling circuit 170 includes an input terminal, an output terminal and a coupling terminal. The input end of the coupling circuit 170 is coupled to the switch circuit 130, the output end of the coupling circuit 170 is coupled to the round-emitting port, and the coupling end is used for coupling the intermediate frequency signal received by the input end and outputting the coupled signal, wherein the coupling signal Including forward coupled signals and reverse coupled signals. Wherein, based on the forward coupling signal output by the coupling end, the forward power information of the low frequency signal can be detected; based on the reverse coupling signal output by the coupling end, the reverse power information of the low frequency signal can be detected correspondingly, and the The detection mode is defined as the reverse power detection mode.

In this embodiment, only one coupling output port CPLOUT is set on the radio frequency L-PA Mid device. Since low-frequency signals of multiple frequency bands are not transmitted at the same time, one coupling output port CPLOUT can also meet the communication requirements, and also reduces the number of radio frequency L- The complexity of the RF routing inside the PA Mid device can also improve the isolation performance of each routing in the RF L-PA Mid device.

In one of the embodiments, the radio frequency L-PA Mid device further includes a first control unit 181 and a second control unit 182 . The first control unit 181 is respectively connected to each switch unit and each power amplifier, for example, the first switch unit 131, the second switch unit 132, . . . , the eighth switch unit, the first power amplifier 111, the second power amplifier 140 The connection is used to control the on-off of each switch unit, and also used to control the working state of each power amplifier. The second control unit 182 can be connected to each low noise amplifier 121, and is used to adjust the gain coefficient of each low noise amplifier 121, thereby adjusting the link loss of the receiving path of each intermediate frequency signal and low frequency signal, and then can improve each intermediate frequency signal, Sensitivity of the receive path for low frequency signals.

The first control unit 181 and the second control unit 182 may be Mobile Industry Processor Interface (MIPI)-RF Front End Control Interface (RFFE) control units or RF Front End Control Interface (RF Front) End Control Interface, RFFE) control unit, which conforms to the control protocol of the RFFE bus. When the first control unit 181 and the second control unit 182 are MIPI-RFFE control units or RFFE control units, the radio frequency L-PA Mid device thereof is also configured with an input pin CLK of a clock signal, and an input of a unidirectional/bidirectional data signal. Or the bidirectional pin SDATAS, the power supply pin VDD, the reference voltage pin VIO, etc., to realize the control of the first power amplifier 111 , the second power amplifier 140 , each switch unit, and the low noise amplifier 121 .

It should be noted that, in the embodiment of the present application, the control logic of each switch unit matches the control logic of the first control unit 181. In the embodiment of the present application, the control logic of each switch unit, the first control unit 181, the second The specific type of the control unit 182 is not further limited.

Based on the radio frequency L-PA Mid device shown in Figure 7, each component can be integrated and packaged in the same package chip. As shown in Figure 9, each pin in the radio frequency L-PA Mid device (package chip) One-to-one correspondence with multiple ports configured by the RF L-PA Mid device. Through package integration, the package specification of the RF L-PA Mid device is shown in Figure 10, which can improve the integration level of the RF L-PA Mid device.

Embodiments of the present application further provide a radio frequency transceiver system. As shown in FIG. 11 , in one embodiment, the radio frequency transceiver system includes a first antenna ANT0, a second antenna ANT1, a third antenna ANT2, a fourth antenna ANT3, a radio frequency transceiver 20, and any of the above-mentioned FIGS. 1-6 The RF L-PA Mid device 10 in the embodiment. The first antenna ANT0, the second antenna ANT1, the third antenna ANT2, and the fourth antenna ANT3 are respectively connected to the four radio ports SRS1, SRS2, SRS3, and LB ANT of the radio frequency L-PA Mid device 10 in a one-to-one correspondence, that is, The first antenna ANT0 is connected to the polling port SRS1, the second antenna ANT1 is connected to the polling port SRS2, the third antenna ANT2 is connected to the polling port SRS3, and the fourth antenna ANT3 is connected to the polling port LB ANT. The radio frequency transceiver 20 is respectively connected to the first low frequency transmitting port 4G LB RFIN and the receiving port LNA OUT of the radio frequency L-PAMid device.

In one of the embodiments, the first antenna ANT0, the second antenna ANT1, the third antenna ANT2, and the fourth antenna ANT3 may be formed using any suitable type of antenna. For example, the first antenna ANT0, the second antenna ANT1, the third antenna ANT2, the fourth antenna ANT3 may include antennas with resonant elements formed from the following antenna structures: an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna At least one of a structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas can be used for different frequency bands and combinations of frequency bands. In the embodiments of the present application, the types of the first antenna ANT0, the second antenna ANT1, the third antenna ANT2, and the fourth antenna ANT3 are not further limited.

As shown in FIG. 12 , in one embodiment, the radio frequency transceiver system includes the radio frequency L-PA Mid device 10 as in any of the embodiments in FIGS. 7-8 . The radio frequency transceiver system further includes a switching circuit 90 . The switching circuit 90 is respectively connected with multiple auxiliary transmit ports LB TXOUT1, LB TXOUT2, LB TXOUT3, LB TXOUT4, multiple auxiliary transceiver ports LB_TRX1, LB_TRX2, LB_TRX3, LB_TRX4 and multiple auxiliary receive ports of the radio frequency L-PA Mid device 10. LNA_AUX1, LNA_AUX2, LNA_AUX3, LNA_AUX4 connections.

Based on the radio frequency transceiver system shown in FIG. 11 and FIG. 12 , the radio frequency L-PA Mid device 10 includes a transmitting circuit 110 , a receiving circuit 120 and a switching circuit 130 , so that the radio frequency L-PA Mid device 10 can support multiple low frequency bands The signal is radiated between the four antennas, thereby supporting the SRS function of 1T4R of 5G NR signals (for example, N5, N8, N20, N28A), that is, the SRS function of 1T4R, which can avoid the use of external RF PA Mid devices. The switch module is installed to support the SRS function, which can improve the integration of the RF system, and can save area, for example, about 13mm^2 of PCB area can be saved, which is conducive to the miniaturization of the device. In addition, the logic control of the switch circuit 130, the laying of the power supply network, etc. are all provided by the RF L-PA Mid device 10 itself, which will not affect other components of the RF PA Mid RF device, and can also reduce costs.

As shown in FIG. 13 and FIG. 14 , in one embodiment, the radio frequency transceiver system further includes a mid-to-high frequency L-PA Mid device 30 , a low, mid-to-high frequency diversity device 40 , a switch module 50 and a combiner module 60 . The mid-high frequency L-PA Mid device 30 is configured with a first antenna port ANT1 and a second antenna port ANT2, which are used to support transceiving and amplifying processing of multiple intermediate frequency signals and multiple high frequency signals. Specifically, the mid-high frequency L-PA Mid device 30 integrates multiple power amplifiers, low noise amplifiers, filters, switches and other components. The mid-high frequency L-PA Mid device 30 can realize the sending and receiving processing of 4G and 5G signals in multiple mid-frequency bands and 4G and 5G signals in multiple high-frequency bands. Among them, the 4G and 5G signals of multiple mid-frequency bands may at least include: 4G and 5G signals of frequency bands such as B4, B66, B1, N1, B25, B3, N3, B39, and B30; the 4G and 5G signals of multiple high-frequency bands can be Including 4G and 5G signals in frequency bands such as B7, N7, B40, B41, and N41.

The low, medium and high frequency diversity device 40 is configured with a low frequency antenna port LB ANT, a medium and high frequency antenna port MHB ANT, and a medium and high frequency transceiver port MHB TRX1 for supporting multiple low frequency signals, multiple intermediate frequency signals, and multiple high frequency signals. Diversity reception amplification processing. Specifically, the low-medium-frequency diversity device 40 integrates a plurality of low-noise amplifiers 121 , filters, switches and other components. The low, medium and high frequency diversity device 40 can realize the receiving and processing of the sum of 4G signals in multiple low, medium and high frequency bands, wherein the 4G signals in the low, medium and high frequency bands can at least include B4, B66, B1, B25, B3, B39 , B30, B7, B40, B41, B8, B26, B20, B28A, B28B, B12, B17, etc.

The switch module 50 is respectively connected to the first antenna port ANT1, the second antenna port ANT2 and the low frequency antenna port LB ANT. The multiple first ends of the combiner module 60 are respectively connected with the four round-shooting ports SRS1, SRS2, SRS3, LB ANT, and the switch module 50 in one-to-one correspondence, and the four second ends of the combiner module 60 are respectively connected with the first The antenna ANT0, the second antenna ANT1, the third antenna ANT2, and the fourth antenna ANT3 are connected in one-to-one correspondence.

In one embodiment, the switch module 50 includes: a seventh switch unit 510 and an eighth switch unit 520, and the combiner module 60 includes a first combiner 610, a second combiner 620, and a third combiner 630 and the fourth combiner 640 . The two first ends of the seventh switch unit 510 are respectively connected to the first antenna port ANT1 and the second antenna port ANT2 in a one-to-one correspondence; a first end of the first combiner 610 is connected to the one-shot port LB ANT , the other first end of the first combiner 610 is connected to a second end of the seventh switch unit 510, the second end of the first combiner 610 is connected to the first antenna ANT0; A first end of the second combiner 620 is connected to the other round-radiation port SRS1 and the low-frequency antenna port LB ANT respectively through the eighth switch unit 520, the other first end of the second combiner 620 is connected to the mid-high frequency antenna port MHB ANT, and the second combiner 620 is connected to the mid-high frequency antenna port MHB ANT. The second end of the combiner 620 is connected to the second antenna ANT1; a first end of the third combiner 630 is connected to another radio port SRS2, and the other first end of the third combiner 630 is connected to the seventh switch The other second end of the unit 510 is connected, the second end of the third combiner 630 is connected to the third antenna ANT2; a first end of the fourth combiner 640 is connected to another radio port SRS3, and the fourth combiner The other first end of the combiner 640 is connected to another second end of the seventh switch unit 510, the second end of the fourth combiner 640 is connected to the fourth antenna ANT3; the second end of the seventh switch unit 510 is connected to the middle and high Connect to the frequency transceiver port MHB TRX1.

The radio frequency transceiver system can be used to support the 1T4R function of the channel sounding reference signal of the low-frequency signal in the non-standalone networking mode. Any of the EN-DC, NE-DC and NGEN-DC architectures in non-independent networking mode. Under the EN-DC framework, the electronic equipment is connected to the 4G core network, the 4G base station is the main station, and the 5G base station is the auxiliary station; under the NE-DC framework, the 5G core network is introduced, the 5G base station is the main station, and the 4G base station is the auxiliary station; Under the NGEN-DC framework, the 5G core network is introduced, with the 4G base station as the main station and the 5G base station as the auxiliary station. Among them, DC stands for Dual Connectivity, namely Dual Connectivity (DC); E stands for Evolved-UMTS Terrestrial Radio Access (E-UTRA or EUTRA) of the Evolved Universal Mobile Telecommunications System (UMTS). ), that is, 4G radio access network; N stands for (new radio, NR), that is, 5G new radio; NG stands for (next generation, NG) next-generation core network, that is, 5G core network. EN-DC refers to the dual connection of 4G radio access network and 5G NR, NE-DC refers to the dual connection of 5G NR and 4G radio access network, and NGEN-DC refers to the dual connection of 4G radio access network and 4G radio access network under the 5G core network. Dual connectivity for 5G NR.

For the convenience of description, the following non-standalone networking mode is described by taking the EN-DC architecture as an example.

Under the EN-DC architecture, the radio frequency transceiver system of the embodiment of the present application supports the low-frequency 5G NR NSA standard. As shown in table 2:

Table 2 Low-frequency 5G NR NSA standard

N5 N8 N20 N28A N28B B12 L+L L+L L+L L+L L+L B1 M+L M+L M+L M+L M+L

Among them, the 5G NR NSA standard is divided into two modes: LB (Low band LTE)+LB (Low band NR) and MB (MiddleBand LTE)+LB NSA (Low band NR). In the table, L and M represent the Low Band and the Middle Band, respectively.

For convenience, the embodiment of the present application uses B1+N8 to describe the working principle of the radio frequency transceiver system supporting the low-frequency 5G NR NSA standard. Among them, LTE B1, as the anchor point of 5G, establishes a signaling connection first. The working principle of B1 is as follows:

The transmit path of B1:

RF transceiver → 4G MB RFIN port of mid-high frequency L-PA Mid device 30 → MB 4G PA → SP5T switch → B1 TX path → Filter (Filter) → DP7T switch → first antenna ANT0 port ANT1 → Path1 → eighth switch Cell 520→Path4→MHB TRX1 port of LMHB DRX→SP7T switch→MHB ANT port of LMHB DRX→Path7→second combiner 620→second antenna ANT1.

The receive path of B1:

Second Antenna ANT1 → Second Combiner 620 → Path7 → MHB ANT Port of LMHB DRX → SP7T Switch → MHB TRX1 Port of LMHB DRX → Path4 → Eighth Switch Unit 520 → Path1 → First Antenna ANT0 Port ANT1 → DP7T Switch →Filter→B1 RX channel→SP3T#3 switch→Low noise amplifier 121 (LNA4)→4P4T#2 switch→RF transceiver.

The transmission path of N8:

RF transceiver→first low frequency transmit port 4G LB RFIN of RF L PA Mid device→first power amplifier 111→third switch unit 112→N8 TX channel→first filter unit 113→switch circuit 130→rounder port LBANT→ Path11→first combiner 610→first antenna ANT0.

The receive path of N8:

The first antenna ANT0→the first combiner 610→Path11→the round-robin port LB ANT→the switch circuit 130→N8RX channel→the second filter unit 123→the first RF switch 1221→the first low noise amplifier 1211→the fifth switch unit 124→sixth switch unit 126→receiving port→radio frequency transceiver.

Further, the SRS working path of N8 in NSA mode is as follows:

RF transceiver→first low frequency transmit port 4G LB RFIN of RF L PA Mid device→first power amplifier 111→third switch unit 112→N8 TX channel→first filter unit 113→switch circuit 130→rounder port LBANT→ Path11→first combiner 610→first antenna ANT0, realizing the SRS function; switch circuit 130→rounder port SRS1→Path12→second combiner 620→second antenna ANT1, realizing the SRS function; switch circuit 130→rounder Radio port SRS2→Path13→third combiner 630→third antenna ANT2 to implement the SRS function; switch circuit 130→round radio port SRS3→Path14→fourth combiner 640→fourth antenna ANT3 to implement the SRS function. Specifically, the SRS path in the NSA standard is shown in Table 3.

Table 3 SRS detailed path configuration table of NSA standard

N5/N8/N20/N28A/N28B Channel0 Path11 Channel1 Path12 Channel2 Path13 Channel3 Path14

In Table 3, Channel0, Channel1, Channel2, and Channel3 are the transmission path paths that the antennas transmit in turn.

Based on the radio frequency transceiver system shown in FIG. 13 and FIG. 14 , by optimizing the internal structure of the radio frequency L-PA Mid device 10 , configuring four radio ports in the device, and designing the switch circuit 130 in the device, it is possible to avoid the The 1T4R SRS function of the low-frequency signal can be realized by using an external switch in the radio frequency transceiver system, so that the radio frequency transceiver system can support the low-frequency 5G NR NSA standard, which can save the occupied area of the PCB board occupied by the components in the radio frequency transceiver system (for example, The PCB area of about 13mm^2 can be saved), which is beneficial to the miniaturization of the PCB board. At the same time, the radio frequency L-PA Mid device 10 can independently control each switch in the switch circuit 130, and will not affect other radio frequencies in the radio frequency transceiver system. The device has an impact and can also reduce costs. In addition, the RF system can also realize the 1T4R SRS function of medium and high frequency signals.

Meanwhile, the switch circuit 130 in the radio frequency transceiver system shown in FIG. 14 is a multi-channel selection switch 133 (for example, a 4P9T switch). The switch circuit 130 in the radio frequency transceiver system shown in FIG. 13 includes a first switch unit 131 ( SP9T switch) and the second switch unit 132 (SP4T switch). The multi-channel selection switch 133 is formed by integrating the first switch unit 131 (SP9T switch) into the second switch unit 132 (SP4T switch). Therefore, compared with the first switch unit 131 and the second switch unit 132 , the multi-channel selection switch 133 saves a first-level switch (SP4T switch), which not only reduces the occupied space inside the device, but also saves the link insertion loss. Among them, the insertion loss value of the DP4T switch is shown in Table 4. It can be seen that the insertion loss of the SP4T switch in the N41 frequency band is as high as 0.5dB.

Table 4 SP4T switch insertion loss

Frequency (MHz) 698～960 1700～2200 2300～2700 Insertion Loss (dB) 0.25 0.3 0.35

Analysis of Table 4 shows that the link loss of the improved low-frequency 5G NR scheme is reduced by 0.25dB, and the sensitivity of the receiving link can be increased by 0.25dB.

As shown in FIG. 15 and FIG. 16 , in one embodiment, the radio frequency system further includes: a first MIMO receiving module 70 , a second MIMO receiving module 80 , a ninth switch unit 910 and a tenth switch unit 920 . Wherein, the first MIMO receiving module 70 is configured to support the main set receiving and amplifying processing of multiple intermediate frequency signals and multiple high frequency signals. The second MIMO receiving module 80 is configured to support diversity receiving and amplifying processing of multiple intermediate frequency signals and multiple high frequency signals. The ninth switch unit 910, a first end of the ninth switch unit 910 is connected to the other second end of the seventh switch unit 510, and the other first end of the ninth switch unit 910 is connected to the first MIMO receiving module 70, The second end of the ninth switch unit 910 is connected to the other first end of the third combiner 630 ; the tenth switch unit 920 , a first end of the tenth switch unit 920 is connected to another first end of the seventh switch unit 510 The two ends are connected, the other first end of the tenth switch unit 920 is connected to the second MIMO receiving module 80 , and the second end of the tenth switch unit 920 is connected to the other first end of the fourth combiner 640 .

The RF transceiver system shown in Figure 15 and Figure 16, in addition to supporting the SRS function under the NSA standard of the N5, N8, N20, N28A, N28B frequency bands, it can also support the 4*4 MIMO function of multiple medium and high frequency signals, which expands the The communication frequency band of the radio frequency system, and the communication performance of the radio frequency system is improved.

An embodiment of the present application further provides a communication device, the communication device is provided with the radio frequency transceiver system in any of the above embodiments, and by setting the radio frequency transceiver system on the communication device, the cost can be reduced and the integration degree of the device can be improved , reduces the area of the substrate occupied by each device in the radio frequency system, can also support the SRS function under the NSA standard of the N5, N8, N20, N28A, N28B frequency bands, and can also support the 4*4 MIMO function of multiple medium and high frequency signals, expanding the The communication frequency band of the radio frequency system, and the communication performance of the radio frequency system is improved.

The above examples only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent of the present application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (15)

1. a radio frequency L-PA Mid device is characterized in that, be configured with the first low frequency transmitting port and at least one receiving port for connecting the radio frequency transceiver and four round-emitting ports for connecting the antenna, the radio frequency L -PA Mid devices include: a transmitting circuit, connected to the first low-frequency transmitting port, and configured to amplify at least three low-frequency signals received by the first low-frequency transmitting port, a receiving circuit, which is respectively connected with a plurality of receiving ports, and is used for amplifying the plurality of low-frequency signals received by the round-emitting ports and outputting them through the receiving ports; a switch circuit, the switch circuit is respectively connected with the transmitting circuit, the receiving circuit, and the four round-emitting ports, and is used to select and conduct the radio frequency path between the transmitting circuit, the receiving circuit and any round-emitting port, respectively, to support alternate transmission of any one of the low-frequency signals among the four transmission ports; wherein, the transmission circuit includes: a first power amplifier, the input end of the first power amplifier is connected to the first low-frequency transmitting port; a third switch unit, the first end of the third switch unit is connected to the output end of the first power amplifier; a plurality of first filtering units, the input terminals of each of the first filtering units are correspondingly connected to a second terminal of the third switching unit, and the output terminals of each of the first filtering units are correspondingly connected to the switching circuit, is used for filtering the received low-frequency signal, and the frequency bands of the low-frequency signal output by each of the first filtering units are different; wherein, the first power amplifier is used for filtering the first low-frequency signal. The plurality of low-frequency signals received by the transmit port are subjected to power amplification processing, and the processed low-frequency signals are transmitted to each of the first filtering units through the third switching unit. 2. The radio frequency L-PA Mid device according to claim 1, wherein the switch circuit comprises a multi-channel selection switch, wherein a plurality of first ends of the multi-channel selection switch respectively correspond to the transmitting circuit, the The receiving circuit is connected; the four second ends of the multi-channel selection switch are respectively connected with the four round-emitting ports in one-to-one correspondence. 3. The radio frequency L-PA Mid device according to claim 1, wherein the switch circuit comprises: a first switch unit, comprising a plurality of first ends and a second end, and the plurality of first ends of the first switch unit are respectively connected to the transmitting circuit and the receiving circuit; The second switch unit includes a first end and four second ends; the first end of the second switch unit is connected to the second end of the first switch unit, and the four second ends of the second switch unit The two ends are respectively connected with the four round-shooting ports in one-to-one correspondence. 4. The radio frequency L-PA Mid device according to any one of claims 1-3, wherein the receiving circuit comprises: at least one low-noise amplifier, the output end of each low-noise amplifier is correspondingly connected to one of the receiving ports; a fourth switch unit, wherein at least one first end of the fourth switch unit is connected to the output end of at least one of the low noise amplifiers in a one-to-one correspondence; A plurality of second filter units, the input end of each second filter unit is correspondingly connected to the switch circuit, and the output end of each second filter unit is correspondingly connected to a second end of the fourth switch unit is used for filtering the received low frequency band signal, and the frequency band of the low frequency band signal output by each of the second filtering units is different. 5. The radio frequency L-PA Mid device according to claim 4, wherein the number of the receiving ports is three, and the number of the low-noise amplifiers is two, which are respectively denoted as the first low-noise amplifier and the second low-noise amplifier, The receiving circuit further includes an attenuator and a fifth switch unit, wherein, The output end of the first low noise amplifier is connected to the first end of the fifth switch unit, a second end of the fifth switch unit is connected to the receiving port, and the other end of the fifth switch unit is connected to the receiving port. A second end is connected to the other receiving port through the attenuator; the output end of the first low noise amplifier is connected to the other receiving port. 6. The radio frequency L-PA Mid device according to claim 5, the receiving circuit further comprises: a sixth switch unit, the three first ends of the sixth switch unit are respectively connected with the three receiving ports in one-to-one correspondence, and the three second ends of the sixth switch unit are respectively connected with the output of the first low noise amplifier The terminal, the attenuator, and the output terminal of the first low-noise amplifier are connected in one-to-one correspondence. 7. The radio frequency L-PA Mid device according to claim 1, the radio frequency L-PA Mid device is further configured with a second low frequency transmitting port, a high frequency transmitting port and a high frequency output port, the radio frequency L-PA Mid device is further configured with a second low frequency transmitting port, a high frequency transmitting port and a high frequency output port Mid devices also include: A second power amplifier, the input end of the second power amplifier is connected to the second low-frequency transmitting port, and the output end of the second power amplifier is connected to a first end of the switch circuit for receiving 2G low-frequency signals are amplified; wherein, the low-frequency signals are 4G signals and 5G signals; A third power amplifier, the input end of the third power amplifier is connected to the high-frequency transmit port, and the output end of the second power amplifier is connected to the high-frequency output port, for receiving 2G high-frequency signals to zoom in. 8. The radio frequency L-PA Mid device according to claim 1, the radio frequency L-PA Mid device is further configured with a plurality of auxiliary transmit ports, a plurality of auxiliary transceiver ports and a plurality of auxiliary receive ports for connection with an external switching circuit , wherein a plurality of auxiliary transmitting ports are respectively connected with the transmitting circuit, a plurality of the auxiliary transceiving ports are connected with the switching circuit, and a plurality of auxiliary receiving ports are connected with the receiving circuit. 9. The radio frequency L-PA Mid device according to claim 1, wherein the radio frequency L-PA Mid device is further configured with a coupling output port, and the radio frequency L-PA Mid device further comprises: A coupling circuit is arranged in the radio frequency path between the switch circuit and the round-emitting port, and is used for coupling the low frequency signal in the radio frequency path, so as to output the coupled signal through the coupling output port. 10. The radio frequency L-PA Mid device according to claim 1, the frequency bands of the low frequency signal at least include: B8, B12, B20, B26, N8, N5, N20, B28A, N28A, B28B, B13 and B29 frequency bands . 11. A radio frequency transceiver system, comprising: a first antenna, a second antenna, a third antenna, a fourth antenna, a radio frequency transceiver and the radio frequency L-PA according to any one of claims 1-10 Mid device, wherein the first antenna, the second antenna, the third antenna and the fourth antenna are respectively connected to the four radio ports of the radio frequency L-PA Mid device in a one-to-one correspondence; the radio frequency transceiver, respectively It is connected to the transmitting port and the receiving port of the radio frequency L-PA Mid device to support the alternate transmission of any one of the low frequency signals among the first antenna, the second antenna, the third antenna and the fourth antenna. 12. The radio frequency transceiver system according to claim 11, wherein the radio frequency transceiver system further comprises: A mid-to-high frequency L-PA Mid device, the mid-to-high frequency L-PA Mid device is configured with a first antenna port and a second antenna port, and is used to support transceiving and amplifying processing of multiple intermediate frequency signals and multiple high frequency signals; A low, medium and high frequency diversity device, the low, medium and high frequency diversity device is configured with a low frequency antenna port, a medium and high frequency antenna port and a medium and high frequency transceiver port, and is used to support multiple low frequency signals, multiple intermediate frequency signals, and multiple high frequency signals. Diversity receiving and amplifying processing; a switch module, which is respectively connected to the first antenna port, the second antenna port and the low frequency antenna port; A combiner module, wherein the multiple first ends of the combiner module are respectively connected with the four radiating ports and the switch module in a one-to-one correspondence, and the four second ends of the combiner module are respectively connected with the first The antenna, the second antenna, the third antenna, and the fourth antenna are connected in one-to-one correspondence; The radio frequency transceiver system is used to support the 1T4R function of the channel sounding reference signal of the low frequency band signal in the non-standalone networking mode. 13. The radio frequency transceiver system according to claim 12, wherein the switch module comprises: a seventh switch unit and an eighth switch unit, and the combiner module comprises a first combiner, a second combiner , the third combiner and the fourth combiner, wherein, The two first ends of the seventh switch unit are respectively connected with the first antenna port and the second antenna port in a one-to-one correspondence; A first end of the first combiner is connected to the one-shot port, the other first end of the first combiner is connected to a second end of the seventh switch unit, and the first the second end of the combiner is connected to the first antenna; A first end of the second combiner is respectively connected to another round-emitting port and a low frequency antenna port through the eighth switch unit, and the other first end of the second combiner is connected to the medium and high frequency the antenna port is connected, and the second end of the second combiner is connected with the second antenna; A first end of the third combiner is connected to another radio port, another first end of the third combiner is connected to another second end of the seventh switch unit, and the first The second end of the triplexer is connected to the third antenna; A first end of the fourth combiner is connected to another radio port, another first end of the fourth combiner is connected to another second end of the seventh switch unit, and the first The second end of the quad combiner is connected to the fourth antenna; A second end of the seventh switch unit is connected to the medium and high frequency transceiver port. 14. The radio frequency transceiver system according to claim 13, wherein the radio frequency transceiver system further comprises: The first MIMO receiving module is used to support the main set receiving and amplifying processing of multiple intermediate frequency signals and multiple high frequency signals; The second MIMO receiving module is used to support diversity receiving and amplifying processing of multiple intermediate frequency signals and multiple high frequency signals; a ninth switch unit, a first end of the ninth switch unit is connected to the other second end of the seventh switch unit, and the other first end of the ninth switch unit is connected to the first MIMO receiving module , the second end of the ninth switch unit is connected to the other first end of the third combiner; A tenth switch unit, a first end of the tenth switch unit is connected to another second end of the seventh switch unit, and another first end of the tenth switch unit is connected to a second MIMO receiving module , the second end of the tenth switch unit is connected to the other first end of the fourth combiner. 15. A communication device comprising a radio frequency transceiver system as claimed in any one of claims 11-14.

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