TWI711973B - Radio frequency identification device - Google Patents

Abstract

A radio frequency identification device (RFID) includes an antenna, a first RFID IC and a second RFID IC. The antenna includes a first antenna pattern, a second antenna pattern and a shared emitting part, wherein the first antenna pattern and the second antenna patter connect to the shared emitting part separately. The first RFID IC electronically connects to the first antenna pattern and is used to transmit a first data using the first antenna pattern and the shared emitting part. The second RFID IC electronically connects to the second antenna pattern and is used to transmit a second data using the second antenna pattern and the shared emitting part.

Description

Radio frequency identification device

The present invention relates to a radio frequency identification device, in particular to a radio frequency identification device capable of simultaneously accessing a plurality of data.

Radio Frequency Identification (RFID) technology has developed rapidly in recent years. Passive radio frequency identification devices are especially common in applications including identification cards, access cards, leisure cards, and cargo management in the logistics industry. This technology can also be used wirelessly. Way to read data, so it can effectively save labor and time costs.

RFID is a technology that wirelessly transmits information on its built-in chip. Radio frequency identification devices can be divided into two types: Active and Passive. Active radio frequency identification devices have a built-in battery, so they can actively transmit information to the reader at any time, and have better Communication distance; and the passive radio frequency identification device relies on the radio frequency identification device to enter the magnetic field of the reader, the magnetic field will change the reader and the antenna circuit in the radio frequency identification device inductively coupled, and then The radio frequency identification device generates induced current and transmits the information stored in the built-in chip to the reader, so its communication distance is shorter. However, the advantage of the passive radio frequency identification device lies in its lower cost and smaller size. It is more convenient to carry.

However, the current passive radio frequency identification device is limited to only reading one piece of data at a time, so it is difficult to achieve the purpose of accessing multiple pieces of data at the same time, and still has inconvenience in use.

In view of the above, the present invention provides a radio frequency identification device that meets the above requirements. By building a plurality of chips in the radio frequency identification device, the plurality of chips are arranged in series with an antenna circuit to achieve simultaneous reading The purpose of fetching the plural chip data.

A wireless radio frequency identification device according to the present invention includes: an antenna having A first antenna pattern, a second antenna pattern, and a common transmitting part, wherein the first antenna pattern and the second antenna pattern are respectively connected to the common transmitting part; a first radio frequency identification chip, electrical Connected to the first antenna pattern, and used to transmit a first data through the first antenna pattern and the shared transmitting part; and a second radio frequency identification chip, electrically connected to the second antenna pattern, And it is used to send a second data through the second antenna pattern and the shared transmitting part.

In the present invention, the first antenna pattern and the second antenna pattern are connected by a common transmitting part, wherein the first antenna pattern and the second antenna pattern are respectively electrically connected to the first radio frequency identification chip and the second radio Radio frequency identification chip to achieve the purpose of multiple data stored in multiple chips can be read at the same time.

The above description of the content of the disclosure and the description of the following embodiments are used to demonstrate and explain the spirit and principle of the present invention, and to provide a further explanation of the patent application scope of the present invention.

1, 1’, 1”: Radio frequency identification device

10, 10’: the first antenna pattern

12: The first radio frequency identification chip

12a: first pin

12b: second pin

14: The first matching segment

16: second matching segment

18: First Launch Department

20, 20’: second antenna pattern

22, 22’: Second RFID chip

22a, 22a’: third pin

22b, 22b’: Fourth pin

24, 24’: Third matching segment

26, 26’: Fourth matching segment

28, 28’: The second launching part

30: Third antenna pattern

32: The third radio frequency identification chip

32a: fifth pin

32b: sixth pin

34: Fifth matching segment

36: Sixth matching segment

38: Third Launch Department

E: Shared launching department

E1: The first shared launching department

E2: The second shared launching department

Fig. 1 is a schematic diagram of a radio frequency identification device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a radio frequency identification device according to another embodiment of the present invention.

FIG. 3 is a schematic diagram of a radio frequency identification device according to another embodiment of the present invention.

The detailed features and advantages of the present invention are described in detail in the following embodiments, and the content is sufficient to enable anyone familiar with the relevant art to understand the technical content of the present invention and implement it accordingly, and according to the content disclosed in this specification, the scope of patent application and the drawings Anyone who is familiar with the relevant art can easily understand the related purpose and advantages of the present invention. The following examples further illustrate the viewpoints of the present invention in detail, but do not limit the scope of the present invention by any viewpoint.

Please refer to FIG. 1, which is a wireless radio according to an embodiment of the present invention. Schematic diagram of frequency identification device. The radio frequency identification device 1 of this embodiment may be a passive electronic tag (Tag). The radio frequency identification device 1 includes an antenna having a first antenna pattern 10, a second antenna pattern 20, and a common transmitting part E, and the radio frequency identification device 1 further includes a first radio frequency identification chip 12 and a second radio frequency identification The chip 22, in which the first antenna pattern 10 and the second antenna pattern 20 are respectively connected to the common transmitting part E, and the first radio frequency identification chip 12 is used to emit a signal through the first antenna pattern 10 and the common transmitting part E The first data and the second radio frequency identification chip 22 are used to transmit a second data through the second antenna pattern 20 and the shared transmitting part E.

Please continue to refer to FIG. 1, the aforementioned first antenna pattern 10 includes a first matching section 14, a second matching section 16 and a first transmitting part 18. The first matching section 14 and the second matching section 16 are respectively connected to the first pin 12a and the second pin 12b of the first radio frequency identification chip 12, and the first matching section 14 and the second matching section 16 may be formed together A connecting section (the line segment under the first radio frequency identification chip 12 in the drawing of FIG. 1) is used for impedance matching. In particular, the first matching section 14 and the second matching section 16 can be designed so that the path length between the first RFID chip 12 and the second RFID chip 22 is one-half wavelength. The end of the first matching section 14 that is not connected to the first pin 12a is connected to the first emitting portion 18; the end of the second matching section 16 that is not connected to the second pin 12ba is connected to the common emitting portion E. Similarly, the second antenna pattern 20 includes a third matching section 24, a fourth matching section 26 and a second transmitting part 28. The third matching section 24 and the fourth matching section 26 are respectively connected to the third pin 22a and the fourth pin 22b of the second radio frequency identification chip 22, and the third matching section 24 and the fourth matching section 26 are separated from each other. The end of the third matching section 24 that is not connected to the third pin 22 a is connected to the common transmitting portion E; the end of the fourth matching section 26 that is not connected to the fourth pin 22 b is connected to the second transmitting portion 28.

Please continue to refer to FIG. 1, where the first radio frequency identification chip 12 and the second radio frequency identification chip 22 may have different impedance values, and four matching segments 14, 16, 24 matching the two identification chips 12, 22 , 26 can have the same length. In addition, the first radio frequency identification chip 12 and the second radio frequency identification chip 22 can store the same data (ie, the first One data is the same as the second data), but it is better to store different data (that is, the first data is different from the second data). This way, compared to the general radio frequency identification device with only a single radio frequency identification chip , The radio frequency identification device 1 can have more data storage content. The embodiment of FIG. 1 of the present invention discloses that the radio frequency identification device 1 connects the first antenna pattern 10 and the antenna pattern 20 in series through the shared transmitting part E, so that the reader can read the first radio frequency of the radio frequency identification device 1 at the same time. The data stored in the identification chip 12 and the second radio frequency identification chip 22.

Please refer to FIG. 2, which is a schematic diagram of a radio frequency identification device according to another embodiment of the present invention. The radio frequency identification device 1 of this embodiment has the same components as the radio frequency identification device 1 of FIG. 1, but the difference between the two is that the second antenna pattern 20' of FIG. 2 is different from the second antenna pattern 20 of FIG. That is, the second antenna pattern 20 ′ and the common emitting portion E of FIG. 2 are arranged in a configuration area, and the area of the configuration area is smaller than or equal to the area of the first emitting portion 18. In more detail, when the impedances of the first radio frequency identification chip 12 and the second radio frequency identification chip 22' are set to be different, the lengths of the third matching section 24' and the fourth matching section 26' can be made different from the first The lengths of a matching section 14 and a second matching section 16 further make the first antenna pattern 10 and the second antenna pattern 20' have different sizes. Therefore, the present embodiment can be improved based on an antenna structure with only a single RFID chip, and most of the antenna structure constitutes the first antenna pattern 10, and the rest of the antenna structure (such as the original One of the two transmitting parts) is replaced by the second antenna pattern 20' and the common transmitting part E, so that a radio frequency identification device with a plurality of radio frequency identification chips can still be constructed.

Please continue to refer to FIG. 2, by arranging the second antenna pattern 20' and the common transmitting portion E in the configuration area less than or equal to the first transmitting portion 18, compared with the antenna structure of a single radio frequency identification chip In other words, it is possible to have a plurality of radio frequency identification chips when the overall installation volume is at least the same; compared with the embodiment of FIG. 1, it is in addition to loading the plurality of radio frequency identification chips and simultaneously reading the plurality of radio frequency identification chips. In addition to the purpose, the overall installation volume of the radio frequency identification device 1 can be effectively reduced.

Please refer to FIG. 3, which is a diagram of a wireless device according to another embodiment of the present invention. A schematic diagram of the radio frequency identification device 1". The radio frequency identification device 1" of this embodiment not only has the components of the radio frequency identification device 1 and 1'of FIGS. 1 and 2, and the radio frequency identification device 1" further includes a third antenna pattern 30 and the third radio frequency identification chip 32, wherein the third antenna pattern 30 is electrically connected to the first antenna pattern 10', and the third radio frequency identification chip 32 is electrically connected to the third antenna pattern 30. The third radio frequency identification The chip 32 is used to transmit a third data through the third antenna pattern 30 and part of the first antenna pattern 10'. The third data can be the same as the first data or the second data, or different from both. In this embodiment, the first common transmitting portion E1 is equivalent to the common transmitting portion E of the previous embodiment, and the second common transmitting portion E2 is similar to the first transmitting portion 18 of the previous embodiment, which means that the aforementioned Part of the first antenna pattern 10' is the second common transmitting part E2, and the third antenna pattern 30 is electrically connected to the second common transmitting part E2. In more detail, the third antenna pattern 30 is similar to the first The configuration of the two antenna patterns 20' has a fifth matching section 34, a sixth matching section 36 and a third transmitting part 38, wherein the fifth matching section 34 and the sixth matching section 36 are respectively connected to the third radio frequency identification chip The fifth pin 32a and the sixth pin 32b of 32, and the fifth matching section 34 and the sixth matching section are separated from each other. In particular, the first matching section 14 and the second matching section 16 can be designed so that the first radio frequency The length of the path between the identification chip 12 and the third radio frequency identification chip 32 is one-half wavelength. The end of the fifth matching section 34 that is not connected to the fifth pin 32a is connected to the second common emitter E2; the sixth matching The end of the segment 36 that is not connected to the sixth pin 32 b is connected to the third emitting portion 38.

Please continue to refer to FIG. 3, by arranging the third antenna pattern 30 and the second common emitting portion E2 in the configuration area of the first emitting portion 18 of FIG. 2 with an area less than or equal to that of FIG. 2, the overall installation volume can be at least the same In the embodiment shown in FIG. 3, a third radio frequency identification chip 32 is further loaded. Therefore, the radio frequency identification device of this embodiment can further expand the data storage content compared to the previous embodiment without increasing the organization volume.

In the present invention, the matching sections are made of conductive materials, and the required antenna field can be realized in various patterns to realize inductive coupling. The working frequency of these matching sections can be based on the physical properties of the antenna field, for example, based on the length and width of the antenna coil section. However, the present invention is not limited to the length, the number of antenna coils, and the material of the antenna.

The radio frequency identification device provided by the present invention discloses that a plurality of radio frequency identification chips are connected in series, so that the radio frequency identification device is not limited to that the radio frequency identification chips can only have the same impedance value. That is, as long as the impedance value of the RFID chip and the corresponding antenna pattern can match each other, it can work. Therefore, when selecting a radio frequency identification chip, consideration can be made based on the specifications, price, and performance of each chip, and then multiple brands or identification chips with specific impedance values can be set on a single antenna. In addition, the radio frequency identification device provided by the present invention can also be loaded with a second radio frequency identification chip and a third radio frequency identification chip without increasing the size of the radio frequency identification device, so as to simultaneously read multiple radio frequency identification chips. The purpose.

Although the present invention is disclosed in the foregoing embodiments, it is not intended to limit the present invention. All changes and modifications made without departing from the spirit and scope of the present invention fall within the scope of patent protection of the present invention. For the scope of protection defined by the present invention, please refer to the attached patent scope.

1": Radio frequency identification device

10’: The first antenna pattern

12: The first radio frequency identification chip

12a: first pin

12b: second pin

14: The first matching segment

16: second matching segment

20’: The second antenna pattern

22’: The second radio frequency identification chip

22a’: third pin

22b’: Fourth pin

24’: Third matching segment

26’: Fourth matching segment

28’: The second launch part

30: Third antenna pattern

32: The third radio frequency identification chip

32a: fifth pin

32b: sixth pin

34: Fifth matching segment

36: Sixth matching segment

38: Third Launch Department

E1: The first shared launching department

E2: The second shared launching department

Claims (8)

A wireless radio frequency identification device, comprising: an antenna having a first antenna pattern, a second antenna pattern and a common transmitting part, wherein the first antenna pattern and the second antenna pattern are respectively connected to the common transmitting part Section; a first radio frequency identification chip, electrically connected to the first antenna pattern, and used to send a first data through the first antenna pattern and the common transmitting part; and a second radio frequency identification The chip is electrically connected to the second antenna pattern, and is used to transmit a second data through the second antenna pattern and the common transmitting part, wherein the first antenna pattern includes a first transmitting part, a A first matching section and a second matching section, wherein the first matching section is connected to the first transmitting part, the second matching section is connected to the common transmitting part, and the two pins of the first radio frequency identification chip are respectively Connected to the first matching segment and the second matching segment. The radio frequency identification device according to claim 1, wherein the second antenna pattern includes a second transmitting part, a third matching section, and a fourth matching section, wherein the third matching section is connected to the common transmitting Section, the fourth matching section is connected to the second emitting section, and the third matching section and the fourth matching section are separated from each other, and The two pins of the second radio frequency identification chip are respectively connected to the third matching section and the fourth matching section. The radio frequency identification device according to claim 1, wherein the radio frequency identification device further comprises a third antenna pattern and a third radio frequency identification chip, the third antenna pattern is electrically connected to the first antenna pattern, And the third radio frequency identification chip is electrically connected to the third antenna pattern, and is used to send a third data through the third antenna pattern and part of the first antenna pattern. The radio frequency identification device according to claim 1, wherein the radio frequency identification device further includes a third antenna pattern and a third radio frequency identification chip, the common transmitting part is a first common transmitting part, and the first The transmitting portion is a second common transmitting portion, the third antenna pattern is electrically connected to the second common transmitting portion, and the third wireless identification chip is used for transmitting through the third antenna pattern and the second common transmitting portion One third information. The radio frequency identification device according to claim 4, wherein the third antenna pattern includes a third transmitting portion, a fifth matching section, and a sixth matching section, wherein the fifth matching section is connected to the first transmitting section Section, the sixth matching section is connected to the third transmitting section, and the fifth matching section and the sixth matching section are separated from each other, and the two pins of the third radio frequency identification chip are respectively connected to the fifth matching section And the sixth matching segment. The radio frequency identification device according to claim 1, wherein the first radio frequency identification chip and the second radio frequency identification chip have different impedance values. The radio frequency identification device according to claim 1, wherein the first data is different from the second data. The radio frequency identification device according to claim 1, wherein the second antenna pattern and the common transmitting part are arranged in a configuration area, and the area of the configuration area is smaller than or equal to the area of the first transmitting part.

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