CN105870573A - Vertical flexible and stretchable antenna and production method thereof - Google Patents
Vertical flexible and stretchable antenna and production method thereof Download PDFInfo
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- H—ELECTRICITY
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Abstract
一种立式的柔性可拉伸天线，属于天线技术领域。包括可拉伸基板、图形化的金属/柔性介质基板、同轴电缆，所述图形化的金属/柔性介质基板包括天线结构和支撑结构，所述图形化的金属/柔性介质基板通过支撑结构与可拉伸基板连接，并通过支撑结构中的金属层与同轴电缆馈电，以实现天线与收发信机之间的电信号能量传输，所述天线结构在可拉伸基板上为拱形结构。本发明提供的立式可拉伸天线在使用时不会破坏天线结构，且在大幅度拉伸和弯曲下仍能实现高频信号的稳定传播，实现了在较大的拉伸条件下天线性能的稳定性，从而保证了可穿戴通讯系统通讯效果的稳定性；制作方法简单，成本低，易于实现大规模工业化生产。
A vertical flexible and stretchable antenna belongs to the technical field of antennas. It includes a stretchable substrate, a patterned metal/flexible dielectric substrate, and a coaxial cable. The patterned metal/flexible dielectric substrate includes an antenna structure and a support structure. The patterned metal/flexible dielectric substrate communicates with the support structure The stretchable substrate is connected and fed through the metal layer in the support structure and the coaxial cable to realize the electrical signal energy transmission between the antenna and the transceiver, and the antenna structure is an arched structure on the stretchable substrate . The vertical stretchable antenna provided by the present invention will not damage the antenna structure during use, and can still achieve stable propagation of high-frequency signals under large stretching and bending, and realizes antenna performance under relatively large stretching conditions stability, thereby ensuring the stability of the communication effect of the wearable communication system; the manufacturing method is simple, the cost is low, and it is easy to realize large-scale industrial production.
Description
技术领域technical field
本发明属于天线技术领域，具体涉及一种立式的柔性可拉伸天线及其制作方法。The invention belongs to the technical field of antennas, and in particular relates to a vertical flexible and stretchable antenna and a manufacturing method thereof.
背景技术Background technique
可穿戴式柔性天线具有柔软、易弯曲和可扭转等优点，已广泛应用于可穿戴通讯领域。常规的柔性天线只具备可弯曲性而不具备可拉伸性，使得其在应用中存在诸多限制，因此，研究和制作可拉伸天线对柔性天线的发展和应用具有至关重要的作用。Wearable flexible antennas have been widely used in the field of wearable communications due to their softness, flexibility, and twistability. Conventional flexible antennas are only bendable but not stretchable, so there are many limitations in their applications. Therefore, research and fabrication of stretchable antennas play a vital role in the development and application of flexible antennas.
目前，对可拉伸天线的研究主要是基于可拉伸衬底以及天线结构的形状进行的。Song,L等(Song,L.,Myers,A.C.,Adams,J.J.&Zhu,Y.Stretchable andreversibly deformable radio frequency antennas based on silver nanowires.ACSapplied materials&interfaces 6,4248-4253(2014))在PDMS柔性基底上利用银纳米线制作拉伸性达15％的可拉伸天线，天线中心频率从2.96GHz漂移到3.06GHz。Li,Z等(Li,Z.et al.Rational Design of a Printable,Highly ConductiveSilicone‐based Electrically Conductive Adhesive for Stretchable Radio‐FrequencyAntennas.Advanced Functional Materials 25,464-470(2015))公开了一种高电导率硅胶的天线结构，在其使用范围内拉伸性可达60％。Liu,Q等(Liu,Q.,Ford,K.L.,Langley,R.,Robinson,A.&Lacour,S.in Antennas and Propagation(EUCAP),20126th European Conference on.168-171(IEEE))公开了一种拉伸性为20％的倒F形天线。Hussain,A.M(Hussain,A.M.et al.Metal/Polymer Based Stretchable Antennafor Constant Frequency Far-Field Communication in Wearable Electronics.AdvancedFunctional Materials 25,6565-6575,doi:10.1002/adfm.201503277(2015))公开了一种拉伸性为30％的半圆形弹簧状天线。Fan,J.A等(Fan,J.A.et al.Fractal designconcepts for stretchable electronics.Nature Communications 5,doi:10.1038/ncomms4266(2014))公开了一种拉伸性为30％的自相似分形天线结构。上述天线仅具备小幅度的可拉伸性，在可穿戴通讯领域应用时会存在很多限制，因此研制能适应较大形变的天线显得尤为重要。At present, the research on stretchable antennas is mainly based on the shape of stretchable substrates and antenna structures. Song, L et al. (Song, L., Myers, A.C., Adams, J.J. & Zhu, Y. Stretchable and reversibly deformable radio frequency antennas based on silver nanowires. ACS applied materials & interfaces 6, 4248-4253 (2014)) used silver on PDMS flexible substrates The nanowires make a stretchable antenna with a stretchability of 15%, and the center frequency of the antenna drifts from 2.96GHz to 3.06GHz. Li, Z et al. (Li, Z. et al. Rational Design of a Printable, Highly Conductive Silicone‐based Electrically Conductive Adhesive for Stretchable Radio‐Frequency Antennas. Advanced Functional Materials 25, 464-470 (2015)) disclose a high conductivity silica gel Antenna structure with stretchability up to 60% within its range of use. Liu, Q et al. (Liu, Q., Ford, K.L., Langley, R., Robinson, A. & Lacour, S. in Antennas and Propagation (EUCAP), 20126th European Conference on.168-171 (IEEE)) disclosed a An inverted-F antenna with 20% stretchability. Hussain, A.M (Hussain, A.M. et al. Metal/Polymer Based Stretchable Antenna for Constant Frequency Far-Field Communication in Wearable Electronics. Advanced Functional Materials 25, 6565-6575, doi: 10.1002/adfm.201503277 (2015)) published A semi-circular spring-like antenna with a stretchability of 30%. Fan, J.A et al. (Fan, J.A. et al. Fractal design concepts for stretchable electronics. Nature Communications 5, doi: 10.1038/ncomms4266 (2014)) disclosed a self-similar fractal antenna structure with 30% stretchability. The above-mentioned antennas only have a small degree of stretchability, and there are many limitations in the application in the field of wearable communications. Therefore, it is particularly important to develop antennas that can adapt to large deformations.
发明内容Contents of the invention
本发明针对背景技术存在的缺陷，提出了一种立式的柔性可拉伸天线及其制作方法，有效解决了柔性天线拉伸性能差、制作成本高、穿戴过程中性能不稳定的问题。本发明可拉伸天线采用立式结构，使用时不会破坏天线结构，且在大幅度拉伸和弯曲下仍能实现高频信号的稳定传播；制作方法简单，成本低，易于实现大规模工业化生产。Aiming at the defects in the background technology, the present invention proposes a vertical flexible and stretchable antenna and a manufacturing method thereof, which effectively solve the problems of poor stretchability of the flexible antenna, high manufacturing cost, and unstable performance during wearing. The stretchable antenna of the present invention adopts a vertical structure, which will not damage the antenna structure during use, and can still achieve stable propagation of high-frequency signals under large stretching and bending; the manufacturing method is simple, the cost is low, and it is easy to realize large-scale industrialization Production.
本发明的技术方案如下：Technical scheme of the present invention is as follows:
一种立式的柔性可拉伸天线，包括可拉伸基板、图形化的金属/柔性介质基板、同轴电缆，所述图形化的金属/柔性介质基板包括天线结构和支撑结构，所述图形化的金属/柔性介质基板通过支撑结构与可拉伸基板连接，并通过支撑结构中的金属层与同轴电缆馈电，以实现天线与收发信机之间的电信号能量传输，所述天线结构在可拉伸基板上为拱形结构。A vertical flexible and stretchable antenna, including a stretchable substrate, a patterned metal/flexible dielectric substrate, and a coaxial cable, the patterned metal/flexible dielectric substrate includes an antenna structure and a supporting structure, the pattern The metallized metal/flexible dielectric substrate is connected to the stretchable substrate through the support structure, and the metal layer in the support structure is fed with the coaxial cable to realize the electrical signal energy transmission between the antenna and the transceiver. The antenna The structure is an arched structure on a stretchable substrate.
进一步地，所述立式的柔性可拉伸天线在制作时，首先将图形化的金属/柔性介质基板中的支撑结构固定于预拉伸至一定程度的可拉伸基板上，然后释放可拉伸基板，图形化的金属/柔性介质基板即会在可拉伸基板上拱起，形成立式的柔性可拉伸天线。Furthermore, when the vertical flexible and stretchable antenna is manufactured, the support structure in the patterned metal/flexible dielectric substrate is first fixed on the stretchable substrate that is pre-stretched to a certain extent, and then the stretchable substrate is released. Stretch the substrate, the patterned metal/flexible dielectric substrate will be arched on the stretchable substrate to form a vertical flexible stretchable antenna.
进一步地，所述图形化的金属/柔性介质基板中的天线结构的拱起高度可通过控制可拉伸基板的预拉伸程度进行控制。Further, the arching height of the antenna structure in the patterned metal/flexible dielectric substrate can be controlled by controlling the pre-stretching degree of the stretchable substrate.
进一步地，所述天线结构的拱起高度为0mm-5mm。Further, the arch height of the antenna structure is 0mm-5mm.
进一步地，所述图形化的金属/柔性介质基板中的柔性介质基板为不可拉伸基板。Further, the flexible dielectric substrate in the patterned metal/flexible dielectric substrate is a non-stretchable substrate.
进一步地，所述可拉伸基板为杨氏模量为10kPa～10MPa的高分子固化物，具体为PDMS(聚二甲基硅氧烷)、ecoflex(脂肪族芳香族无规共聚酯)等。Further, the stretchable substrate is a cured polymer with a Young's modulus of 10kPa to 10MPa, specifically PDMS (polydimethylsiloxane), ecoflex (aliphatic aromatic random copolyester), etc. .
进一步地，所述可拉伸基板的厚度为0.2-5mm。Further, the thickness of the stretchable substrate is 0.2-5mm.
进一步地，所述图形化的金属/柔性介质基板包括一段蛇形结构和两段条形结构组成的天线结构，以及两个哑铃状结构组成的支撑结构，所述两个哑铃状结构的中间部分的一侧通过条形结构实现与蛇形结构的连接，另一侧设置一槽形，用于与可拉伸基板进行粘贴固定。如图3所示，图形化的金属/柔性介质基板的支撑结构中，L1，L2，L3，L4为1-10mm，L5为0.5-5mm；天线结构中，L为3-30mm，w2为0.4-4mm，w1为0.2-2mm，d为0.2-2mm，D为3.2-32mm。Further, the patterned metal/flexible dielectric substrate includes an antenna structure composed of a serpentine structure and two strip structures, and a support structure composed of two dumbbell-shaped structures, the middle part of the two dumbbell-shaped structures One side is connected to the serpentine structure through a strip structure, and a groove is provided on the other side for pasting and fixing the stretchable substrate. As shown in Figure 3, in the supporting structure of the patterned metal/flexible dielectric substrate, L 1 , L 2 , L 3 , L 4 are 1-10mm, and L 5 is 0.5-5mm; in the antenna structure, L is 3- 30mm, w 2 is 0.4-4mm, w 1 is 0.2-2mm, d is 0.2-2mm, D is 3.2-32mm.
进一步地，所述天线结构为左右对称结构；所述支撑结构为上下对称结构，用于实现天线结构与基板之间的连接、支撑天线结构以及与同轴电缆之间进行馈电。Further, the antenna structure is a left-right symmetrical structure; the support structure is a vertical symmetrical structure, which is used to realize the connection between the antenna structure and the substrate, support the antenna structure, and feed power with the coaxial cable.
进一步地，所述图形化的金属/柔性介质基板是在聚酰亚胺等柔性介质基板上通过蒸发或溅射等方法制备金属膜，然后通过机械雕刻或激光刻蚀等方法形成天线结构和支撑结构得到；或者首先将聚酰亚胺等柔性介质基板通过机械雕刻或激光刻蚀等方法形成天线结构和支撑结构，然后再通过蒸发或溅射等方法在其上制备金属膜，得到图形化的金属/柔性介质基板。Further, the patterned metal/flexible dielectric substrate is to prepare a metal film on a flexible dielectric substrate such as polyimide by evaporation or sputtering, and then form an antenna structure and support by mechanical engraving or laser etching. structure; or first form the antenna structure and support structure by mechanical engraving or laser etching on flexible dielectric substrates such as polyimide, and then prepare a metal film on it by evaporation or sputtering to obtain a patterned Metal/flexible dielectric substrates.
进一步地，所述同轴电缆包括内导体、介质层、外导体和保护层，其一端为SMA母头，另一端为裸线，支撑结构的金属层通过裸线部分与同轴电缆连接；所述内导体的裸露部分≤1mm，介质层裸露1-2mm，外导体裸露2-100mm。Further, the coaxial cable includes an inner conductor, a dielectric layer, an outer conductor and a protective layer, one end of which is an SMA female head, and the other end is a bare wire, and the metal layer of the supporting structure is connected to the coaxial cable through the bare wire part; The exposed part of the inner conductor is ≤1mm, the dielectric layer is exposed 1-2mm, and the outer conductor is exposed 2-100mm.
进一步地，所述同轴电缆的内导体与支撑结构的金属层通过银浆或银漆粘接，或者通过焊锡点焊接。Further, the inner conductor of the coaxial cable and the metal layer of the supporting structure are bonded by silver paste or silver paint, or spot welded by solder.
一种立式的柔性可拉伸天线的制作方法，包括以下步骤：A method for manufacturing a vertical flexible and stretchable antenna, comprising the following steps:
步骤1：将可拉伸基板预拉伸至一定程度；Step 1: Pre-stretch the stretchable substrate to a certain extent;
步骤2：制作图形化的金属/柔性介质基板，然后将图形化的金属/柔性介质基板中的支撑结构固定于步骤1预拉伸至一定程度的基板上；Step 2: making a patterned metal/flexible dielectric substrate, and then fixing the support structure in the patterned metal/flexible dielectric substrate on the substrate pre-stretched to a certain extent in step 1;
步骤3：释放可拉伸基板，图形化的金属/柔性介质基板即会在可拉伸基板上拱起，从而得到立式的柔性可拉伸天线。Step 3: Release the stretchable substrate, and the patterned metal/flexible dielectric substrate will be arched on the stretchable substrate, thereby obtaining a vertical flexible and stretchable antenna.
本发明的有益效果为：The beneficial effects of the present invention are:
1、本发明提供的立式可拉伸天线在使用时不会破坏天线结构，且在大幅度拉伸和弯曲下仍能实现高频信号的稳定传播，实现了在较大的拉伸条件下天线性能的稳定性，从而保证了可穿戴通讯系统通讯效果的稳定性。1. The vertical stretchable antenna provided by the present invention will not damage the antenna structure during use, and can still achieve stable transmission of high-frequency signals under large stretching and bending, and realizes the stable transmission of high-frequency signals under relatively large stretching conditions. The stability of the antenna performance ensures the stability of the communication effect of the wearable communication system.
2、本发明立式可拉伸天线的制作方法简单，成本低，易于实现大规模工业化生产。2. The manufacturing method of the vertical stretchable antenna of the present invention is simple, low in cost, and easy to realize large-scale industrial production.
附图说明Description of drawings
图1为本发明提供的一种立式的柔性可拉伸天线的结构示意图；其中，1为可拉伸基板，2为天线结构，3为支撑结构，4为支撑结构馈电区域，5为同轴电缆；Fig. 1 is a structural schematic diagram of a vertical flexible stretchable antenna provided by the present invention; wherein, 1 is a stretchable substrate, 2 is an antenna structure, 3 is a support structure, 4 is a support structure feeding area, and 5 is coaxial cable;
图2为实施例的柔性可拉伸天线的制备流程示意图；Fig. 2 is a schematic diagram of the preparation process of the flexible and stretchable antenna of the embodiment;
图3为实施例的柔性可拉伸天线中图形化的金属/柔性介质基板的示意图；3 is a schematic diagram of a patterned metal/flexible dielectric substrate in the flexible and stretchable antenna of the embodiment;
图4为实施例的柔性可拉伸天线在不同拉伸程度下(拉伸0％、拉伸100％、拉伸200％)S11参数随频率变化的曲线图。Fig. 4 is a graph showing the variation of the S11 parameter with frequency under different stretching degrees (0%, 100% stretching, 200% stretching) of the flexible and stretchable antenna of the embodiment.
具体实施方式detailed description
下面结合附图和实施例，详述本发明的技术方案。The technical scheme of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
如图1所示，为本发明提供的一种立式的柔性可拉伸天线的结构示意图，包括可拉伸基板、图形化的金属/柔性介质基板、同轴电缆，所述图形化的金属/柔性介质基板包括天线结构和支撑结构，所述图形化的金属/柔性介质基板通过支撑结构与可拉伸基板固定连接，并通过支撑结构中的金属层与同轴电缆馈电，以实现天线与收发信机之间的电信号能量传输，所述天线结构在可拉伸基板上为拱形结构。As shown in Figure 1, it is a schematic structural diagram of a vertical flexible stretchable antenna provided by the present invention, including a stretchable substrate, a patterned metal/flexible dielectric substrate, a coaxial cable, and the patterned metal / The flexible dielectric substrate includes an antenna structure and a support structure, the patterned metal/flexible dielectric substrate is fixedly connected to the stretchable substrate through the support structure, and is fed through the metal layer in the support structure and the coaxial cable to realize the antenna The electric signal energy transmission between the transceiver and the antenna structure is an arched structure on a stretchable substrate.
进一步地，所述图形化的金属/柔性介质基板的支撑结构通过点胶的方法粘贴到预拉伸的基板上，固定后释放预拉伸，图形化的金属/柔性介质基板拱起，即可在可拉伸基板上形成立式的柔性可拉伸天线。Further, the support structure of the patterned metal/flexible dielectric substrate is pasted onto the pre-stretched substrate by dispensing glue, and the pre-stretching is released after being fixed, and the patterned metal/flexible dielectric substrate is arched. A vertical flexible and stretchable antenna is formed on a stretchable substrate.
进一步地，所述同轴电缆包括内导体、介质层、外导体和保护层，其一端为SMA母头，另一端为裸线，支撑结构的金属层通过裸线部分与同轴电缆连接；所述内导体的裸露部分≤1mm，介质层裸露1-2mm，外导体裸露2-100mm。Further, the coaxial cable includes an inner conductor, a dielectric layer, an outer conductor and a protective layer, one end of which is an SMA female head, and the other end is a bare wire, and the metal layer of the supporting structure is connected to the coaxial cable through the bare wire part; The exposed part of the inner conductor is ≤1mm, the dielectric layer is exposed 1-2mm, and the outer conductor is exposed 2-100mm.
进一步地，所述支撑结构中的金属层与同轴电缆的内导体焊接作为馈电，焊接点一端为支撑结构中的金属层，另一端为同轴电缆的内导体。Further, the metal layer in the support structure is welded to the inner conductor of the coaxial cable as a power feed, and one end of the welding point is the metal layer in the support structure, and the other end is the inner conductor of the coaxial cable.
实施例Example
本实施例立式的柔性可拉伸天线的基板为ecoflex(脂肪族芳香族无规共聚酯)，厚度为1.835mm；图形化的金属/柔性介质基板中的柔性介质基板为75μm厚的聚酰亚胺，金属为50nm厚的金；如图3所示，图形化的金属/柔性介质基板的支撑结构中：L1＝1mm，L2＝1mm，L3＝1mm，L4＝1mm，L5＝0.5mm，天线结构中：L＝3mm，w2＝0.4mm，w1＝0.2mm，d＝0.2mm，D＝3.2mm。The substrate of the vertical flexible and stretchable antenna in this embodiment is ecoflex (aliphatic aromatic random copolyester) with a thickness of 1.835 mm; the flexible dielectric substrate in the patterned metal/flexible dielectric substrate is a 75 μm thick poly imide, the metal is gold with a thickness of 50nm; as shown in Figure 3, in the supporting structure of the patterned metal/flexible dielectric substrate: L 1 =1mm, L 2 =1mm, L 3 =1mm, L 4 =1mm, L 5 =0.5mm, in the antenna structure: L=3mm, w 2 =0.4mm, w 1 =0.2mm, d=0.2mm, D=3.2mm.
如图2所示，实施例立式的柔性可拉伸天线的制作方法，具体包括以下步骤：As shown in Figure 2, the method for manufacturing the vertical flexible and stretchable antenna of the embodiment specifically includes the following steps:
步骤1、将ecoflex的A胶和B胶按照体积比为1:1的比例混合，在0.1Torr的真空环境下放置3～10min以除去气泡；然后倒入培养皿中静置24小时后，切割为2.5cm×2.5cm的大小，得到可拉伸基板，其厚度为1.835mm；Step 1. Mix ecoflex glue A and glue B according to the volume ratio of 1:1, and place it in a vacuum environment of 0.1 Torr for 3-10 minutes to remove air bubbles; then pour it into a petri dish and let it stand for 24 hours before cutting The size is 2.5cm×2.5cm to obtain a stretchable substrate with a thickness of 1.835mm;
步骤2、图形化的柔性介质基板的制备：将厚度为75μm的聚酰亚胺膜粘到热释放胶带上，然后放入机械雕刻机的切割垫上，采用机械雕刻法形成天线结构和支撑结构的图形；Step 2. Preparation of a patterned flexible dielectric substrate: stick a polyimide film with a thickness of 75 μm on a thermal release tape, then put it on the cutting mat of a mechanical engraving machine, and form the antenna structure and supporting structure by mechanical engraving graphics;
步骤3、将步骤2得到的带图形化的聚酰亚胺膜的热释放胶带从切割垫上剥离；Step 3, peeling off the thermal release tape with the patterned polyimide film obtained in step 2 from the cutting mat;
步骤4、在步骤3得到的图形化的聚酰亚胺膜表面采用磁控溅射法制备厚度为50nm的金层；Step 4, preparing a gold layer with a thickness of 50nm by magnetron sputtering on the surface of the patterned polyimide film obtained in step 3;
步骤5、将镀完金膜的聚酰亚胺膜放入烘箱中90℃保温20min，通过机械剥离的方法将热释放胶带剥离，得到图形化的金属/柔性介质基板；Step 5. Put the gold-plated polyimide film in an oven at 90°C for 20 minutes, and peel off the heat-release tape by mechanical stripping to obtain a patterned metal/flexible dielectric substrate;
步骤6、将步骤1得到的可拉伸基板采用单轴拉伸夹具拉伸至200％，得到预拉伸基板；Step 6. Stretching the stretchable substrate obtained in step 1 to 200% with a uniaxial stretching fixture to obtain a pre-stretched substrate;
步骤7、将步骤5得到图形化的带金层的聚酰亚胺膜粘贴于步骤6预拉伸基板上：将图形化的带金层的聚酰亚胺膜中的支撑结构部分采用点胶方法粘贴于预拉伸基板上，静置24小时，即可实现支撑结构与预拉伸基板的固定，其中，点胶时使用的胶为ecoflex的A胶和B胶按照体积比为1:1的比例混合得到的；Step 7. Paste the patterned polyimide film with a gold layer obtained in step 5 on the pre-stretched substrate in step 6: apply glue to the support structure part of the patterned polyimide film with a gold layer Method Paste on the pre-stretched substrate and let it stand for 24 hours to realize the fixation of the support structure and the pre-stretched substrate. Among them, the glue used for dispensing is ecoflex A glue and B glue according to the volume ratio of 1:1 obtained by mixing the ratio;
步骤8、选取长度为1.2mm的一端为SMA母头、另一端为裸线的同轴电缆，将裸线的一端进行逐层剥离，同轴电缆的内导体的裸露部分1mm，介质层裸露2mm，外导体裸露30mm；将同轴电缆的外导体悬空，内导体采用点焊或银浆连接上述支撑结构表面的金属层；Step 8. Select a coaxial cable with a length of 1.2 mm, one end of which is an SMA female head and the other end is a bare wire, and one end of the bare wire is stripped layer by layer. The exposed part of the inner conductor of the coaxial cable is 1 mm, and the dielectric layer is exposed 2 mm. , the outer conductor is exposed for 30mm; the outer conductor of the coaxial cable is suspended in the air, and the inner conductor is connected to the metal layer on the surface of the above support structure by spot welding or silver paste;
步骤9、将预拉伸基板释放，图形化的金属/柔性介质基板拱起，即可得到本发明所述立式的柔性可拉伸天线。Step 9. Release the pre-stretched substrate, and arch the patterned metal/flexible dielectric substrate to obtain the vertical flexible and stretchable antenna of the present invention.
将实施例制得的立式的柔性可拉伸天线分别拉伸到0％、拉伸100％、拉伸200％后，测试其性能。图4为实施例的柔性可拉伸天线在不同拉伸程度下(拉伸0％、拉伸100％、拉伸200％)S11参数随频率变化的曲线图；由图4可知，当实施例的柔性可拉伸天线的拉伸程度为200％时，其使用的中心频率稳定在5.61GHz，且带宽不发生变化。而目前报道的可拉伸天线最大拉伸性为120％，且中心频率和带宽不稳定，因此，本发明提供的立式的柔性可拉伸天线在较大的拉伸强度下仍具有良好的稳定性，适用于可穿戴天线领域。The vertical flexible and stretchable antenna prepared in the embodiment was stretched to 0%, 100%, and 200% respectively, and then its performance was tested. Fig. 4 is the curve graph of the S11 parameter changing with frequency under different stretching degrees (stretching 0%, stretching 100%, stretching 200%) of the flexible stretchable antenna of the embodiment; As can be seen from Fig. 4, when the embodiment When the stretching degree of the flexible and stretchable antenna is 200%, the center frequency used is stable at 5.61GHz, and the bandwidth does not change. However, the maximum stretchability of the currently reported stretchable antenna is 120%, and the center frequency and bandwidth are unstable. Therefore, the vertical flexible stretchable antenna provided by the present invention still has good Stability, suitable for the field of wearable antennas.
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