WO2016197912A1 - 插合耦合电容rfid标签天线 - Google Patents

插合耦合电容rfid标签天线 Download PDF

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Publication number
WO2016197912A1
WO2016197912A1 PCT/CN2016/085115 CN2016085115W WO2016197912A1 WO 2016197912 A1 WO2016197912 A1 WO 2016197912A1 CN 2016085115 W CN2016085115 W CN 2016085115W WO 2016197912 A1 WO2016197912 A1 WO 2016197912A1
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Prior art keywords
antenna
gain
rfid tag
plug
coupling
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PCT/CN2016/085115
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English (en)
French (fr)
Inventor
张秀丽
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张秀丽
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Application filed by 张秀丽 filed Critical 张秀丽
Priority to CN201680023708.6A priority Critical patent/CN107534210B/zh
Publication of WO2016197912A1 publication Critical patent/WO2016197912A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems

Definitions

  • the invention relates to a plug-coupled capacitive RFID tag antenna.
  • RFID Radio Frequency Identification
  • electronic tag radio frequency identification
  • RFID Radio Frequency Identification
  • Optical contact communication technology Commonly used passive RFIDs have low frequency (125k ⁇ 134.2K), high frequency (13.56Mhz), ultra high frequency (860-960MHz).
  • the RFID tag antenna will greatly affect the efficiency and quality of the entire RFID system. The main factors affecting the performance of RFID antennas include antenna size, operating frequency band, impedance and gain. Commonly used RFID antennas often use a bent line dipole form, which is convenient for reducing antenna size and antenna processing.
  • This type of antenna pattern is perpendicular to the antenna surface, so it is attached to the vertical outer surface of the target object when used; when the length of the object changes, the antenna is required to change, and the gain also changes, so it needs to be designed.
  • An antenna that can change according to the length, in addition, its antenna performance also needs to meet the requirements.
  • a plug-coupled capacitive RFID tag antenna includes a first antenna and a second antenna, and a distance between the first antenna and the second antenna is telescopically adjustable.
  • the first antenna includes an elongated first body, one end of the first body is provided with a first gain rod, and the free end of the first gain rod is provided with an arc-shaped first gain antenna, and two a coupling groove, the two coupling groove openings are opposite to the other end of the first body, the two coupling grooves are disposed in parallel in the first body, and the upper and lower sides of each coupling groove are provided with serrated zigzag grooves;
  • the second antenna includes a second body, the first body has a length greater than the second body, and the second body has a second gain rod at one end thereof, and the free end of the second gain rod is provided with an arc shape.
  • the second gain antenna further includes two coupling strips disposed on the other end of the second body and engaging with the coupling grooves.
  • the two coupling strips are disposed in parallel, and the upper and lower sides of each of the coupling strips are provided with a sawtooth slot.
  • a matching serrated serration protrusion the serration protrusion being located in the serration groove when mated;
  • the utility model further includes a T-shaped adjusting rod, wherein the second body is provided with an opening corresponding to the opening of the first body, and the horizontal section of the T-shaped adjusting rod is located in the adjusting recess;
  • the distance between the free end of the coupling strip and the inner side of the coupling groove is L
  • the horizontal distance between the free end of the horizontal section of the T-shaped adjustment rod and the inner side of the adjustment recess is M
  • the L M*3.75.
  • one end of the first body is an arc surface, and the arc is the same as the arc of the first gain antenna.
  • one end of the second body is a curved surface, and the arc is the same as the arc of the second gain antenna.
  • the first gain antenna and the second gain antenna have the same arc, both of which are 60°-80°.
  • a side of the first gain antenna is further provided with a third gain rod, and a free end of the third gain rod is provided with a third gain antenna.
  • the arc of the third gain rod is the same as the arc of the first gain rod.
  • the height of the first body is less than 10 cm.
  • the first antenna is provided with an elongated isolation groove
  • the second antenna and the first antenna are provided with a frequency increase gap.
  • the invention has the following advantages: 1.
  • the reading distance is long, and the reading distance can be 11-13 m after being tested.
  • the reading distance of ordinary RFID tag antennas is less than 10m.
  • stretchable that is, the length is adjustable, it can be used for a package with a certain width, but the length is not fixed, has great practical value.
  • Various antennas have good performance, small standing wave ratio, low return loss, high gain and omnidirectionality. It has higher performance when used at a frequency of ultra high frequency (860-960 MHz), especially around 925 MHz.
  • Figure 1 is a schematic view of the present invention
  • Figure 2 is a schematic view of the elongated state of the present invention.
  • Figure 3 is a schematic view of a first antenna of the present invention.
  • Figure 4 is a schematic view of a second antenna of the present invention.
  • FIG. 5 is a schematic illustration of an RFID tag made using the present invention.
  • Figure 6 is a graph of impedance test data of the present invention.
  • Figure 7 is a graph of return loss test data of the present invention.
  • Figure 8 is a diagram showing the directional test data of the present invention.
  • 2-second antenna 21-coupling strip; 22-toothed protrusion; 23-second gain rod; 24-second second gain antenna; 25-adjusting notch;
  • a plug-coupled capacitive RFID tag antenna includes a first antenna 1 and a second antenna 2, and between the first antenna 1 and the second antenna 2 The distance is adjustable.
  • the RFID tag manufactured by the same comprises a substrate 6 and a plug-in coupling capacitor RFID tag antenna disposed on the substrate 6.
  • the second antenna 2 is provided with a dielectric plate 4, and the dielectric plate 4 is provided with a tag chip 5, The tag chip 5 is electrically connected to the antenna.
  • the first antenna 1 includes an elongated first body, and one end of the first body is provided with a first gain rod 13 and the first gain rod.
  • the free end of 13 is provided with a curved first gain antenna 14 and further includes two coupling slots 11 which are open toward the other end of the first body, and the two coupling slots 11 are arranged in parallel
  • the upper and lower sides of each of the coupling grooves 11 are provided with serrations
  • the second antenna 2 includes a second body, the first body has a length greater than the second body, and one end of the second body is provided with a second gain rod 23, and the second gain rod
  • the second end of the second body is provided with two arc-shaped second gain antennas 24, and further includes two coupling strips 21 disposed at the other end of the second body, and the two coupling strips 21 are arranged in parallel.
  • Each of the upper and lower sides of each of the coupling strips 21 is provided with a serrated serrated protrusion 22 that cooperates with the serration groove 12.
  • the coupling capacitor RFID tag antenna further includes a T-shaped adjustment rod 3, and the second body is provided with an opening 56 facing the first body, and the horizontal section of the T-shaped adjustment rod 3 is located in the adjustment recess 25
  • the program achieves a long reading distance by the above features, and the reading distance can be 11-13 m after testing.
  • the reading distance of ordinary RFID tag antennas is less than 10m.
  • it can be stretched; that is, the length is adjustable, and it can be used for a package having a substantially constant width, but the length is not fixed, and has great use value, and is attached on different packages, and in addition, theoretically, it can grow indefinitely.
  • its antenna performance is good, the standing wave ratio is small, the return loss is low, the gain is high, and it is omnidirectional. It has higher performance when used at frequencies around 925MHz.
  • one end of the first body is a curved surface, and the arc is the same as the arc of the first gain antenna 14. With such a setting, the gain performance is further improved, the return loss is reduced, the omnidirectionality of the radiation is increased, and the optimization result is better.
  • one end of the second body is a curved surface, and the arc is the same as the arc of the second gain antenna 24. The same arc can reduce the formation of standing waves between the two antennas, reduce wave interference, and reduce the standing wave ratio.
  • the first gain antenna 14 and the second gain antenna 24 have the same arc, both of which are 60°-80°. Through the simulation and actual experiments, the performance of the radian antenna is the best.
  • a plug-in coupling capacitor RFID tag antenna according to this embodiment, a third gain lever 15 is further disposed on one side of the first gain antenna 14, and a third gain is disposed on a free end of the third gain lever 15
  • the antenna 16 is a plug-coupled capacitive RFID tag antenna according to the embodiment.
  • the arc of the third gain lever 15 is the same as the arc of the first gain bar 13; similarly, the setting further improves the gain performance. And reduce the return loss, increase the omnidirectionality of the radiation, and the optimization result is better.
  • a plug-coupled capacitive RFID tag antenna has a height of the first body of less than 10 cm.
  • the plug-in coupling capacitor RFID tag antenna of the embodiment is characterized in that the first antenna 1 is provided with an elongated isolation slot 17 , and the isolation slot 17 is located between the two coupling slots 11 .
  • the up-sampling gap 18 increases the isolation and reduces the formation of standing waves, making the standing wave ratio close to one.
  • the antenna of this scheme also has a good performance in terms of omnidirectionality. As shown in Fig. 8, it has excellent performance in omnidirectionality and has a 360 degree dead angle equidistance omnidirectionality. As shown in Figure 7, the return loss performance is outstanding, especially at 925MHz, the minimum return loss is -65dB, and the return loss is kept below -10dB in the entire high frequency band, and the average level is higher than other similar antenna levels.
  • the effective distance is 11-13m under different tensile lengths.
  • the test results are as follows:
  • the input impedance of the antenna test is shown in Fig. 6.
  • the measured impedance is 11+144j ohms at 925MHz, which is conjugate matched with the impedance 11+143j of the chip Monza4Dura.
  • the label achieves optimal results at 925MHz.

Abstract

本发明公开了一种插合耦合电容RFID标签天线，包括有第一天线和第二天线，所述第一天线与第二天线之间距离可伸缩调节；其阅读距离长，经测试其阅读距离可达11-13m；可拉伸，即长度可调，其可用于宽度基本一定，但长度不定的成套包装上，具有极大的实用价值、各项天线性能好、驻波比小、回波损耗低、增益高且具备全向性。

Description

插合耦合电容RFID标签天线 技术领域
本发明涉及一种插合耦合电容RFID标签天线。
背景技术
目前，射频识别即RFID(Radio Frequency Identification)技术，又称电子标签、无线射频识别，是一种可通过无线电讯号识别特定目标并读写相关数据，而无需识别系统与特定目标之间建立机械或光学接触的通信技术。常用的无源RFID有低频(125k～134.2K)、高频(13.56Mhz)、超高频(860-960MHz)。RFID标签天线作为RFID系统的重要组成部分，它的性能将极大的影响整个RFID系统的效率与质量。影响RFID天线性能的主要因素包括天线的尺寸、工作频段、阻抗及增益等。一般常用的RFID天线常采用弯折线型偶极子形式，便于缩减天线尺寸及天线加工。该类型天线方向图为垂直于天线面，因此使用时贴附于目标物体垂直外表面；当物体的长度随之变化时，要求天线也随之变化，其增益也随之改变，因此需要设计出一款能够根据长度而改变的天线，另外，其各项天线性能也需要满足要求。
发明内容
本发明的目的在于克服以上所述的缺点，提供一种插合耦合电容RFID标签天线。
为实现上述目的，本发明的具体方案如下：一种插合耦合电容RFID标签天线，包括有第一天线和第二天线，所述第一天线与第二天线之间距离可伸缩调节。
第一天线包括有长条形第一本体，所述第一本体的一端设有第一增益杆，所述第一增益杆的自由端设有一弧形的第一增益天线，还包括有两个耦合槽，所述两个耦合槽开口朝向第一本体的另一端，所述两个耦合槽平行设置于第一本体内，所述每个耦合槽的上下两边均设有锯齿状的锯齿槽；所述第二天线的包括有一第二本体，所述第一本体的长度大于第二本体，所述第二本体的一端设有第二增益杆，第二增益杆的自由端设有一弧形的第二增益天线，还包括有两个设于第二本体另一端的与耦合槽配合的耦合条，所述两个耦合条平行设置，所述每个耦合条的上下两边均设有与锯齿槽配合的锯齿状的锯齿凸起，配合时，所述锯齿凸起位于锯齿槽内；
还包括有T字形调节杆，所述第二本体内设有一开口朝向第一本体的调节凹口，所述T字形调节杆的水平段位于调节凹口内；
设耦合条的自由端与耦合槽的内里面的距离为L，设T字形调节杆的水平段的自由端与调节凹口的内里面的水平距离为M，所述L＝M*3.75。
其中，所述第一本体的一端为弧形面，且弧度与第一增益天线的弧度相同。
其中，所述第二本体的一端为弧形面，且弧度与第二增益天线的弧度相同。
其中，所述第一增益天线与第二增益天线的弧度相同，均为60°-80°。
其中，所述第一增益天线的一侧还设有第三增益杆，所述第三增益杆的自由端设有第三增益天线。
其中，所述第三增益杆的弧度与第一增益杆的弧度大小相同。
其中，所述第一本体的高度在小于10cm。
其中，所述所述第一天线上设有长条形的隔离槽，
其中，所述第二天线与第一天线上设有增频缺口。
本发明的有益效果：1、阅读距离长，经测试其阅读距离可达11-13m。普通RFID标签天线的阅读距离均小于10m。2、可拉伸；即长度可调，其可用于宽度基本一定，但长度不定的成套包装上，具有极大的实用价值。3、各项天线性能好、驻波比小、回波损耗低、增益高且具备全向性。其在超高频即(860-960MHz)尤其是925MHz左右的频率使用时性能较高。
附图说明
图1是本发明的示意图；
图2是本发明的拉长后的示意图；
图3是本发明的第一天线示意图；
图4是本发明的第二天线示意图；
图5是利用本发明制作的RFID标签的示意图；
图6是本发明的阻抗测试数据图；
图7是本发明的回波损耗测试数据图；
图8是本发明的方向性测试数据图；
图1至图8中的附图标记说明：
1-第一天线；11-耦合槽；12-锯齿槽；13-第一增益杆；14-第一增益天线；15-第三增益杆；16-第三增益天线；17-隔离槽；18-增频缺口；
2-第二天线；21-耦合条；22-锯齿凸起；23-第二增益杆；24-第二增益天线；25-调节凹口；
3-T字形调节杆；
4-介质板；
5-标签芯片；
6-基板。
具体实施方式
下面结合附图和具体实施例对本发明作进一步详细的说明，并不是把本发明的实施范围局限于此。
如图1至图8所示，本实施例所述的一种插合耦合电容RFID标签天线，包括有第一天线1和第二天线2，所述第一天线1与第二天线2之间距离可伸缩调节。利用其制作的RFID标签包括基板6，以及设于基板6上的插合耦合电容RFID标签天线，所述第二天线2上设有介质板4，介质板4上设有标签芯片5，所述标签芯片5与天线电性连接。
本实施例所述的一种插合耦合电容RFID标签天线，第一天线1包括有长条形第一本体，所述第一本体的一端设有第一增益杆13，所述第一增益杆13的自由端设有一弧形的第一增益天线14，还包括有两个耦合槽11，所述两个耦合槽11开口朝向第一本体的另一端，所述两个耦合槽11平行设置于第一本体内，所述每个耦合槽11的上下两边均设有锯齿 状的锯齿槽12；所述第二天线2的包括有一第二本体，所述第一本体的长度大于第二本体，所述第二本体的一端设有第二增益杆23，第二增益杆23的自由端设有一弧形的第二增益天线24，还包括有两个设于第二本体另一端的与耦合槽11配合的耦合条21，所述两个耦合条21平行设置，所述每个耦合条21的上下两边均设有与锯齿槽12配合的锯齿状的锯齿凸起22，配合时，所述锯齿凸起22位于锯齿槽12内；本实施例所述的一种插合耦合电容RFID标签天线，还包括有T字形调节杆3，所述第二本体内设有一开口朝向第一本体的调节凹口25，所述T字形调节杆3的水平段位于调节凹口25内；本实施例所述的一种插合耦合电容RFID标签天线，设耦合条21的自由端与耦合槽11的内里面的距离为L，设T字形调节杆3的水平段的自由端与调节凹口25的内里面的水平距离为M，所述L＝M*3.75。
本方案通过上述特征实现了阅读距离长，经测试其阅读距离可达11-13m。普通RFID标签天线的阅读距离均小于10m。另外，其可拉伸；即长度可调，其可用于宽度基本一定，但长度不定的成套包装上，具有极大的使用价值，在不同包装上实现帖附，另外，理论上可以无限增长。最后，其各项天线性能好、驻波比小、回波损耗低、增益高且具备全向性。；其在925MHz左右的频率使用时性能较高。本实施例所述的一种插合耦合电容RFID标签天线，所述第一本体的一端为弧形面，且弧度与第一增益天线14的弧度相同。如此设置，进一步提高了增益性能，且降低回波损耗，增加辐射全向性，优化结果较佳。本实施例所述的一种插合耦合电容RFID标签天线，所述第二本体的一端为弧形面，且弧度与第二增益天线24的弧度相同。弧度相同可以减少两个天线之间驻波形成，减少波干涉，降低驻波比。本实施例所述的一种插合耦合电容RFID标签天线，所述第一增益天线14与第二增益天线24的弧度相同，均为60°-80°。通过仿真以及实际实验，该弧度天线的各项性能最佳。
本实施例所述的一种插合耦合电容RFID标签天线，所述第一增益天线14的一侧还设有第三增益杆15，所述第三增益杆15的自由端设有第三增益天线16；本实施例所述的一种插合耦合电容RFID标签天线，所述第三增益杆15的弧度与第一增益杆13的弧度大小相同；同理，如此设置，进一步提高了增益性能，且降低回波损耗，增加辐射全向性，优化结果较佳。
本实施例所述的一种插合耦合电容RFID标签天线，所述第一本体的高度在小于10cm。本实施例所述的一种插合耦合电容RFID标签天线，所述所述第一天线1上设有长条形的隔离槽17，所述隔离槽17位于两条耦合槽11之间，本实施例所述的一种插合耦合电容RFID标签天线，所述第二天线2靠近第一天线1的一面的两角处以及第一天线1靠近第二天线2的一面的两角处设有增频缺口18。增频缺口18能增加隔离度，减少驻波形成，使得驻波比接近1。本方案的天线在全向性方面也具有较好的表现，如图8所述，在全向性方面其表现优异，具有360度无死角等距全向性。如图7所示，其回波损耗性能突出，尤其在925MHz时回波损耗最小值达到-65dB，在整个高频段的回波损耗均保持在-10dB以下，水平均超过其他同类天线水平。
经测设，其在不同拉伸长度下使用有效距离均达到11-13m。测试结果如下表：
Figure PCTCN2016085115-appb-000001
另外，该天线测试的输入阻抗如图6所示，所测得阻抗在925MHz时为11+144j欧姆，与芯片Monza4Dura的阻抗11+143j达到共轭匹配。标签在925MHz时可以达到最优效果。
以上所述仅是本发明的一个较佳实施例，故凡依本发明专利申请范围所述的构造、特征及原理所做的等效变化或修饰，包含在本发明专利申请的保护范围内。

Claims (8)

  1. 一种插合耦合电容RFID标签天线，其特征在于：包括有第一天线(1)和第二天线(2)，所述第一天线(1)与第二天线(2)之间距离可伸缩调节。
  2. 根据权利要求1所述的一种插合耦合电容RFID标签天线，其特征在于：第一天线(1)包括有长条形第一本体，所述第一本体的一端设有第一增益杆(13)，所述第一增益杆(13)的自由端设有一弧形的第一增益天线(14)，还包括有两个耦合槽(11)，所述两个耦合槽(11)开口朝向第一本体的另一端，所述两个耦合槽(11)平行设置于第一本体内，所述每个耦合槽(11)的上下两边均设有锯齿状的锯齿槽(12)；所述第二天线(2)的包括有一第二本体，所述第一本体的长度大于第二本体，所述第二本体的一端设有第二增益杆(23)，第二增益杆(23)的自由端设有一弧形的第二增益天线(24)，还包括有两个设于第二本体另一端的与耦合槽(11)配合的耦合条(21)，所述两个耦合条(21)平行设置，所述每个耦合条(21)的上下两边均设有与锯齿槽(12)配合的锯齿状的锯齿凸起(22)，配合时，所述锯齿凸起(22)位于锯齿槽(12)内；
    还包括有T字形调节杆(3)，所述第二本体内设有一开口朝向第一本体的调节凹口(25)，所述T字形调节杆(3)的水平段位于调节凹口(25)内；
    设耦合条(21)的自由端与耦合槽(11)的内里面的距离为L，设T字形调节杆(3)的水平段的自由端与调节凹口(25)的内里面的水平距离为M，所述L＝M*3.75。
  3. 根据权利要求2所述的一种插合耦合电容RFID标签天线，其特征在于：所述第一本体的一端为弧形面，且弧度与第一增益天线(14)的弧度相同。
  4. 根据权利要求2所述的一种插合耦合电容RFID标签天线，其特征在于：所述第二本体的一端为弧形面，且弧度与第二增益天线(24)的弧度相同。
  5. 根据权利要求2所述的一种插合耦合电容RFID标签天线，其特征在于：所述第一增益天线(14)与第二增益天线(24)的弧度相同，均为60°-80°。
  6. 根据权利要求2所述的一种插合耦合电容RFID标签天线，其特征在于：所述第一增益天线(14)的一侧还设有第三增益杆(15)，所述第三增益杆(15)的自由端设有第三增益天线(16)。
  7. 根据权利要求6所述的一种插合耦合电容RFID标签天线，其特征在于：所述第三增益杆(15)的弧度与第一增益杆(13)的弧度大小相同。
  8. 根据权利要求2所述的一种插合耦合电容RFID标签天线，其特征在于：所述第一本体的高度在小于10cm。
PCT/CN2016/085115 2015-06-11 2016-06-07 插合耦合电容rfid标签天线 WO2016197912A1 (zh)

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