WO2018010608A1 - 一种rfid标签 - Google Patents

一种rfid标签 Download PDF

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Publication number
WO2018010608A1
WO2018010608A1 PCT/CN2017/092302 CN2017092302W WO2018010608A1 WO 2018010608 A1 WO2018010608 A1 WO 2018010608A1 CN 2017092302 W CN2017092302 W CN 2017092302W WO 2018010608 A1 WO2018010608 A1 WO 2018010608A1
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WO
WIPO (PCT)
Prior art keywords
microstrip
microstrip line
pcb
feeding
unit
Prior art date
Application number
PCT/CN2017/092302
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English (en)
French (fr)
Inventor
谢广鹏
Original Assignee
谢广鹏
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 谢广鹏 filed Critical 谢广鹏
Publication of WO2018010608A1 publication Critical patent/WO2018010608A1/zh

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/0775—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for connecting the integrated circuit to the antenna
    • G06K19/07752—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for connecting the integrated circuit to the antenna using an interposer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07758—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
    • G06K19/0776—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag the adhering arrangement being a layer of adhesive, so that the record carrier can function as a sticker
    • 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
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines

Definitions

  • the present invention relates to an RFID tag.
  • Radio frequency identification (RFID) technology also known as electronic tag, radio frequency identification, is a type of radio signal that can identify a specific target and read and write related data without identifying the system and establishing a machine with a specific target. Or optical contact communication technology.
  • RFID Radio frequency identification
  • Commonly used passive RFIDs have low frequency (125k ⁇ 134.2K), high frequency (13.56Mhz), and ultra high frequency (860-960MHz).
  • RFID tag Antennas are an important part of RFID systems, and their performance will greatly affect the efficiency and quality of the entire RFID system. The main factors affecting the performance of the RFID antenna include the size of the antenna, the operating frequency band, the impedance and the gain. Therefore, if a better RFID antenna is needed, it should have better antenna performance. technical problem
  • An RFID tag comprising a rectangular PCB reflective plate, one side of the PCB reflective plate is provided with a microstrip antenna; and the other side of the PCB reflective plate
  • An RFID chip is provided, and the RFID chip is connected to the microstrip antenna signal
  • the microstrip antenna includes a first microstrip unit having a top-bottom symmetry and a same shape, and a second microstrip unit; and a first feed for feeding a first feed piece and a second feed piece are disposed on the same side of the PCB reflector, the first feed piece is for feeding connection with the first microstrip unit, and the second feed piece is for feeding And is connected to the second microstrip unit.
  • the first microstrip unit and the second microstrip unit each include a first microstrip line, a second microstrip line extending from the first microstrip line toward the center of the PCB reflector, and a second a third microstrip line extending from the microstrip line toward the center of the PCB reflector; one end of the first microstrip line, one end of the second microstrip line, and one end of the third microstrip line are aligned, the first The other end of the microstrip line, the other end of the second microstrip line, and the other end of the third microstrip line are stepped; the third microstrip line extends to the center of the PCB reflector with a plurality of arch bridges a ring-shaped arm; each of the radiation ring arms is provided with a decoupling window having a curved end and a rectangular end; the first microstrip line is provided with a plurality of rectangular pits on a side away from the center of the PCB reflector;
  • the first feeding piece is electrically connected to the first microstrip line of the first microstrip unit; the third microstrip line of the second feeding piece and the second microstrip unit is passed through a feeding thin Live connection.
  • the length from the decoupling window in the middle to the decoupling window on both sides is reduced in turn.
  • the first microstrip unit and the second microstrip unit are provided with an isolation trench, wherein the isolation trench is filled with silicon dioxide;
  • the periphery of the PCB reflector is also provided with a circle of isolated microstrip
  • the present invention has better RFID tag characteristics, a long distance, and excellent performance in antenna performance.
  • FIG. 2 is a schematic structural view of a microstrip antenna of the present invention
  • FIG. 3 is a schematic structural view of a first microstrip
  • FIG. 4 is a schematic structural view of a second microstrip
  • FIG. 6 is a frequency range test diagram of the microstrip antenna of the present invention under specific parameters; [0020] FIG. 7 is a direction view of a microstrip antenna of the present invention.
  • FIGS. 1 to 7 illustrate:
  • G1-PCB reflector G2-parasitic oscillator unit; G3-isolated microstrip; G4-isolation slot; G51-first feed; G52-second feed;
  • G61 first microstrip line; G62 - second microstrip line; G63 - third microstrip line; G64 - decoupling window; G65 - radiation ring arm; G66 - rectangular pit.
  • an RFID tag includes a rectangular PCB reflector G1, and a microstrip antenna is disposed on one side of the PCB reflector G1.
  • the other side of the PCB reflector G1 is provided with an RFID chip 2, and the RFID chip 2 is connected with a microstrip antenna signal.
  • the microstrip antenna includes a first microstrip unit having a vertically symmetrical shape and a same shape, and a second microstrip unit.
  • first feeding piece G 51 and a second feeding piece G52 for feeding There is a first feeding piece G 51 and a second feeding piece G52 for feeding, the first feeding piece G51 and the second feeding piece G52 are disposed on the same side of the PCB reflection plate G1, and the first feeding piece G51 is used for
  • the second microstrip unit is connected to the first microstrip unit, and the second feeding chip G52 is used for feeding the second microstrip unit.
  • the invention has better RFID tag characteristics, and the distance is far, in terms of antenna performance. Excellent performance.
  • the first microstrip unit and the second microstrip unit each include a first microstrip line G61, and from the first microstrip line G61 to the center of the PCB reflective plate G1.
  • a second microstrip line G6 extending from the second microstrip line G62, a third microstrip line G63 extending from the second microstrip line G62 to the center of the PCB reflection plate G1; one end of the first microstrip line G61 and the second microstrip line One end of G62 and one end of the third microstrip line G63 are aligned, and the other end of the first microstrip line G61, the other end of the second microstrip line G62, and the other end of the third microstrip line G63 are Stepped; the third microstrip line G63 extends to the center of the PCB reflector G1 to have a plurality of arch-shaped radiation ring arms G65; each of the radiation ring arms G65 is provided with a decoupling with one end curved
  • the microstrip antenna structure is finally determined by a microstrip circuit structure design of not less than 550 times and by no less than 500 simulation tests and parameter adjustments, and the microstrip antenna has a wide frequency range and good isolation. Degree and directionality as well as gain performance. As shown in Figure 5, the available bandwidth of the antenna bandwidth ranges from 1.7 GHz to 2.6 5 GHz; it basically meets the requirements of the communication band, and the gain is also high, and the average gain in the band is greater than 8.952 dB i; meeting the actual use requirements.
  • the number of decoupling windows G64 of each third microstrip line G63 is nine, and the length of the decoupling window G64 in the middle is the longest, from the middle.
  • the length of the coupling window G64 to the decoupling window G64 on both sides is sequentially reduced.
  • the overall antenna system has a bandwidth available from 1.6 GHz to 2.85 GHz; its gain is also significantly increased, the average gain in the band is greater than 9.4 dBi, which is about 0.3 dBi higher; and the isolation is in isolation, isolation in the figure band.
  • the performance is better, as shown in Figure 6, in S3 it can be seen that the isolation is greater than 25.5dB in the frequency range. Its directivity is also good, as shown in Figure 7, which is an omnidirectional antenna.
  • the number of rectangular pits G66 of each first microstrip line G61 is 29-35; an RFID tag according to this embodiment, each third micro The number of decoupling windows G64 with the line G63 is N, the width of the rectangular pit G66 is K, and the length L of the second microstrip line G62 is 9.5N*K.
  • the gain is more stable and the isolation is kept at a higher level.
  • the above parameters are obtained in continuous testing and adjustment. It is the most stable and best performance specific parameter.
  • the actual test node HFSS15 software calculates that the overall system antenna bandwidth can be frequency-modulated from 1.6GHz to 2.8GHz.
  • the average gain in the frequency band is greater than 9.35dBi, and the impedance is reduced.
  • the isolation is greater than 26dB in the frequency range.
  • an isolation trench G4 is disposed between the first microstrip unit and the second microstrip unit, and the isolation trench G4 is filled with silicon dioxide; Mutual coupling, enhanced isolation, and reduced standing wave ratio.
  • An RFID tag further includes a parasitic oscillator unit G2 disposed on a side of the PCB reflector G1 away from the first power feeding piece G51 and the second power feeding piece G52.
  • the parasitic oscillator unit G2 includes There is a first rectangular arm and a second rectangular arm extending from the first rectangular arm toward the side of the first microstrip unit; the parasitic oscillator unit G2G2 can effectively increase the bandwidth.
  • the periphery of the PCB reflector G1 is further provided with a ring of isolated microstrips G
  • the periphery of the PCB reflective plate G1 is further wrapped with a waterproof rubber 1, and the RFID chip 2 is disposed in the waterproof rubber 1; waterproof and dustproof, and the service life is improved.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

本发明公开了一种RFID标签，包括有矩形的PCB反射板，所述PCB反射板的一面上设有微带天线；所述PCB反射板的另一面设有RFID芯片，RFID芯片与微带天线信号连接，所述微带天线包括有上下对称、形状相同的第一微带单元以及第二微带单元；还包括有用于馈电的第一馈电片和第二馈电片，第一馈电片和第二馈电片设于PCB反射板同侧，第一馈电片用于与第一微带单元馈电连接，第二馈电片用于与第二微带单元馈电连接；通过合理的设置，本发明具有较好的RFID标签特性，距离远，在天线性能方面表现优异。

Description

技术领域
[0001] 本发明涉及一种 RFID标签。
背景技术
[0002] 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,因此， 如果需要一款较好的 RFID的天线， 就应该具有较好的天线性能。 技术问题
问题的解决方案
技术解决方案
[0003] 本发明的目的在于克服以上所述的缺点， 提供一种 RFID标签。
[0004] 为实现上述目的， 本发明的具体方案如下： 一种 RFID标签， 包括有矩形的 PCB 反射板， 所述 PCB反射板的一面上设有微带天线； 所述 PCB反射板的另一面设有 RFID芯片， RFID芯片与微带天线信号连接， 所述微带天线包括有上下对称、 形 状相同的第一微带单元以及第二微带单元； 还包括有用于馈电的第一馈电片和 第二馈电片， 第一馈电片和第二馈电片设于 PCB反射板同侧， 第一馈电片用于与 第一微带单元馈电连接， 第二馈电片用于与第二微带单元馈电连接。
[0005] 其中， 所述第一微带单元及第二微带单元均包括有第一微带线、 从第一微带线 向 PCB反射板中心延伸出的第二微带线、 从第二微带线向 PCB反射板中心延伸出 的第三微带线； 所述第一微带线的一端、 第二微带线的一端、 第三微带线的一 端三者对齐， 所述第一微带线的另一端、 第二微带线的另一端、 第三微带线的 另一端三者呈阶梯状； 所述第三微带线向 PCB反射板中心延伸出有多个拱桥形辐 射环臂； 每个辐射环臂内均设有一端为弧形另一端为矩形的去耦幵窗； 所述第 一微带线远离 PCB反射板中心的一侧设有多个矩形凹坑；
[0006] 所述第一馈电片与第一微带单元的第一微带线电性连接； 所述第二馈电片与第 二微带单元的第三微带线通过一馈电细带电性连接。
[0007] 其中， 每个第三微带线的去耦幵窗数量为 9个， 且中间的去耦幵窗的长度最长
， 从中间的去耦幵窗至两边的去耦幵窗的长度依次减少。
[0008] 其中， 每个第一微带线的矩形凹坑数量为 29-35个。
[0009] 其中， 每个第三微带线的去耦幵窗数量为 N个， 矩形凹坑的宽度设为 K， 则第 二微带线的长度 L=9.5N*K。
[0010] 其中， 所述第一微带单元以及第二微带单元中间设有一条隔离槽， 所述隔离槽 内填充有二氧化硅；
[0011] 其中， 还包括有设于 PCB反射板远离设有第一馈电片和第二馈电片的一侧的寄 生振子单元， 所述寄生振子单元包括有第一矩形臂和从第一矩形臂向第一微带 单元一侧延伸出的第二矩形臂；
[0012] 其中， PCB反射板的外围还设有一圈隔离微带圈；
[0013] 其中， 所述 PCB反射板外围还包裹有防水胶， 所述 RFID芯片设于防水胶内； 发明的有益效果
有益效果
[0014] 通过合理的设置， 本发明具有较好的 RFID标签特性， 距离远， 在天线性能方 面表现优异。
对附图的简要说明
附图说明
[0015] 图 1是本发明的侧视图；
[0016] 图 2是本发明的微带天线的结构示意图；
[0017] 图 3是第一微带的结构示意图；
[0018] 图 4是第二微带的结构示意图；
[0019] 图 5是本发明的微带天线的频率范围测试图；
[0020] 图 6是本发明的微带天线在特定参数下的频率范围测试图； [0021] 图 7是本发明的微带天线的方向图；
[0022] 图 1至图 7中的附图标记说明：
[0023] 1-防水胶； 2-RFID芯片；
[0024] G1-PCB反射板； G2-寄生振子单元； G3-隔离微带圈； G4-隔离槽； G51-第一馈 电片； G52-第二馈电片；
[0025] G61-第一微带线； G62-第二微带线； G63-第三微带线； G64-去耦幵窗； G65- 辐射环臂； G66-矩形凹坑。
本发明的实施方式
[0026] 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。
[0027] 如图 1至图 7所示， 本实施例所述的一种 RFID标签， 包括有矩形的 PCB反射板 G 1， 所述 PCB反射板 G1的一面上设有微带天线； 所述 PCB反射板 G1的另一面设有 RFID芯片 2， RFID芯片 2与微带天线信号连接， 所述微带天线包括有上下对称、 形状相同的第一微带单元以及第二微带单元； 还包括有用于馈电的第一馈电片 G 51和第二馈电片 G52， 第一馈电片 G51和第二馈电片 G52设于 PCB反射板 Gl同侧 ， 第一馈电片 G51用于与第一微带单元馈电连接， 第二馈电片 G52用于与第二微 带单元馈电连接； 通过合理的设置， 本发明具有较好的 RFID标签特性， 距离远 ， 在天线性能方面表现优异。
[0028] 本实施例所述的一种 RFID标签， 所述第一微带单元及第二微带单元均包括有 第一微带线 G61、 从第一微带线 G61向 PCB反射板 G1中心延伸出的第二微带线 G6 2、 从第二微带线 G62向 PCB反射板 G1中心延伸出的第三微带线 G63; 所述第一 微带线 G61的一端、 第二微带线 G62的一端、 第三微带线 G63的一端三者对齐， 所述第一微带线 G61的另一端、 第二微带线 G62的另一端、 第三微带线 G63的另 一端三者呈阶梯状； 所述第三微带线 G63向 PCB反射板 G1中心延伸出有多个拱桥 形辐射环臂 G65; 每个辐射环臂 G65内均设有一端为弧形另一端为矩形的去耦幵 窗 G64; 所述第一微带线 G61远离 PCB反射板 G1中心的一侧设有多个矩形凹坑 G6 6； 所述第一馈电片 G51与第一微带单元的第一微带线 G61电性连接； 所述第二馈 电片 G52与第二微带单元的第三微带线 G63通过一馈电细带电性连接。 通过不小 于 550次的微带电路结构设计， 以及通过不低于 500次仿真试验和参数调整下， 最终确定了上述微带天线结构， 该微带天线具备较宽的频率范围以及较好的隔 离度和方向性以及增益性能。 如图 5， 该天线带宽可用频率范围高达 1.7GHz至 2.6 5GHz; 基本满足通信频段的要求， 其增益也较高， 频带内平均增益大于 8.952dB i; 满足实际使用需要。
[0029] 本实施例所述的一种 RFID标签， 每个第三微带线 G63的去耦幵窗 G64数量为 9个 ， 且中间的去耦幵窗 G64的长度最长， 从中间的去耦幵窗 G64至两边的去耦幵窗 G64的长度依次减少。 当满足该数量的吋候， 其数据如图 6。 该整体天线系统带 宽可用频率范围达到了 1.6GHz至 2.85GHz; 其增益也明显增加， 频带内平均增益 大于 9.4dBi， 相比上升 0.3dBi左右； 另外其隔离度如果图频带内隔离度， 隔离度 表现较好， 如图 6， 在 S3中可以看出在频率范围内隔离度大于 25.5dB。 其方向性 也好， 如图 7所述， 其为全向性天线。
[0030] 本实施例所述的一种 RFID标签， 每个第一微带线 G61的矩形凹坑 G66数量为 29- 35个； 本实施例所述的一种 RFID标签， 每个第三微带线 G63的去耦幵窗 G64数量 为 N个， 矩形凹坑 G66的宽度设为 K， 则第二微带线 G62的长度 L=9.5N*K。 设置 上述参数限制后， 通过大量实验和仿真发现， 其增益更加稳定， 隔离度也保持 在较高的水平。 上述参数在不断测试和调整中得出， 其为最稳定和性能最佳的 具体参数， 具体实际测试结 HFSS15软件计算得出， 该整体系统天线带宽可用频 率范围在 1.6GHz至 2.8GHz内部调频； 频带内平均增益大于 9.35dBi， 阻抗降低； 在频率范围内隔离度大于 26dB ; 在实际测试中发现， 外界环境的变化， 如温度 、 磁场影响的变化在一定范围内， 例如温度在 10度上下的幅度变化， 采用上述 参数和特定数值吋， 其稳定性很强， 频段保持度较好。
[0031] 本实施例所述的一种 RFID标签， 所述第一微带单元以及第二微带单元中间设 有一条隔离槽 G4， 所述隔离槽 G4内填充有二氧化硅； 能有效降低互耦性， 增强 隔离度， 降低驻波比。
[0032] 本实施例所述的一种 RFID标签， 还包括有设于 PCB反射板 G1远离设有第一馈 电片 G51和第二馈电片 G52的一侧的寄生振子单元 G2， 所述寄生振子单元 G2包括 有第一矩形臂和从第一矩形臂向第一微带单元一侧延伸出的第二矩形臂； 寄生 振子单元 G2G2能有效增加带宽。
[0033] 本实施例所述的一种 RFID标签， PCB反射板 G1的外围还设有一圈隔离微带圈 G
3； 有效提高隔离度， 降低干扰性。
[0034] 本实施例所述的一种 RFID标签， 所述 PCB反射板 G1外围还包裹有防水胶 1， 所 述 RFID芯片 2设于防水胶 1内； 防水防尘， 提高使用寿命。
[0035] 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

权利要求书
[权利要求 1] 一种 RFID标签， 其特征在于： 包括有矩形的 PCB反射板 （G1) ， 所 述 PCB反射板 （G1) 的一面上设有微带天线； 所述 PCB反射板 （G1 ) 的另一面设有 RFID芯片 （2) ， RFID芯片 （2) 与微带天线信号连 接， 所述微带天线包括有上下对称、 形状相同的第一微带单元以及第 二微带单元； 还包括有用于馈电的第一馈电片 （G51) 和第二馈电片 (G52) ， 第一馈电片 （G51) 和第二馈电片 （G52) 设于 PCB反射板 (G1) 同侧， 第一馈电片 （G51) 用于与第一微带单元馈电连接， 第 二馈电片 （G52) 用于与第二微带单元馈电连接； 所述第一微带单元 及第二微带单元均包括有第一微带线 （G61) 、 从第一微带线 （G61 ) 向 PCB反射板 （G1) 中心延伸出的第二微带线 （G62) 、 从第二微 带线 （G62) 向 PCB反射板 （G1) 中心延伸出的第三微带线 （G63) ； 所述第一微带线 （G61) 的一端、 第二微带线 （G62) 的一端、 第 三微带线 （G63) 的一端三者对齐， 所述第一微带线 （G61) 的另一 端、 第二微带线 （G62) 的另一端、 第三微带线 （G63) 的另一端三 者呈阶梯状； 所述第三微带线 （G63) 向 PCB反射板 （G1) 中心延伸 出有多个拱桥形辐射环臂 （G65) ； 每个辐射环臂 （G65) 内均设有 一端为弧形另一端为矩形的去耦幵窗 （G64) ； 所述第一微带线 （G6 1) 远离 PCB反射板 （G1) 中心的一侧设有多个矩形凹坑 （G66) ； 所述第一馈电片 （G51) 与第一微带单元的第一微带线 （G61) 电性 连接； 所述第二馈电片 （G52) 与第二微带单元的第三微带线 （G63 ) 通过一馈电细带电性连接； 每个第三微带线 （G63) 的去耦幵窗 （ G64) 数量为 9个， 且中间的去耦幵窗 （G64) 的长度最长， 从中间的 去耦幵窗 （G64) 至两边的去耦幵窗 （G64) 的长度依次减少。
[权利要求 2] 根据权利要求 1所述的一种 RFID标签， 其特征在于： 每个第一微带线
(G61) 的矩形凹坑 （G66) 数量为 29-35个。
[权利要求 3] 根据权利要求 1所述的一种 RFID标签， 其特征在于： 设每个第三微带 线 （G63) 的去耦幵窗 （G64) 数量为 N个， 矩形凹坑 （G66) 的宽度 设为 K， 则第二微带线 （G62) 的长度 L=9.5N*K。
PCT/CN2017/092302 2016-07-11 2017-07-08 一种rfid标签 WO2018010608A1 (zh)

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