WO2012167740A1 - 具有补偿结构的rfid标签天线、rfid标签及系统 - Google Patents

具有补偿结构的rfid标签天线、rfid标签及系统 Download PDF

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Publication number
WO2012167740A1
WO2012167740A1 PCT/CN2012/076633 CN2012076633W WO2012167740A1 WO 2012167740 A1 WO2012167740 A1 WO 2012167740A1 CN 2012076633 W CN2012076633 W CN 2012076633W WO 2012167740 A1 WO2012167740 A1 WO 2012167740A1
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WO
WIPO (PCT)
Prior art keywords
conductor
rfid tag
tag antenna
dielectric substrate
compensation
Prior art date
Application number
PCT/CN2012/076633
Other languages
English (en)
French (fr)
Inventor
刘智佳
Original Assignee
Liu Zhijia
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 Liu Zhijia filed Critical Liu Zhijia
Priority to EP12796581.2A priority Critical patent/EP2720318B1/en
Priority to US14/123,682 priority patent/US9104953B2/en
Publication of WO2012167740A1 publication Critical patent/WO2012167740A1/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
    • 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
    • G06K19/07771—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 the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object
    • 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
    • G06K19/07773—Antenna details
    • G06K19/07786—Antenna details the antenna being of the HF type, such as a dipole
    • 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
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • 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

Definitions

  • the present invention relates to RFID tag antennas, RFID tags and systems, and more particularly to RFID tag antennas, RFID tags and systems suitable for wireless communication on metal objects. Background technique
  • RFID Radio Frequency Identification
  • the RFID tag in the above RFID system not only needs to meet the requirements of miniaturization, but also has reliable working performance and a long communication distance.
  • the RFID tag since the RFID tag is mounted on various objects, the antenna performance and communication distance are changed depending on the object to be mounted. In particular, when the mounting object is a metal surface, the reliability of work performance is deteriorated, and the communication distance is remarkably lowered.
  • the invention of Patent Document 1 provides miniaturization of a microstrip antenna having a metal body on the ground.
  • Radio frequency identification tag FIG. 10 shows the radio frequency identification tag.
  • the microstrip patch antenna of the radio frequency identification tag includes a power supply portion 31 and a radiation portion 30 which are connected to each other, and the radiation portion 30 has at least a port 32 on both sides.
  • the effective radiating area of the microstrip antenna has a great influence on its gain, which directly affects the communication distance of the RFID tag and the bandwidth of the communication frequency.
  • the effective radiation area is larger, and the communication distance of the RFID tag is longer, and the communication frequency bandwidth is also improved.
  • Patent Document 1 CN101728647A Summary of the invention
  • the present invention has been made in view of the above problems, and an object thereof is to provide an RFID tag antenna, an RFID tag, and a system having a compensation structure, the RFID tag antenna and the RFID without changing the overall size of the tag and the materials of the respective components. Labels and systems increase communication distance and increase bandwidth performance.
  • the present invention provides an RFID tag antenna having a compensation structure, comprising: a dielectric substrate having a rectangular parallelepiped shape; and a conductor ground portion disposed on the upper and lower sides of the dielectric substrate a main surface of the surface covering the entire surface of the one main surface; a conductor radiating portion disposed on the other main surface of the upper and lower main surfaces of the dielectric substrate, and covering the other main surface a feeding portion disposed on one side of the dielectric substrate and having a first feed line and a second feed line, wherein the first feed line and the second feed line are electrically connected to the conductor ground portion and the conductor radiating portion, respectively;
  • the conductor compensating portion is provided on at least one side surface of the dielectric substrate, and the conductor ground portion and the conductor radiating portion are electrically connected via the conductor compensating portion.
  • the power feeding portion and the conductor compensation portion function as an impedance matching network of the RFID tag antenna in the prior art and a structure for adjusting the resonance frequency, and the power feeding portion and the conductor compensation portion are located.
  • the end face of the RFID tag antenna enables the conductor radiating portion and the conductor ground portion to cover the entire faces of the two main faces of the dielectric substrate, thereby improving the communication distance without changing the overall size of the tag and the material of each component. Can improve bandwidth performance.
  • the end portion of the conductor compensating portion on the side closer to the power feeding portion is located at a position corresponding to the resonance frequency of the antenna.
  • the electrical length of the RFID tag antenna is adjusted to a desired length by changing the position of the end portion of the conductor compensating portion close to the feeding portion side, thereby realizing the desired resonant frequency of the RFID tag antenna.
  • a conductor compensating portion is provided on each of two side faces parallel to the longitudinal direction of the dielectric substrate.
  • the two conductor compensation portions described above are symmetrical to each other and use the same conductive material.
  • the two conductor compensation portions are symmetrical to each other means that the positions of the two conductor compensation portions on the two side faces are symmetrical and identical in shape, that is, the distance between the two conductor compensation portions with respect to the two side faces The planes which are identical and parallel to the above two sides are symmetrical to each other.
  • the current distribution on the conductor land portion and the conductor radiation portion of the RFID tag antenna can be made more uniform, thereby further increasing the communication distance and increasing the bandwidth. performance.
  • the conductor compensation portion has an upper portion Lower symmetrical shape.
  • the first feed line and the second feed line are symmetrical downward.
  • the conductor ground portion and the conductor radiating portion are vertically symmetrical, and the conductor compensating portion has a vertically symmetrical shape, and the first feeding line and the second feeding line are vertically symmetrical, that is, the entire RFID tag antenna has a vertically symmetrical structure, so in the RFID
  • the RFID tag antenna does not need to distinguish between the forward and reverse directions during the production process and during use, which is advantageous for improving production efficiency and ease of use.
  • the first feed line and the second feed line are downwardly symmetrical, and the first feed line and the second feed line respectively have left end directions with respect to an end surface of the feed portion.
  • the centerline is symmetric in shape.
  • the first feed line and the second feed line have a width corresponding to a resonance frequency of the antenna in a width direction of the dielectric substrate.
  • the conductor compensation portion In the RFID tag antenna having the compensation structure of the present invention, preferably, an end portion of the conductor compensation portion that is closer to the power feeding portion side and a side surface of the conductor compensation portion that is away from the power feeding portion side
  • the distance 1 between the ends satisfies the relationship H + L / 2, where H is the height of the dielectric substrate, and L is the length of the dielectric substrate.
  • the conductor compensation portion provided on the side surface of the dielectric substrate can compensate for the electrical length loss caused by the size of the tag antenna, and the RFID tag can be further miniaturized.
  • the distance 1 between the end portion of the conductor compensating portion on the side close to the feeding portion and the end portion of the side where the conductor compensating portion is located away from the feeding portion satisfies the relationship H+L/2 (wherein When H is the height of the dielectric substrate and L is the length of the dielectric substrate, the electric length compensation effect by the conductor compensation portion is more effective.
  • one of the two side faces parallel to each other in the longitudinal direction of the dielectric substrate is provided on at least one end surface of the dielectric substrate in the longitudinal direction.
  • the conductor compensation portion is provided on the same side surface or the same end surface as the power feeding portion.
  • the conductor compensating portion is at least one metal strip.
  • the conductor compensating portion has a width of less than 1 cm.
  • the electrical length of the RFID tag antenna can be adjusted to a desired length, thereby enabling the RFID tag antenna to achieve a desired resonant frequency.
  • the conductor ground portion, the conductor radiating portion, the first feed line, the second feed line, and the conductor compensating portion are formed of a high conductivity powder.
  • the present invention also provides an RFID tag characterized by having: An RFID tag antenna having a compensation structure; a chip electrically connected to the first feed line and the second feed line, respectively.
  • the conductor compensation unit has a width capable of impedance matching the RFID tag antenna and the chip.
  • the present invention also provides an RFID system characterized by comprising: an RFID tag as described above; a reader or reader/writer that wirelessly communicates with the RFID tag.
  • the RFID tag antenna, the RFID tag, and the system can increase the communication distance and improve the bandwidth performance without changing the overall size of the tag and the material of each component.
  • the RFID tag and the antenna can be further miniaturized while maintaining the communication distance and bandwidth performance.
  • FIG. 1 is a schematic diagram showing an RFID system of the present invention.
  • Fig. 2 is a perspective view for explaining the RFID tag of the present invention.
  • Figure 3 is a bottom plan view of the RFID tag of the present invention.
  • Figure 4 is a plan view of the RFID tag of the present invention.
  • Figure 5 is a left side view of the RFID tag of the present invention.
  • Fig. 6 is a schematic view showing the electrical length of the RFID tag antenna of the present invention.
  • Fig. 7 is a view showing the electrical length when the RFID tag antenna of the present invention does not have a conductor compensating portion.
  • Fig. 8 is a schematic view for explaining the relationship between the width of the conductor compensating portion of the RFID tag antenna of the present invention and the electrical length of the RFID tag antenna.
  • Fig. 9 is a schematic view for explaining the relationship between the width of the power feeding portion of the RFID tag antenna of the present invention and the electrical length of the RFID tag antenna.
  • Figure 10 is a schematic diagram showing a prior art RFID tag.
  • Figure 11 is a schematic side view showing a modification of the present invention. detailed description
  • Fig. 1 is a schematic view showing an RFID system of the present invention
  • Fig. 2 is a perspective view for explaining an RFID tag of the present invention.
  • the RFID system 100 of the present invention includes: The RFID tag 1 is mounted on a metal object M such as a steel product, a mold, and a manufacturing device; and a reader/writer RW that reads and writes information in a non-contact manner with the RFID tag 1.
  • a metal object M such as a steel product, a mold, and a manufacturing device
  • a reader/writer RW that reads and writes information in a non-contact manner with the RFID tag 1.
  • the RFID system 100 performs picking of the object by the portable reader/writer RW.
  • the finished product is inspected, or is managed by the RFID system 100 when the RFID tag 1 is mounted on a mold or manufacturing equipment and is inspected or physically confirmed.
  • the reader/writer RW can utilize the portable reader/writer RW, and the fixed reader/writer RW can also be utilized, and the reader/writer RW can also be a reader.
  • the RFID tag 1 has a conductor ground portion 2, a dielectric substrate 3, a conductor radiating portion 4, a power feeding portion 5, a chip 6, and a conductor compensating portion 7.
  • Figure 3 is a bottom plan view of the RFID tag 1 of the present invention.
  • the conductor land portion 2 is provided on one main surface of the dielectric substrate 3 and covers the entire surface of the main surface.
  • the dielectric substrate 3 is formed of a ceramic dielectric or a synthetic resin material such as FR4, polytetrafluoroethylene, polyethylene, polyethylene terephthalate (PET), polypropylene, or polyimide, and has a thin plate shape. The cuboid.
  • the dielectric substrate 3 is preferably a ceramic dielectric.
  • Figure 4 is a plan view of the RFID tag 1 of the present invention.
  • the conductor radiating portion 4 is provided on the other main surface of the dielectric substrate 3 and covers the entire surface of the other main surface.
  • Figure 5 is a left side view of the RFID tag 1 of the present invention.
  • the power feeding portion 5 is provided on one end surface of the dielectric substrate 3 in the longitudinal direction thereof, and has a first feed line 51 and a second feed line 52, and the first feed line 51 and the second feed line 52 are respectively The conductor land portion 2 and the conductor radiating portion 4 are electrically connected to each other.
  • the first feed line 51 and the second feed line 52 preferably have a vertically symmetrical structure. Further, it is preferable that each of the first feed line 51 and the second feed line 52 has a shape that is symmetrical with respect to a center line of the end surface of the dielectric substrate 3 where the feed portion 5 is located in the left-right direction.
  • the chips 6 are electrically connected to the first feed line 51 and the second feed line 52, respectively.
  • the conductor compensating portion 7 is provided on at least one of the two side faces parallel to the longitudinal direction of the dielectric substrate 3, and the conductor land portion 2 and the conductor radiating portion 4 are electrically connected via the conductor compensating portion 7 .
  • the conductor compensation portion 7 it is preferable that one conductor compensation portion 7 is provided on each of two side faces parallel to the longitudinal direction of the dielectric substrate 3, and the two conductor compensation portions 7 are symmetrical with each other.
  • the conductor compensation portion 7 has an arc shape, a strip shape rectangle, The shape such as a triangle preferably has a vertically symmetrical structure such as a strip-shaped rectangle.
  • the conductor ground portion 2, the conductor radiating portion 4, the power feeding portion 5, and the conductor compensating portion 7 of the RFID tag 1 are made of a conductive material such as copper, aluminum, stainless steel or silver.
  • the conductor ground portion 2, the conductor radiating portion 4, the feeding portion 5, and the conductor compensating portion 7 are preferably formed of a high conductivity powder such as silver.
  • the conductor land portion 2, the dielectric substrate 3, the conductor radiating portion 4, the power feeding portion 5, and the conductor compensating portion 7 correspond to the RFID tag antenna of the present invention.
  • Fig. 6 is a schematic view showing the electrical length of the RFID tag antenna of the present invention.
  • Fig. 7 is a view showing the electrical length when the RFID tag antenna of the present invention does not have the conductor compensating portion.
  • the electrical length of the RFID tag antenna of the present invention is approximately the sum of the lengths of the arrows 1, 2, 3, 4, and 5.
  • the electrical length of the RFID tag antenna of the present invention without the conductor compensating portion 7 is substantially the sum of the lengths of the arrows (1), (2), and (3).
  • the length of the arrow 4 is the height H of the dielectric substrate 3
  • the length of the arrow (3) is the length L of the dielectric substrate 3
  • the electrical length of the RFID tag antenna of the present invention is effectively compensated by the conductor compensating portion 7. Therefore, communication in the UHF (860Mhz to 960Mhz) band can be realized by using an RFID tag antenna smaller than the prior art.
  • the above example is merely a typical example illustrating the compensation effect of the position and width of the conductor compensating portion 7 of the present invention on the electrical length of the RFID tag antenna, but the position and width of the conductor compensating portion 7 of the present invention and the electrical length of the RFID tag antenna
  • the calculation method is not limited to the solution described in the above-mentioned factual manner, and those skilled in the art can make arbitrary adjustments based on the above-mentioned technical solutions disclosed by the present invention, according to the electrical length of the RFID tag antenna described in the above description.
  • the position of the conductor compensating portion 7 and the width w of the conductor compensating portion 7 can be set for the RFID tag antenna of a specific resonant frequency.
  • Conductor compensation unit 7 of the present invention The position of the power feeding unit 5 is not limited to the above embodiment, and those skilled in the art can appropriately change the above-described embodiments of the present invention.
  • the conductor compensation portion of the present invention can also be disposed in the longitudinal direction of the dielectric substrate. At least one end surface of the dielectric substrate 5 may be provided on one side surface in the longitudinal direction of the dielectric substrate.
  • Fig. 8 is a schematic view for explaining the relationship between the width of the conductor compensating portion 7 of the RFID tag antenna of the present invention and the electrical length of the RFID tag antenna.
  • the end portion of the conductor compensating portion 7 close to the feeding portion 5 can be moved only by shifting the entire conductor compensating portion 7 so that the end portion of the conductor compensating portion 7 is also moved.
  • the electrical length of the RFID tag antenna can be changed to change the resonant frequency of the RFID tag antenna.
  • Fig. 9 is a schematic view for explaining the relationship between the width of the power feeding portion of the RFID tag antenna of the present invention and the electrical length of the RFID tag antenna.
  • the chip and the RFID tag antenna must be impedance matched by adjusting the input impedance of the RFID tag antenna.
  • the inventors of the present invention have found that impedance matching between the chip and the RFID tag antenna can be achieved by changing the width of the conductor compensating portion 7 of the RFID tag antenna of the present invention.
  • the arrangement position of the conductor compensating portion 7 of the present invention is not limited to two parallel to the longitudinal direction of the dielectric substrate 3. side On at least one side of the surface, it may be disposed on any one side surface of the dielectric substrate 3, or may be disposed on the same end surface as the power feeding portion 5, and the feeding portion 5 and the conductor compensation portion 7 each occupy the end surface. A part of the power feeding portion 5 and the conductor compensating portion 7 do not overlap and are not electrically conducted.
  • the first feed line 51 and the second feed line 52 may cover one end surface of the dielectric substrate 3 in the longitudinal direction, or may be a part of the end surface, so that the feeder portion 5 and the conductor compensation portion 7 of the present invention are formed on the dielectric substrate 3 .
  • the technical solution of the same end face is shown in FIG.
  • the conductor compensating portion 7 in this modified embodiment is provided on the side or inside of the dielectric substrate 3.
  • the conductor compensating portion 7 may be provided on any one side of the dielectric substrate 3.
  • the conductor compensating portion 7 may be plural, and the conductor compensating portion ⁇ may be disposed only on one side of the dielectric substrate 3, or may be disposed on the side of the different dielectric substrate 11 respectively. on.
  • the conductor compensating portion 7 can also be formed into the inside of the dielectric substrate 3 by a process.
  • the conductor compensating portions 7 are disposed on the same side.
  • the conductor compensating portion 7 may be a metal strip having a width of preferably less than 1 cm, and the first feed line 51, the second feed line 52, and the conductor compensating portion 7 are disposed on the same side. In this way, the installation is convenient, and is particularly suitable for the installation and maintenance of the operator. Moreover, it has been experimentally shown that when the width of the conductive metal strip is less than 1 cm, it also has a conduction effect and has better electrical performance.
  • the width of the conductor compensating portion 7 is selected to be less than 1 cm, it is more advantageous to arrange the first feeding line, the second feeding line and the conductive metal strip on the same side, and at the same time, the strip of the conductive metal strip can be increased or decreased according to the specific requirements of the antenna. Number to achieve the electrical length compensation effect of different RFID tag antennas.
  • the inventors made the test RFID tag having the structure as described above, and performed the performance with the prior art RFID tag disclosed in Patent Document 1 (the applicant of the Patent Document 1 and the applicant of the present invention is the same applicant). Comparison.
  • the test RFID tag produced by the inventors has a shape as shown in Figs. 2, 3, 4, and 5, and its parameters are as follows.
  • Dielectric substrate The material is ceramic dielectric, the size is 12x wide, 7x high and 3mm ;
  • the first feed line and the second feed line are all strip-shaped rectangles having the same size and covering substantially the entire end surface of the dielectric substrate;
  • Chip Made by American Alien, Model: H3 Others: The conductor grounding portion, the conductor radiating portion, the feeding portion, and the conductor compensating portion are solidified by silver powder.
  • the RFID tag in Patent Document 1 was made into the same size of each component as the test RFID tag, and was used as a comparison object in this performance comparison.
  • the performance comparison includes the communication distance of the RFID tag and its operating frequency bandwidth.
  • the Tagformance Lite system test system manufactured by Voyantic Co., Ltd. was used.
  • the communication distance of the RFID tag of the present invention is 2.7 m
  • the communication distance of the RFID tag of the comparison object is 2.1 m
  • the communication distance of the RFID tag of the present invention is remarkably improved.
  • the Tagynance Lite system test system manufactured by Voyantic Corporation was used to measure the operating frequency bandwidth when the read/write distance was greater than 2 m.
  • the operating frequency bandwidth of the RFID tag of the present invention is 905Mhz to 935Mhz, that is, 30Mhz
  • the operating frequency bandwidth of the RFID tag of the comparison object is 917Mhz to 923Mhz, that is, 6Mhz
  • the operating frequency bandwidth performance of the RFID tag of the present invention is obviously improved. .

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Abstract

提供具有补偿结构的RFID标签天线、RFID标签及系统。该RFID标签天线具有：电介质基板（3）；导体接地部（2），覆盖整个面地设置在电介质基板（2）的一个主面上；导体辐射部（4），覆盖整个面地设置在电介质基板（3）的另一个主面上；馈电部（5），设置在电介质基板（3）的长度方向上的一个端面上，具有第一馈线（51）和第二馈线（52），该第一馈线（51）和第二馈线（52）分别与导体接地部（2）和导体辐射部（4）电连接；导体补偿部（7），设置在与电介质基板（7）的长度方向平行的两个侧面中的至少一个侧面上，导体接地部（2）和导体辐射部（4）经由该导体补偿部（7）电连接。

Description

具有补偿结构的 RFID标签天线、 RFID标签及系统 技术领域
本发明涉及 RFID标签天线、 RFID标签及系统，特别地涉及适于贴在金属物体上进行 无线通信的 RFID标签天线、 RFID标签及系统。 背景技术
最近，为了实现流通物流管理、商品管理等的高效化， 国际上广泛应用着 RFID (Radio Frequency Identification: 射频识别）系统。 RFID系统由具有芯片的 RFID标签、与该 RFID 标签进行无线通信的阅读器或读写器构成。
上述 RFID系统中的 RFID标签不仅要满足小型化的要求， 更应该工作性能可靠， 通 信距离足够长。 然而， RFID 标签是安装在各种物体上来使用的， 所以受到来自安装对象 的影响而其天线性能及通信距离等发生变化。 尤其是， 当安装对象为金属面时， 工作性能 的可靠性变差， 而且通信距离将明显降低。
为了即使将 RFID标签安装在金属面上也不会降低天线的性能且在各个位置上能拥有 稳定的认识率，专利文献 1的发明提供了一种具有地面为金属体的微带天线的小型化射频 识别标签。 图 10示出了该射频识别标签。 如该图 10所示， 该射频识别标签的微带贴片天 线包括相互连接的供电部 31及放射部 30， 而且所述放射部 30两侧至少具有一切口 32。
从微带天线的相关技术上看， 微带天线的有效辐射面积对其增益的影响很大， 直接影 响 RFID标签的通信距离及通信频率的带宽。 在微带天线的其他参数不变的情况下， 其有 效辐射面积越大， RFID标签的通信距离越长， 其通信频率带宽也得到改善。
然而， 在现有技术中， 为了得到正常工作的微带天线， 必须在用于安装辐射面的主面 上留出空间来形成微带天线的阻抗匹配网络以及用于调节微带天线的谐振频率的结构。专 利文献 1的发明也不例外。在放射部上所形成的若干个切口， 就是为了形成阻抗匹配网络 以及用于调节谐振频率的结构。为此， 在专利文献 1的发明中牺牲掉了放射部的有效辐射 面积。 可见， 从增加有效辐射面积来提高微带天线的性能的角度考虑， 专利文献 1的发明 还有很大的改善空间。
专利文献 1 : CN101728647A 发明内容
本发明是鉴于上述问题而提出的， 其目的在于提供一种具有补偿结构的 RFID标签天 线、 RFID 标签及系统， 在不改变标签整体尺寸及各个部件的材料的情况下， 上述 RFID 标签天线、 RFID标签及系统能够提升通信距离， 而且能够提高带宽性能。
为了实现上述目的， 本发明提供一种具有补偿结构的 RFID标签天线， 其特征在于， 具有： 电介质基板， 其形状为薄板状的长方体； 导体接地部， 其设置在上述电介质基板的 上下两个主面中的一个主面上， 并覆盖该一个主面的整个面； 导体辐射部， 其设置在上述 电介质基板的上下两个主面中的另一个主面上， 并覆盖该另一个主面的整个面； 馈电部， 其设置在上述电介质基板的一个侧面上， 并具有第一馈线和第二馈线， 该第一馈线和第二 馈线分别与上述导体接地部和上述导体辐射部电连接； 导体补偿部， 其设置在上述电介质 基板的至少一个侧面上， 上述导体接地部和上述导体辐射部经由该导体补偿部电连接。
在本发明的 RFID标签天线中， 馈电部及导体补偿部发挥现有技术中的 RFID标签天 线的阻抗匹配网络及用于调节谐振频率的结构的功能， 而且该馈电部及导体补偿部位于 RFID 标签天线的端面， 所以能够使导体辐射部及导体接地部分别覆盖电介质基板的两个 主面的整个面， 从而在不改变标签整体尺寸及各个部件的材料的情况下， 能够提升通信距 离且能够提高带宽性能。
在本发明的上述具有补偿结构的 RFID标签天线中， 上述导体补偿部的靠近上述馈电 部一侧的端部位于与上述天线的谐振频率相对应的位置。
在上述 RFID标签天线中， 通过改变导体补偿部的靠近馈电部一侧的端部的位置， 将 RFID标签天线的电长度调节为所希望的长度，从而使 RFID标签天线实现所希望的谐振频 率。
在本发明的上述具有补偿结构的 RFID标签天线中， 优选地， 在与上述电介质基板的 长度方向平行的两个侧面上分别都设置有导体补偿部。 而且， 优选地， 两个上述导体补偿 部彼此对称且使用相同的导电材料。 "两个导体补偿部彼此对称"是指， 两个导体补偿部 各自在上述两个侧面上的位置彼此对称且形状相同， 也就是说， 两个导体补偿部关于与上 述两个侧面各自的距离相同且与上述两个侧面平行的平面彼此对称。
在上述 RFID标签天线中， 通过采用两个彼此对称的导体补偿部， 能够使 RFID标签 天线的导体接地部和导体辐射部上的电流分布变得更加均匀，从而进一步能够提升通信距 离且能够提高带宽性能。
在本发明的上述具有补偿结构的 RFID标签天线中， 优选地， 上述导体补偿部具有上 下对称的形状。 而且， 优选地， 上述第一馈线和第二馈线上下对称。
在上述 RFID标签天线中， 导体接地部和导体辐射部上下对称， 导体补偿部具有上下 对称的形状，第一馈线和第二馈线上下对称， 即整个 RFID标签天线具有上下对称的结构， 所以在 RFID标签天线的各个部件采用同一导体材料的情况下， 该 RFID标签天线在生产 过程中和使用过程中完全无需区分正反向， 这有利于提高生产效率以及便于使用。
在本发明的上述具有补偿结构的 RFID标签天线中， 优选地， 上述第一馈线和第二馈 线上下对称，上述第一馈线和第二馈线分别具有关于上述馈电部所处的端面在左右方向上 的中心线对称的形状。还有， 上述第一馈线和第二馈线在上述电介质基板的宽度方向上具 有与上述天线的谐振频率相对应的宽度。
在本发明的上述具有补偿结构的 RFID标签天线中， 优选地， 上述导体补偿部的靠近 上述馈电部一侧的端部与该导体补偿部所处的侧面的远离上述馈电部一侧的端部之间的 距离 1满足关系式 H+L/2, 其中， H为上述电介质基板的高度， L为上述电介质基板的 长度。 在本发明的 RFID标签天线中， 利用设置在电介质基板的侧面上的导体补偿部， 能 够补偿因缩小标签天线尺寸而造成的电长度损失， 从而能够进一步实现 RFID标签的小型 化。尤其是， 导体补偿部的靠近馈电部一侧的端部与该导体补偿部所处的侧面的远离馈电 部一侧的端部之间的距离 1满足关系式 H+L/2 (其中， H为电介质基板的高度， L为电 介质基板的长度） 时， 利用导体补偿部的电长度补偿效果更加有效。
在本发明的上述馈电部设置于上述电介质基板的长度方向平行的两个侧面中的一 个侧面上， 上述导体补偿部设置于上述电介质基板的长度方向上的至少一个端面上。
在本发明的上述具有补偿结构的 RFID标签天线中， 优选地， 上述导体补偿部设置在 与上述馈电部同一侧面或者同一端面上。
在本发明的上述具有补偿结构的 RFID标签天线中， 优选地， 上述导体补偿部为至少 一个金属条。
在本发明的上述具有补偿结构的 RFID标签天线中， 优选地， 上述导体补偿部的宽度 小于 lcm。
在上述 RFID标签天线中， 通过改变第一馈线和第二馈线的宽度， 能够将 RFID标签 天线的电长度调节为所希望的长度， 从而使 RFID标签天线实现所希望的谐振频率。
在本发明的上述具有补偿结构的 RFID标签天线中， 优选地， 上述导体接地部、 上述 导体辐射部、 上述第一馈线、 上述第二馈线及导体补偿部由高导电率粉末固化而成。
为了实现上述目的， 本发明还提供一种 RFID标签， 其特征在于， 具有： 如上所述的 具有补偿结构的 RFID标签天线； 芯片， 其分别与上述第一馈线和上述第二馈线电连接。 其中， 上述导体补偿部具有能够使该 RFID标签天线与上述芯片达到阻抗匹配的宽度。
为了实现上述目的， 本发明还提供一种 RFID系统， 其特征在于， 具有： 如上所述的 RFID标签； 与该 RFID标签进行无线通信的阅读器或读写器。
根据以上的结构可知， 若采用本发明， 则在不改变标签整体尺寸及各个部件的材料的 情况下， 上述 RFID标签天线、 RFID标签及系统能够提升通信距离， 而且能够提高带宽性 能。 也就是说， 在保持通信距离及带宽性能不变的情况下， 能够进一步实现 RFID标签及 天线的小型化。 附图说明
图 1是示出了本发明的 RFID系统的示意图。
图 2是用于说明本发明的 RFID标签的立体图。
图 3是本发明的 RFID标签的仰视图。
图 4是本发明的 RFID标签的俯视图。
图 5是本发明的 RFID标签的左视图。
图 6是示出了本发明的 RFID标签天线的电长度的示意图。
图 7是示出了本发明的 RFID标签天线不具有导体补偿部时的电长度的示意图。
图 8是用于说明本发明的 RFID标签天线的导体补偿部的宽度和 RFID标签天线的电 长度之间的关系的示意图。
图 9是用于说明本发明的 RFID标签天线的馈电部的宽度和 RFID标签天线的电长度 之间的关系的示意图。
图 10是示出了现有技术的 RFID标签的示意图。
图 11是本发明的一变形例的某一侧面示意图。 具体实施方式
下面， 参照附图来说明本发明的实施方式。
<RFID系统及 RFID标签的结构 >
图 1是示出了本发明的 RFID系统的示意图， 图 2是用于说明本发明的 RFID标签的 立体图。
首先，参照图 1，说明本发明的 RFID系统 100的结构。本发明的 RFID系统 100包括： RFID标签 1， 其安装在钢铁制品、 模具、 制造设备等金属物体 M上； 读写器 RW， 其与 RFID标签 1非接触地进行信息的读写。例如，在将 RFID标签 1安装在不锈钢板材等通过 肉眼难以识别的钢铁制品上并进行出入库、 盘点等作业时， RFID系统 100通过可便携的 读写器 RW来进行对象物体的拣选 （picking) 、 成品检查， 或者在将 RFID标签 1安装在 模具或制造设备上并进行盘点或实物确认时等， 利用 RFID系统 100来进行管理。
另外， 在本发明的 RFID系统 100中， 读写器 RW能够利用可便携的读写器 RW， 也 能够利用固定式的读写器 RW， 并且读写器 RW也可以是阅读器。
接着， 参照图 2来说明 RFID标签 1的结构。
如图 2所示， RFID标签 1具有导体接地部 2、 电介质基板 3、 导体辐射部 4、 馈电部 5、 芯片 6及导体补偿部 7。
图 3是本发明的 RFID标签 1的仰视图。
如图 3所示， 导体接地部 2设置在电介质基板 3的一个主面上， 并覆盖该主面的整个 面。
上述电介质基板 3由陶瓷电介质， 或者 FR4、 聚四氟乙烯、 聚乙烯、 聚对苯二甲酸乙 二醇酯 （PET) 、 聚丙烯及聚酰亚胺等合成树脂材料形成， 其形状为薄板状的长方体。 在 本发明中， 电介质基板 3优选采用陶瓷电介质。
图 4是本发明的 RFID标签 1的俯视图。
如图 4所示， 导体辐射部 4设置在上述电介质基板 3的另一个主面上， 并覆盖该另一 个主面的整个面。
图 5是本发明的 RFID标签 1的左视图。
如图 2及 5所示， 馈电部 5设置在上述电介质基板 3的长度方向上的一个端面上， 并 具有第一馈线 51和第二馈线 52， 该第一馈线 51和第二馈线 52分别与上述导体接地部 2 和上述导体辐射部 4电连接。该第一馈线 51和第二馈线 52优选采用上下对称的结构。还 有，优选使上述第一馈线 51和第二馈线 52分别具有关于上述馈电部 5所处的电介质基板 3的端面在左右方向上的中心线对称的形状。
如图 5所示， 芯片 6分别与上述第一馈线 51和上述第二馈线 52电连接。
返回到图 2， 导体补偿部 7设置在与上述电介质基板 3的长度方向平行的两个侧面中 的至少一个侧面上， 上述导体接地部 2和上述导体辐射部 4经由该导体补偿部 7电连接。 在发明中，优选在与上述电介质基板 3的长度方向平行的两个侧面上分别都设置一个导体 补偿部 7， 而且使这两个导体补偿部 7彼此对称。 该导体补偿部 7具有弧形、 带状矩形、 三角形等形状， 优选具有带状矩形等上下对称的结构。
上述 RFID标签 1的导体接地部 2、导体辐射部 4、馈电部 5及导体补偿部 7由导电性 材料构成， 如铜、 铝、 不锈钢或银等。 在本发明中， 导体接地部 2、 导体辐射部 4、 馈电 部 5及导体补偿部 7优选由银等高导电率粉末固化而成。 在上述 RFID标签 1的结构中， 导体接地部 2、 电介质基板 3、 导体辐射部 4、 馈电部 5及导体补偿部 7相当于本发明的 RFID标签天线。
<导体补偿部对 RFID标签天线的电长度的补偿作用>
下面， 参照图 6及图 7来说明导体补偿部 7对 RFID标签天线的电长度的补偿作用。 图 6是示出了本发明的 RFID标签天线的电长度的示意图。 图 7是示出了本发明的 RFID标签天线不具有导体补偿部 Ί时的电长度的示意图。
如图 6的 （a) 、 (b ) 所示， 本发明的 RFID标签天线的电长度大致为箭头①、 ②、 ③、 ④、 ⑤的长度之和。
而如图 7的 （a) 、 (b ) 所示， 本发明的 RFID标签天线不具有导体补偿部 7时的电 长度大致为箭头 (1)、 （2)、 （3)的长度之和。
在图 6的 （a) 中的馈电部 5和图 7的 （a) 中的馈电部 5的形状等各参数为改变的情 况下， 箭头①、 ②的长度之和显然等于箭头 (1)、 （2)的长度之和。 由于箭头④的长度为电介 质基板 3的高度 H， 箭头 (3)的长度为电介质基板 3的长度 L， 所以在箭头④、 ⑤的长度之 和大于箭头 (3)的长度的情况下， 即在导体补偿部 7的靠近馈电部 5—侧的端部与该导体补 偿部 7所处的侧面的远离馈电部 5—侧的端部之间的距离 1满足关系式 H+L/2的情况下， 本发明的 RFID标签天线的电长度通过导体补偿部 7得到有效的补偿。 因此， 利用比现有 技术更小尺寸的 RFID标签天线， 就能够实现在 UHF ( 860Mhz〜960Mhz ) 频段内的通信。
仔细观察图 6及图 7， 则不难看出， 若导体补偿部 7的远离馈电部 5—侧的端部与该 导体补偿部所处的侧面的远离馈电部一侧的端部相重叠， 则导体补偿部 7的宽度 w变为 w=l， 此时， 在导体补偿部 7的宽度 w满足关系式 w<H+L/2的情况下， 本发明的 RFID标 签天线的电长度通过导体补偿部 7得到有效的补偿。以上示例仅是说明本发明的导体补偿 部 7的位置及宽度对 RFID标签天线的电长度的补偿作用的典型性示例， 然而本发明的导 体补偿部 7的位置及宽度以及 RFID标签天线的电长度的计算方式并不以上述事实方式所 记载的方案为限，本领域技术人员在本发明公开的上述技术方案的基础上可以做任意的调 整， 根据上述说明所记载的 RFID标签天线的电长度的补偿原理， 可这对特定谐振频率的 RFID标签天线设置导体补偿部 7的位置及导体补偿部 7的宽度 w。本发明的导体补偿部 7 和馈电部 5的位置也并不以上述实施例为限，本领域技术人员可以在本发明上述实施例的 基础上作适当变更，本发明的导体补偿部也可以设置在电介质基板的长度方向的至少一端 面上， 而上述馈电部 5也可以设置在电介质基板的长度方向的一个侧面。
图 8是用于说明本发明的 RFID标签天线的导体补偿部 7的宽度和 RFID标签天线的 电长度之间的关系的示意图。
当向图 8中的箭头 A方向缩小导体补偿部 7的宽度时， 如图 6的 （a) 、 （b)所示那 样由箭头①、 ②、 ③、 ④、 ⑤的长度之和来示出的 RFID标签天线的电长度会增加， 从而 能够使 RFID标签天线的谐振频率降低，而当向箭头 A的反方向增加导体补偿部 7的宽度 时， 能够使 RFID标签天线的谐振频率升高。
另外， 理所当然地， 在不改变导体补偿部 7的宽度的情况下， 只通过使导体补偿部 7 整体平移， 也能够使导体补偿部 7的靠近馈电部 5—侧的端部移动， 这样也能够使 RFID 标签天线的电长度改变， 从而改变 RFID标签天线的谐振频率。
<馈电部对 RFID标签天线的电长度的补偿作用>
下面， 参照图 6及 9来说明馈电部 5对 RFID标签天线的电长度的补偿作用。
图 9是用于说明本发明的 RFID标签天线的馈电部的宽度和 RFID标签天线的电长度 之间的关系的示意图。
当向图 9中的箭头 B方向缩小馈电部 5的第一馈线 51及第二馈线 52在上述电介质基 板 3宽度方向上的宽度时， 由图 6的（a) 中的箭头①、②的长度之和来示出的 RFID标签 天线的局部电长度会变小， 从而能够使 RFID标签天线的谐振频率升高， 而当向箭头 B的 反方向增加馈电部 5的第一馈线 51及第二馈线 52的宽度时， 能够使 RFID标签天线的谐 振频率降低。
<导体补偿部对 RFID标签天线的阻抗匹配作用 >
想要让芯片从 RFID标签天线获得最大的功率， 应该使两者达到阻抗匹配。 当 RFID 标签所采用的芯片已被确定的情况下， 必须通过调节 RFID标签天线的输入阻抗来使芯片 和 RFID标签天线达到阻抗匹配。
本发明的发明人发现， 通过改变本发明的 RFID标签天线的导体补偿部 7的宽度， 可 以达到芯片和 RFID标签天线的阻抗匹配。
<本发明的其他变形实施方式 >
需要说明的是， 以上示例仅以较为优选的方式说明本发明的导体补偿部 7的结构， 但 本发明的导体补偿部 7的设置位置并不限于与上述电介质基板 3的长度方向平行的两个侧 面中的至少一个侧面上， 其可以是设置在上述电介质基板 3的任何一个侧面， 也可以设置 在与馈电部 5同一端面上， 此时馈电部 5和导体补偿部 7各占该端面的一部分， 且馈电部 5和导体补偿部 7不重合且不电导通。 该第一馈线 51和第二馈线 52可以覆盖该电介质基 板 3的长度方向上的一个端面， 也可以是该端面的一部分， 从而实现本发明的馈线部 5和 导体补偿部 7形成于电介质基板 3的同一端面的技术方案， 如图 11所示。
该变形实施例中的导体补偿部 7设置在电介质基板 3的侧面或内部上。 当然的， 导体 补偿部 7可以是设置在电介质基板 3的任何一个侧面上。作为该变形实施例的进一步改进， 导体补偿部 7也可以是多条，并且该导体补偿部 Ί可以只设置在电介质基板 3的一个侧面 上， 也可以分别设置在不同的介质基片 11的侧面上。 导体补偿部 7也可以利用工艺制作 至介电介质基板 3的内部。 优选的， 在本实例中， 导体补偿部 7设置在同一个侧面。
作为本变形实施方式的较佳实施形态， 导体补偿部 7可以为金属条， 其宽度优选的小 于 lcm， 并且， 第一馈线 51、 第二馈线 52和导体补偿部 7设置在同一侧面。 这样， 由此 实现安装方便， 特别适合操作人员的按装、 维修， 还有， 经实验表明， 导电金属条的宽度 小于 lcm时， 也具有导通作用， 并且拥有更佳的电气性能。 而且， 当导体补偿部 7的宽度 选择小于 lcm时， 更利于将第一馈线、第二馈线和导电金属条设置在同一侧面的布局， 同 时还可根据天线的具体要求增减导电金属条的条数， 以实现不同的 RFID标签天线的电长 度补偿效果。
同样的，前述实施例及如图 6和图 7中所示的电长度计算公式也适用于本发明的该变 形实施例中。
<本发明的 RFID标签与现有的 RFID标签的性能比较>
发明人制作了如上所述结构的测试用 RFID标签， 并与专利文献 1 (该专利文献 1的 申请人与本发明的申请人为同一个申请人） 所公开的现有技术的 RFID标签进行了性能比 较。
发明人所制作的测试用 RFID标签具有如图 2、 3、 4、 5所示的形状， 其各参数如下。 电介质基板： 材料为陶瓷电介质， 尺寸为长 12x宽 7x高 3mm;
第一馈线和第二馈线： 形状都为带状矩形， 大小彼此相同， 覆盖电介质基板的大致整 个端面；
导体补偿部： 采用两个导体补偿部， 宽度为 4mm， 而且导体补偿部 7的远离馈电部 5 一侧的端部与该导体补偿部所处的侧面的远离馈电部一侧的端部相重叠， 即 w=l;
芯片： 美国 Alien公司制， 型号： H3 其他： 导体接地部、 导体辐射部、 馈电部及导体补偿部由银粉末固化而成。
将专利文献 1中的 RFID标签制作成各部件的相应尺寸与测试用 RFID标签相同， 并 作为这次的性能比较中的比较对象。
性能比较的内容包括 RFID标签的通信距离及其工作频率带宽。
在 RFID标签的通信距离的测定中，使用了 Voyantic公司制的 Tagformance Lite system 测试系统。 测定的结果， 本发明的 RFID标签的通信距离为 2.7米， 而比较对象的 RFID 标签的通信距离为 2.1米， 本发明的 RFID标签的通信距离明显得到提升。
在 RFID 标签的工作频率带宽的测定中， 使用 Voyantic 公司制的 Tagformance Lite system测试系统， 测定了读写距离大于 2 米时的工作频率带宽。 测定的结果， 本发明的 RFID标签的工作频率带宽为 905Mhz〜935Mhz即 30Mhz，而比较对象的 RFID标签的工作 频率带宽为 917Mhz〜923Mhz即 6Mhz，本发明的 RFID标签的工作频率带宽性能明显得到 提高。
本发明公开的上述实施方式只是例示， 而不可视为限定。本发明的范围并不仅限定于 如上所述的内容， 而是由权利要求书的范围来示出， 包括与权利要求书中的各技术特征等 同的技术方案以及在权利要求书的范围内的所有变形。

Claims

权利要求
1. 一种具有补偿结构的 RFID标签天线， 其特征在于， 具有：
电介质基板， 其形状为薄板状的长方体；
导体接地部，其设置在上述电介质基板的上下两个主面中的一个主面上，并覆盖该一 个主面的整个面；
导体辐射部，其设置在上述电介质基板的上下两个主面中的另一个主面上，并覆盖该 另一个主面的整个面；
馈电部，其设置在上述电介质基板的长度方向上的一个端面上，并具有第一 馈线和第二馈线， 该第一馈线和第二馈线分别与上述导体接地部和上述导体 辐射部电连接；
导体补偿部， 其设置在与上述电介质基板的长度方向平行的两个恻面中 的至少一个恻面上， 上述导体接地部和上述导体辐射部经由该导体补偿部电 连接。
2. 如权利要求 1所述的具有补偿结构的 RFID标签天线， 其特征在于， 上述导体补 偿部的靠近上述馈电部一侧的端部位于与上述天线的谐振频率相对应的位置。
3. 如权利要求 1所述的具有补偿结构的 RFID标签天线， 其特征在于， 所述导体补 偿部设置在与上述电介质基板的长度方向平行的两个恻面上。
4. 如权利要求 3所述的具有补偿结构的 RFID标签天线， 其特征在于， 两个上述导 体补偿部彼此对称并使用相同的导电材料。
5. 如权利要求 1所述的具有补偿结构的 RFID标签天线， 其特征在于， 上述导体补 偿部具有上下对称的形状。
6. 如权利要求 1所述的具有补偿结构的 RFID标签天线， 其特征在于，
上述第一馈线和第二馈线上下对称，
上述第一馈线和第二馈线分别具有关于上述馈电部所处的侧面在左右方向上的中心 线对称的形状。
7. 如权利要求 1所述的具有补偿结构的 RFID标签天线， 其特征在于， 上述第一馈 线和第二馈线在上述电介质基板的宽度方向上具有与上述天线的谐振频率相对应的宽度。
8. 如权利要求 7所述的具有补偿结构的 RFID标签天线， 其特征在于， 上述导体补 偿部的靠近上述馈电部一侧的端部与该导体补偿部所处的侧面的远离上述馈电部一侧的 端部之间的距离 1满足关系式 H+L/2, 其中， H为上述电介质基板的高度， L为上述电 介质基板的长度。
9. 如权利要求 1所述的具有补偿结构的 RFID标签天线， 其特征在于， 上述馈电部 设置于上述电介质基板的长度方向平行的两个侧面中的一个侧面上，上述导体补偿部 设置于上述电介质基板的长度方向上的至少一个端面上。
10. 如权利要求 1所述的具有补偿结构的 RFID标签天线， 其特征在于， 上述导体补 偿部 （7) 与上述馈电部 （5 ) 设置在同一侧面或者同一端面上。
11. 如权利要求 10所述的具有补偿结构的 RFID标签天线， 其特征在于上述导体补 偿部 （7) 为至少一个金属条。
12. 如权利要求 11所述的具有补偿结构的 RFID标签天线， 其特征在于上述导体补 偿部的宽度小于 lcm。
13. 一种 RFID标签， 其特征在于，
具有：
前述权利要求 1至 12中任一项所述的具有补偿结构的 RFID标签天线，
芯片， 其分别与上述第一馈线和上述第二馈线电连接；
上述导体补偿部具有能够使该 RFID标签天线与上述芯片达到阻抗匹配的宽度。
14. 一种 RFID系统， 其特征在于， 具有：
如权利要求 13所述的 RFID标签； 以及
与该 RFID标签进行无线通信的阅读器或读写器。
PCT/CN2012/076633 2011-06-08 2012-06-08 具有补偿结构的rfid标签天线、rfid标签及系统 WO2012167740A1 (zh)

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103280629B (zh) * 2013-04-28 2015-09-23 嘉兴微感电子科技有限公司 Rfid陶瓷天线及其电子标签基体和螺钉式rfid标签
CN103280631A (zh) * 2013-04-28 2013-09-04 嘉兴微感电子科技有限公司 Rfid特种标签用pifa天线
CN103559533B (zh) * 2013-09-16 2016-04-20 杭州电子科技大学 一种射频识别标签以及包括该标签的射频识别系统
TWI661607B (zh) * 2015-02-10 2019-06-01 日商鳳凰解決方案股份有限公司 Ｒｆ標籤用天線、ｒｆ標籤、附rf標籤之導體、及附盒體之rf標籤
CN107681259B (zh) * 2017-08-29 2021-01-26 深圳市盛路物联通讯技术有限公司 天线装置及无线通信设备
CN111492379B (zh) * 2017-12-25 2023-10-24 京瓷株式会社 Rfid标签用基板、rfid标签以及rfid系统
CN108073971A (zh) * 2017-12-25 2018-05-25 上海数斐信息科技有限公司 一种小型化双谐振抗金属rfid标签
CN108309371A (zh) * 2018-02-06 2018-07-24 上海数斐信息科技有限公司 一种手术器械及该手术器械用rfid标签的安装方法
CN114261602B (zh) * 2021-10-28 2024-05-14 浙江菜鸟供应链管理有限公司 一种射频包装箱及其加工方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101378145A (zh) * 2007-08-30 2009-03-04 富士通株式会社 标签天线和标签
CN101533946A (zh) * 2009-04-23 2009-09-16 杭州杰竞科技有限公司 微型嵌入式超高频射频识别抗金属标签天线
CN101728647A (zh) 2010-01-20 2010-06-09 刘智佳 小型化射频识别标签及其中的微带贴片天线
CN201741805U (zh) * 2010-08-27 2011-02-09 电子科技大学 一种电子标签天线
CN202205887U (zh) * 2011-06-08 2012-04-25 刘智佳 具有补偿结构的rfid标签天线、rfid标签及系统

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3286912B2 (ja) * 1997-12-19 2002-05-27 株式会社村田製作所 表面実装型アンテナおよびそれを用いた通信機
JP2003046322A (ja) * 2001-07-27 2003-02-14 Iwaki Electronics Corp 表面実装用アンテナおよびこれを用いた無線装置
US7224280B2 (en) * 2002-12-31 2007-05-29 Avery Dennison Corporation RFID device and method of forming
US7501984B2 (en) * 2003-11-04 2009-03-10 Avery Dennison Corporation RFID tag using a surface insensitive antenna structure
US7652636B2 (en) * 2003-04-10 2010-01-26 Avery Dennison Corporation RFID devices having self-compensating antennas and conductive shields
JP2005236624A (ja) * 2004-02-19 2005-09-02 Yokowo Co Ltd 誘電体アンテナ
US7158033B2 (en) * 2004-09-01 2007-01-02 Avery Dennison Corporation RFID device with combined reactive coupler
US7501955B2 (en) * 2004-09-13 2009-03-10 Avery Dennison Corporation RFID device with content insensitivity and position insensitivity
EP1807901B1 (en) * 2004-11-02 2019-09-04 Sensormatic Electronics, LLC Antenna for a combination eas/rfid tag with a detacher
US7768407B2 (en) * 2007-06-22 2010-08-03 Avery Dennison Corporation Foldable RFID device interposer and method
JP5170109B2 (ja) * 2008-01-07 2013-03-27 富士通株式会社 電子装置、アンテナおよび物品
EP2256673B1 (de) * 2009-05-29 2013-11-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. RFID-Transponder zur Montage auf Metall und Herstellungsverfahren für denselben
CN201628986U (zh) * 2010-04-06 2010-11-10 黎家浩 抗金属电子标签
US20130049933A1 (en) * 2011-08-25 2013-02-28 Elwha LLC, a limited liability company of the State of Delaware Systems, devices, methods, and admixtures including interrogators and interrogation of tags for indication of food attributes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101378145A (zh) * 2007-08-30 2009-03-04 富士通株式会社 标签天线和标签
CN101533946A (zh) * 2009-04-23 2009-09-16 杭州杰竞科技有限公司 微型嵌入式超高频射频识别抗金属标签天线
CN101728647A (zh) 2010-01-20 2010-06-09 刘智佳 小型化射频识别标签及其中的微带贴片天线
CN201741805U (zh) * 2010-08-27 2011-02-09 电子科技大学 一种电子标签天线
CN202205887U (zh) * 2011-06-08 2012-04-25 刘智佳 具有补偿结构的rfid标签天线、rfid标签及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2720318A4 *

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