WO2023000509A1 - 一种双面抗金属小型化rfid标签天线 - Google Patents

一种双面抗金属小型化rfid标签天线 Download PDF

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Publication number
WO2023000509A1
WO2023000509A1 PCT/CN2021/122956 CN2021122956W WO2023000509A1 WO 2023000509 A1 WO2023000509 A1 WO 2023000509A1 CN 2021122956 W CN2021122956 W CN 2021122956W WO 2023000509 A1 WO2023000509 A1 WO 2023000509A1
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Prior art keywords
metal
antenna
rfid tag
double
radiation sheet
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PCT/CN2021/122956
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English (en)
French (fr)
Inventor
袁家德
郑景杭
许志猛
陈志璋
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福州大学
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Publication of WO2023000509A1 publication Critical patent/WO2023000509A1/zh

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    • 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
    • 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

Definitions

  • the invention relates to the technical field of wireless communication, in particular to a double-sided anti-metal miniaturized RFID tag antenna.
  • Radio Frequency Identification is mainly composed of three parts: the first part is a transponder: generally speaking, it is a label, and the label is designed according to different usage scenarios.
  • the second part is the reader: the device used to read and write information to the tag.
  • the third part is the application software system: according to different scenarios, the collected data is further processed and used by people.
  • the utility model proposes a double-sided anti-metal miniaturized RFID tag antenna, which covers the application frequency band of my country's ultra-high frequency RFID tag antenna, not only has good orientation and broadband characteristics, but also has compact size and simple structure, and is suitable for application in the Internet of Things In the intelligent identification system.
  • the utility model adopts the following technical solutions.
  • a double-sided anti-metal miniaturized RFID tag antenna the antenna is a three-layer integrated folded structure, and the layers of the folded structure are supported by an elastic substrate;
  • the antenna radiation arm of the antenna consists of a bent A dipole tag composed of an antenna radiation circuit structure and a folded metal radiation sheet;
  • the middle part of the dipole tag is equipped with an RFID tag antenna chip;
  • the surface of the metal radiation sheet is provided with a curved metal sheet for adjusting the impedance of the tag antenna Loop; when the metal radiation sheet is in a folded form and used in a metal environment, the performance of the metal loops on both sides of the folded form is the same.
  • the substrate is a dielectric substrate formed of foam; the metal radiation sheet is a metal surface formed by corrosion of copper foil or aluminum foil.
  • the bent shape of the bent metal circuit is a rectangle or a rectangle with a radian; the shape of the metal radiation sheet is a rectangle or a rectangle with grooves.
  • the layer spacing of each layer of the folded structure is a fixed value, and the metal radiation sheet in the folded form forms the same metal radiation surface with anti-metal properties located at the top and bottom of the folded form of the antenna.
  • the total length of the metal radiation sheet is the length corresponding to a quarter wavelength of the center frequency of the working frequency band of the antenna or an integer multiple thereof.
  • the total length of the metal radiation sheet matches the type of chip carried by the tag antenna.
  • the substrate includes a first layer of foam substrate and a second layer of foam substrate with the same fixed thickness, and the shape of the first layer of foam substrate and the second layer of foam substrate is the same as the metal radiation sheet on the substrate.
  • the metal circuits on both sides of the folded form have the same anti-metal properties.
  • the antenna When the antenna is in a folded state, its size is 42 ⁇ 13mm ⁇ 2mm.
  • the utility model has the following advantages: the antenna arm on one side of the radiation surface adopts a bent structure, which can effectively compress the size of the antenna and ensure that its frequency point does not shift; the antenna arm on the other side It plays the role of adjusting impedance and folding, so that the top and bottom of the tag antenna are completely symmetrical, ensuring the same performance when used on both sides, and both have anti-metal properties.
  • the size of the antenna can be 42 ⁇ 13mm ⁇ 2mm, which is smaller and thinner than the existing folding tag antenna, and the antenna has good performance, compact size and low manufacturing cost, and is suitable for application in intelligent identification of the Internet of Things.
  • the present invention adopts an integrated folding structure, which not only has a simple structural design and compact size, but also has excellent anti-metal performance on both front and back sides due to the symmetrical characteristics of the tag antenna itself after folding, and can cover my country's ultra-high frequency RFID
  • the application frequency band of the tag antenna realizes the broadband radiation of the antenna, and is suitable for application in the intelligent identification system of the Internet of Things.
  • a double-sided anti-metal miniaturized RFID tag antenna the antenna is a three-layer integrated folding structure, and the layers of the folding structure are supported by elastic substrates;
  • the antenna radiation arm of the antenna It includes a dipole tag composed of a bent antenna radiation circuit structure 1 and a folded metal radiation sheet 4; the middle part of the dipole tag is equipped with a chip 2 of the RFID tag antenna; the surface of the metal radiation sheet is provided with a
  • the curved metal loop is used to adjust the impedance of the tag antenna; when the metal radiator is in a folded form and used in a metal environment, the performance of the metal loop on both sides of the folded form is the same.
  • the substrate is a dielectric substrate formed of foam; the metal radiation sheet is a metal surface formed by corrosion of copper foil or aluminum foil.
  • the bent shape of the bent metal circuit is a rectangle or a rectangle with a radian; the shape of the metal radiation sheet is a rectangle or a rectangle with grooves.
  • the layer spacing of each layer of the folded structure is a fixed value, and the metal radiation sheet in the folded form forms the same metal radiation surface with anti-metal properties located at the top and bottom of the folded form of the antenna.
  • the total length of the metal radiation sheet is the length corresponding to a quarter wavelength of the center frequency of the working frequency band of the antenna or an integer multiple thereof.
  • the total length of the metal radiation sheet matches the type of chip carried by the tag antenna.
  • the substrate includes a first layer of foam substrate 3 and a second layer of foam substrate 5 with the same fixed thickness, and the shape of the first layer of foam substrate and the second layer of foam substrate is the same as the metal radiation sheet on the substrate.
  • the metal radiating sheet When the metal radiating sheet is in a folded form and used in a metal environment, the metal circuits on both sides of the folded form have the same anti-metal properties.
  • the antenna When the antenna is in a folded state, its size is 42 ⁇ 13mm ⁇ 2mm.

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

Abstract

本实用新型提出一种双面抗金属小型化RFID标签天线，所述天线为三层的一体式折叠结构，折叠结构的各层之间以弹性的基板为支撑；所述天线的天线辐射臂包括由弯折的天线辐射回路结构、折叠形态的金属辐射片组成的偶极子标签；所述偶极子标签的中部搭载有RFID标签天线的芯片；所述金属辐射片表面设有用于调整标签天线阻抗的弯曲金属回路；当金属辐射片处于折叠形态并在金属环境下使用时，其折叠形态两面的金属回路性能相同；本实用新型覆盖我国超高频RFID标签天线的应用频段，不仅拥有良好的定向性和宽带特性，而且尺寸紧凑，结构简单，适合应用在物联网智能识别系统中。

Description

一种双面抗金属小型化RFID标签天线 技术领域
本发明涉及无线通信技术领域，尤其是一种双面抗金属小型化RFID标签天线。
背景技术
射频识别技术(Radio Frequency Identification,RFID)主要由三部分构成：第一部分是应答器：一般来说是标签，标签根据使用场景的不同有针对性的设计。第二部分是阅读器：用来向标签读取和写入信息的设备。第三部分是应用软件系统：根据不同场景将收集到的数据进一步处理并为人们所使用。
RFID系统第一次在现实中得到应用是在二战的英国。英国利用RFID标签配合雷达来识别敌我飞机的身份，此后RFID系统开始逐步的发展。直到20世纪60年代，RFID系统开始在商业活动中应用，但是RFID标签昂贵的价格限制了RFID技术的应用场景。随着时间发展到21世纪初，RFID标签的成本越来越低，如今RFID标签价格为0.1元/枚甚至更低。随着生产成本的降低，RFID系统开始朝着多元化的方向发展。
但是当标签工作于不同的目标物体时，尤其是金属物体则会产生明显的失谐效应，甚至导致整个RFID系统出现异常。在实际应用中，为满足不同需求，标签需要工作在包括金属在内的多种物体上。因此，国内外众多学者对抗金属的电子标签展开研究。
技术问题
近年来，抗金属标签天线的方案已被大量提出，折叠天线、缝隙天线、使用新型材料制作的标签天线等。但以上方案仅能保证标签天线一面的性能，无法正反两面都有良好的抗金属特性。
技术解决方案
本实用新型提出一种双面抗金属小型化RFID标签天线，覆盖我国超高频RFID标签天线的应用频段，不仅拥有良好的定向性和宽带特性，而且尺寸紧凑，结构简单，适合应用在物联网智能识别系统中。
本实用新型采用以下技术方案。
一种双面抗金属小型化RFID标签天线，所述天线为三层的一体式折叠结构，折叠结构的各层之间以弹性的基板为支撑；所述天线的天线辐射臂包括由弯折的天线辐射回路结构、折叠形态的金属辐射片组成的偶极子标签；所述偶极子标签的中部搭载有RFID标签天线的芯片；所述金属辐射片表面设有用于调整标签天线阻抗的弯曲金属回路；当金属辐射片处于折叠形态并在金属环境下使用时，其折叠形态两面的金属回路性能相同。
所述基板为以泡棉成型的介质基板；所述金属辐射片为以铜箔或铝箔经腐蚀法成型的金属面。
所述弯折的金属回路的弯折形状为矩形或带弧度的矩形；所述金属辐射片的形状为矩形或带槽矩形。
当天线处于折叠形态时，折叠结构各层的层间距为固定值，折叠形态的金属辐射片形成位于天线折叠形态最上方和最下方的相同的具备抗金属特性的金属辐射面。
所述金属辐射片的总长度为天线工作频段中心频率的四分之一波长对应的长度或其整数倍。
所述金属辐射片的总长度与标签天线搭载的芯片型号相匹配。
所述基板包括厚度为相同固定值的第一层泡棉基板和第二层泡棉基板，第一层泡棉基板和第二层泡棉基板的形状与基板上的金属辐射片相同。
当金属辐射片处于折叠形态并在金属环境下使用时，其折叠形态两面的金属回路的抗金属特性的性能相同。
所述天线处于折叠形态时，其尺寸为42×13mm×2mm。
与现有技术相比，本实用新型具有以下优势：在辐射面的一侧天线臂上采用弯折结构，能够有效地压缩天线的尺寸并且保证其频点不产生偏移；另一侧天线臂起到调节阻抗和折叠的作用，使得标签天线上下面完全对称，保证双面使用时性能相同，且都具有抗金属特性。该天线尺寸可为42×13mm×2mm，与现有的折叠式标签天线相比尺寸更小更薄，且该天线性能良好、尺寸紧凑，制造成本低，适合应用在物联网智能识别中。
有益效果
本发明采用一体式的折叠结构，不仅结构设计简单、尺寸紧凑，而且由于标签天线自身折叠后对称的特点，无论是正反两面都能够有极好的抗金属性能，可以覆盖我国超高频RFID标签天线的应用频段，实现天线宽带辐射，适合应用在物联网智能识别系统中。
附图说明
下面结合附图和具体实施方式对本发明进一步详细的说明：
附图1是本实用新型的结构展开示意图；
附图2是本实用新型在折叠形态下的结构示意图；
附图3是本实用新型的上底面示意图；
附图4是本实用新型的下底面示意图；
附图5是本实用新型的左侧面示意图；
附图6是本实用新型的右侧面示意图；
附图7是本发明实施例的反射系数仿真结果示意图；
附图8为本发明实施例A面在金属环境下的辐射方向示意图，其中phi＝0°时表示垂直方向的视图，phi＝90°时表示水平方向的视图；
附图9为本发明实施例B面在金属环境下的辐射方向示意图，其中phi＝0°时表示垂直方向的视图，phi＝90°时表示水平方向的视图；
图中：1-弯折的天线辐射回路结构；2-芯片；3-第一层泡棉基板；4-金属辐射片；5-第二层泡棉基板。
本发明的实施方式
如图所示，一种双面抗金属小型化RFID标签天线，所述天线为三层的一体式折叠结构，折叠结构的各层之间以弹性的基板为支撑；所述天线的天线辐射臂包括由弯折的天线辐射回路结构1、折叠形态的金属辐射片4组成的偶极子标签；所述偶极子标签的中部搭载有RFID标签天线的芯片2；所述金属辐射片表面设有用于调整标签天线阻抗的弯曲金属回路；当金属辐射片处于折叠形态并在金属环境下使用时，其折叠形态两面的金属回路性能相同。
所述基板为以泡棉成型的介质基板；所述金属辐射片为以铜箔或铝箔经腐蚀法成型的金属面。
所述弯折的金属回路的弯折形状为矩形或带弧度的矩形；所述金属辐射片的形状为矩形或带槽矩形。
当天线处于折叠形态时，折叠结构各层的层间距为固定值，折叠形态的金属辐射片形成位于天线折叠形态最上方和最下方的相同的具备抗金属特性的金属辐射面。
所述金属辐射片的总长度为天线工作频段中心频率的四分之一波长对应的长度或其整数倍。
所述金属辐射片的总长度与标签天线搭载的芯片型号相匹配。
所述基板包括厚度为相同固定值的第一层泡棉基板3和第二层泡棉基板5，第一层泡棉基板和第二层泡棉基板的形状与基板上的金属辐射片相同。
当金属辐射片处于折叠形态并在金属环境下使用时，其折叠形态两面的金属回路的抗金属特性的性能相同。
所述天线处于折叠形态时，其尺寸为42×13mm×2mm。
以上参照附图说明了本发明的优选实施例，并非因此局限本发明的权利范围。本领域技术人员不脱离本发明的范围和实质内所作的任何修改、等同替换和改进，均应在本发明的权利范围之内。

Claims (9)

  1. 一种双面抗金属小型化RFID标签天线，其特征在于：所述天线为三层的一体式折叠结构，折叠结构的各层之间以弹性的基板为支撑；所述天线的天线辐射臂包括由弯折的天线辐射回路结构、折叠形态的金属辐射片组成的偶极子标签；所述偶极子标签的中部搭载有RFID标签天线的芯片；所述金属辐射片表面设有用于调整标签天线阻抗的弯曲金属回路；当金属辐射片处于折叠形态并在金属环境下使用时，其折叠形态两面的金属回路性能相同。
  2. 根据权利要求1所述的一种双面抗金属小型化RFID标签天线，其特征在于：所述基板为以泡棉成型的介质基板；所述金属辐射片为以铜箔或铝箔经腐蚀法成型的金属面。
  3. 根据权利要求1所述的一种双面抗金属小型化RFID标签天线，其特征在于：所述弯折的金属回路的弯折形状为矩形或带弧度的矩形；所述金属辐射片的形状为矩形或带槽矩形。
  4. 根据权利要求3所述的一种双面抗金属小型化RFID标签天线，其特征在于：当天线处于折叠形态时，折叠结构各层的层间距为固定值，折叠形态的金属辐射片形成位于天线折叠形态最上方和最下方的相同的具备抗金属特性的金属辐射面。
  5. 根据权利要求4所述的一种双面抗金属小型化RFID标签天线，其特征在于：所述金属辐射片的总长度为天线工作频段中心频率的四分之一波长对应的长度或其整数倍。
  6. 根据权利要求4所述的一种双面抗金属小型化RFID标签天线，其特征在于：所述金属辐射片的总长度与标签天线搭载的芯片型号相匹配。
  7. 根据权利要求4所述的一种双面抗金属小型化RFID标签天线，其特征在于：所述基板包括厚度为相同固定值的第一层泡棉基板和第二层泡棉基板，第一层泡棉基板和第二层泡棉基板的形状与基板上的金属辐射片相同。
  8. 根据权利要求1所述的一种双面抗金属小型化RFID标签天线，其特征在于：当金属辐射片处于折叠形态并在金属环境下使用时，其折叠形态两面的金属回路的抗金属特性的性能相同。
  9. 根据权利要求1所述的一种双面抗金属小型化RFID标签天线，其特征在于：所述天线处于折叠形态时，其尺寸为42×13mm×2mm。
PCT/CN2021/122956 2021-07-19 2021-10-11 一种双面抗金属小型化rfid标签天线 WO2023000509A1 (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117933290A (zh) * 2024-01-24 2024-04-26 温州格洛博电子有限公司 一种柔性抗金属rfid标签

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115332763B (zh) * 2022-09-02 2024-06-25 福州大学 折叠型超高频rfid双面抗金属标签天线

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090160653A1 (en) * 2007-12-21 2009-06-25 Industrial Technology Research Institute Anti-metal RFID tag and manufacturing method thereof
CN106981722A (zh) * 2017-05-10 2017-07-25 江苏明联电子科技有限公司 一种柔性抗金属rfid标签天线
CN110768002A (zh) * 2019-10-15 2020-02-07 广东思谷智能技术有限公司 一种抗金属射频识别标签天线
CN210516987U (zh) * 2019-10-14 2020-05-12 广东鑫业智能标签应用有限公司 一种微带天线及柔性抗金属电子标签

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090160653A1 (en) * 2007-12-21 2009-06-25 Industrial Technology Research Institute Anti-metal RFID tag and manufacturing method thereof
CN106981722A (zh) * 2017-05-10 2017-07-25 江苏明联电子科技有限公司 一种柔性抗金属rfid标签天线
CN210516987U (zh) * 2019-10-14 2020-05-12 广东鑫业智能标签应用有限公司 一种微带天线及柔性抗金属电子标签
CN110768002A (zh) * 2019-10-15 2020-02-07 广东思谷智能技术有限公司 一种抗金属射频识别标签天线

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZHENG JINGHANG; YUAN JIADE; CHEN ZHIZHANG: "A Compact UHF RFID Tag Antenna for Anti-Metal Used on Both Sides", 2020 CROSS STRAIT RADIO SCIENCE & WIRELESS TECHNOLOGY CONFERENCE (CSRSWTC), IEEE, 13 December 2020 (2020-12-13), pages 1 - 3, XP033886351, DOI: 10.1109/CSRSWTC50769.2020.9372734 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117933290A (zh) * 2024-01-24 2024-04-26 温州格洛博电子有限公司 一种柔性抗金属rfid标签

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