多环形结构超高频RFID近场天线

陈榕; 谢维华; 袁家德

doi:10.11959/j.issn.2096-3750.2025.00459

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多环形结构超高频RFID近场天线

理论与技术 | 更新时间：2026-01-26

- 多环形结构超高频RFID近场天线
- A multi-ring UHF near-field RFID reader antenna
- 物联网学报 2025年9卷第3期页码：104-111
- 作者机构：
  
  福州大学物理与信息工程学院，福建福州 350108
- 作者简介：
  
  [ "陈榕（2000‒ ），男，福州大学物理与信息工程学院硕士生，主要研究方向为射频识别读写器天线。" ]
  [ "谢维华（1979‒ ），男，博士，福州大学物理与信息工程学院研究员，主要研究方向为卫星导航、通信应用等。" ]
  [ "袁家德（1974‒ ），男，博士，福州大学物理与信息工程学院教授，主要研究方向为通信天线、射频识别等。" ]
- 基金信息：
  
  福建省高校产学合作项目(2023H6004);福州市科技项目(2023-P-001)
- DOI：10.11959/j.issn.2096-3750.2025.00459
  中图分类号： TN828.4
- 收稿：2024-09-13，
  
  修回：2025-04-19，
  
  纸质出版：2025-09-10
- 稿件说明：
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陈榕,谢维华,袁家德.多环形结构超高频RFID近场天线[J].物联网学报,2025,09(03):104-111.

CHEN Rong,XIE Weihua,YUAN Jiade.A multi-ring UHF near-field RFID reader antenna[J].Chinese Journal on Internet of Things,2025,09(03):104-111.
陈榕,谢维华,袁家德.多环形结构超高频RFID近场天线[J].物联网学报,2025,09(03):104-111. DOI： 10.11959/j.issn.2096-3750.2025.00459.

CHEN Rong,XIE Weihua,YUAN Jiade.A multi-ring UHF near-field RFID reader antenna[J].Chinese Journal on Internet of Things,2025,09(03):104-111. DOI： 10.11959/j.issn.2096-3750.2025.00459.

摘要

设计了一种多环形结构超高频射频识别（RFID

radio frequency identification）阅读器近场天线。天线整体结构呈圆形，由8个扇形辐射贴片旋转分布组成，通过扇形辐射贴片间的紧耦合和加载寄生弧形贴片，实现了天线表面电流旋向相同，能够在识别区域内产生较均匀的磁场和多极化的电场。天线直径为130 mm，印制在厚度为1.6 mm的阻燃4级（FR-4

flame retardant 4）介质基板上。测试结果表明，端口反射系数|

-10 dB的频带宽度为904~932 MHz，在天线上方直径为130 mm的圆形区域内可产生较均匀的磁场；采用Impinj E710阅读器进行标签测试，在30 dBm的输出功率下，磁耦合环形标签J41的最远100%读取距离为16 cm；所提天线能产生多极化电场，对于不同方向摆放的电极化标签具备相近的读取能力。

Abstract

A near-field antenna for ultra-high frequency radio frequency identification (RFID) reader with a multi-ring structure and uniform magnetic field was designed. The antenna was circular in shape and consisted of 8 fan-shaped radiating patches distributed in rotation. Through coupling between fan-shaped radiating patches and loading parasitic arc-shaped patches

the surface current of the antenna showed the same rotation direction

which could generate a relatively uniform magnetic field and a multi-polarized electric field in the identification area. The antenna had a diameter of 130 mm and was printed on a flame retardant 4 (FR-4) dielectric substrate with a thickness of 1.6 mm. The measured results show that the bandwidth of the reflection coefficient |

-10 dB is 904~932 MHz. A relatively uniform magnetic field can be generated within a circular area with a diameter of 130 mm above the antenna. At a power output of 30 dBm

the farthest reading distance for the 100% identification rate of the magnetic coupled ring tag J41 is 16 cm when the Impinj E710 reader is used for tag testing. The proposed antenna can generate a multi-polarized electric field that exhibits similar readability for tags placed in different directions.

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references

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