物联网学报2025，Vol.9Issue(3)：104-111,8.DOI:10.11959/j.issn.2096-3750.2025.00459
多环形结构超高频RFID近场天线
A multi-ring UHF near-field RFID reader antenna
摘要
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 radi-ating 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|S11|<-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 read-ability for tags placed in different directions.关键词
射频识别/近场天线/磁场均匀/多环形结构Key words
RFID/near field antenna/uniform magnetic field/multi-ring structure分类
信息技术与安全科学引用本文复制引用
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,2025,9(3):104-111,8.基金项目
福建省高校产学合作项目(No.2023H6004) （No.2023H6004）
福州市科技项目(No.2023-P-001)The University Industry Cooperation Project of Fujian Province(No.2023H6004),The Science and Technology Project of Fuzhou(No.2023-P-001) （No.2023-P-001）
