A Universal UHF RFID Reader Antenna

被引：187

作者：

Chen, Zhi Ning ^{[1
]}

Qing, Xianming ^{[1
]}

Chung, Hang Leong ^{[1
]}

机构：

[1] ASTAR, Inst Infocomm Res, Singapore 138632, Singapore

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2009年 / 57卷 / 05期

关键词：

Axial ratio (AR); broadband antenna; circularly polarized (CP); RF identification (RFID); sequential feed; ultra high frequency (UHF); CIRCULARLY-POLARIZED PATCH; MICROSTRIP ANTENNA; BANDWIDTH; DESIGN; PROBE;

D O I：

10.1109/TMTT.2009.2017290

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A broadband circularly polarized patch antenna is proposed for universal ultra-high-frequency (UHF) RF identification (RFID) applications. The antenna is composed of two corner-truncated patches and a suspended microstrip line with open-circuited termination. The main patch is fed by four probes which are sequentially connected to the suspended microstrip feed line. The measurement shows that the antenna achieves a return loss of -15 dB, gain of 8.3 dBic, axial ratio (AR) of 3 dB, and 3-dB AR beamwidth of 75 degrees over the UHF band of 818-964 MHz or 16.4%. Therefore, the proposed antenna is universal for UHF RFID applications worldwide at the UHF band of 840-960 MHz. In addition, a parametric study is conducted to facilitate the design and optimization processes for engineers.

引用

页码：1275 / 1282

页数：8

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