Adjustable axial ratio of single-layer circularly polarised patch antenna for portable RFID reader

被引：15

作者：

Lin, Y-F. ^{[1
]}

Chen, H-M. ^{[1
]}

Pan, S-C. ^{[2
]}

Kao, Y-C. ^{[1
]}

Lin, C-Y. ^{[1
]}

机构：

[1] Natl Kaohsiung Univ Appl Sci, Inst Photon & Commun, Kaohsiung 807, Taiwan

[2] Sue Te Univ, Dept Comp & Commun, Kaohsiung 824, Taiwan

来源：

ELECTRONICS LETTERS | 2009年 / 45卷 / 06期

关键词：

RING MICROSTRIP ANTENNAS; DESIGN;

D O I：

10.1049/el.2009.3569

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 novel single-layer, proximity-fed technique for a slot-coupled circularly polarised square patch antenna operated in the ultra-high frequency band is presented. In the proposed design a pair of radiating square patches with a cross-slot and a microstrip feed line are both etched on the top of a microwave substrate, and a coupling arrowshaped slot is etched on the bottom of this substrate. Simulated and measured results indicate that the proposed structure can achieve circular polarisation operation. Proper adjustment of the feed coupling gap distance between the patch and the feed line results in good impedance matching and circularly polarised radiation, and an impedance bandwidth (VSWR <= 2) of about 3.74% and a 3 dB axial-ratio bandwidth of about 1.62% were obtained.

引用

页码：290 / 291

页数：2

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