Compact circularly polarized circular microstrip tag antenna mountable on metallic surface

被引：4
|
作者：
Kuo, Shang-Huang [1 ]
Chen, Horng-Dean [1 ]
Pan, Shan-Cheng [2 ]
Tseng, Yen-Ming [1 ]
Jheng, Jing-Lun [1 ]
机构：
[1] Natl Kaohsiung Normal Univ, Dept Optoelect & Commun Engn, Kaohsiung 82444, Taiwan
[2] Shu Te Univ, Dept Comp & Commun, Kaohsiung 82445, Taiwan
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2013年 / 55卷 / 05期
关键词：
microstrip antenna; tag antenna; circular polarization; radio frequency identification (RFID);
D O I：
10.1002/mop.27480
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 compact circularly polarized circular microstrip tag antenna designed for RFID UHF band is presented.The proposed tag antenna is excited by using microstrip-line coupling-feed method. By choosing the proper lengths of two short-circuited arc microstrip lines and its coupling distance, good complex impedance matching can be obtained. Moreover, a cross slot of unequal arm lengths embedded in a circular patch is used to achieve compact circularly polarized operation. The measured 10-dB return-loss bandwidth of the tag antenna is 40 MHz (901941 MHz), while the 3-dB axial-ratio bandwidth is 6 MHz (912918 MHz). Further experiment shows that the tag antenna can provide a significantly increased reading range when mounted on a metallic surface. (c) 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:11071112, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27480
引用
收藏
页码：1107 / 1112
页数：6
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