Compact Circularly Polarized Tag Antenna based on EBG Structure for Metallic Objects

被引：0
|
作者：
Gao, Gege [1 ,2 ]
Li, Xiuping [1 ,2 ]
Zhu, Hua [1 ,2 ]
Zhang, Ning [1 ,2 ]
Qi, Zhenguo [1 ,2 ]
机构：
[1] Beijing Univ Posts & Telecommun, Sch Elect Engn, Beijing 100876, Peoples R China
[2] Beijing Key Lab Work Safety Intelligent Monitorin, Beijing, Peoples R China
来源：
PROCEEDINGS OF THE 2019 IEEE ASIA-PACIFIC MICROWAVE CONFERENCE (APMC) | 2019年
基金：
中国国家自然科学基金;
关键词：
radio frequency identification (RFID); tag antenna; circularly polarized (CP); electromagnetic band gap (EBG); polarization-dependent; DESIGN;
D O I：
10.1109/apmc46564.2019.9038850
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this paper, a compact circularly polarized (CP) radio frequency identification (RFID) tag antenna based on the electromagnetic band gap (EBG) structure is proposed for metallic objects. The compact EBG structure is composed of two-layer patches with offset vias. By inserting square loops into the patches, a reflection phase of +100 degrees for X-polarization and -89 degrees for V-polarization at 915 MHz is achieved. A novel cross-dipole antenna is designed with meander arms and modified T-matching. The simulated-15 dB impedance bandwidth of the tag antenna is 100 MHz (860-960 MHz), and its corresponding 3 dB axial-ratio (AR) bandwidth is 6 MHz (917-923 MHz). In theory, the proposed tag antenna can provide a reading distance of 5.08 m when it is mounted on the metallic surface.
引用
收藏
页码：1733 / 1735
页数：3
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