A Passive RFID Tag Antenna Installed in a Recessed Cavity in a Metallic Platform

被引：45

作者：

Kim, Dongho ^{[1
]}

Yeo, Junho ^{[2
]}

机构：

[1] Elect & Telecommun Res Inst, Antenna Res Team, Taejon 305700, South Korea

[2] Daegu Univ, Sch Comp & Commun Engn, Gyeongbuk 712714, South Korea

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2010年 / 58卷 / 12期

关键词：

Antenna; genetic algorithm (GA); metallic cavity; RFID; tag; EQUIVALENT-CIRCUIT; DIPOLE ANTENNA; BAND; PERFORMANCE; OBJECTS; AMC;

D O I：

10.1109/TAP.2010.2078438

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 passive RFID tag antenna in a recessed cavity in metallic objects such as vehicles, air craft, and metallic containers, and an impedance matching technique for this configuration are proposed. The proposed tag antenna can be considered as a cavity-backed antenna and it is comprised of a bowtie antenna installed in a recessed cubic volume in a large metallic object, and the input impedance of the bowtie antenna can be easily matched by adjusting the coupling effect between the tag antenna and the cavity. Main parameters affecting the coupling are the dimensions of the cavity and the location of the bowtie antenna inside the cavity. For more practical analysis of the impedance matching process, an equivalent-circuit model consisting of several lumped elements is introduced and each element is optimized using a genetic algorithm (GA). Experimental results show that the maximum reading distance of the proposed tag antenna with optimized dimensions can be improved about 3.2 times compared to a commercial RFID tag.

引用

页码：3814 / 3820

页数：7

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