UHF/UWB Tag Antenna of Circular Polarization

被引：19

作者：

Gao, Xiang ^{[1
]}

Shen, Zhongxiang ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2016年 / 64卷 / 09期

关键词：

Circularly polarized (CP) antenna; dual-band tag antenna; ultrahigh-frequency (UHF); ultrawideband (UWB); RFID TAG; METALLIC SURFACE; SPIRAL ANTENNA; DIPOLE ANTENNA; UHF; IMPEDANCE; DESIGN; SYSTEMS;

D O I：

10.1109/TAP.2016.2583547

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 dual-band circularly polarized (CP) tag antenna is presented in this paper, which combines ultrahigh-frequency (UHF) and ultrawideband (UWB) operations for radio-frequency identification (RFID) and high-precision localization applications. The proposed antenna consists of two CP radiating elements with separated ports, where the UHF element is a planar loop antenna loaded with two pairs of meander lines of different dimensions for compactness and CP radiation, while the UWB element is a modified Archimedean spiral antenna with a tapered metallization ratio and encircled by the UHF loop. In addition, a miniaturized shunt-stub is employed in the UHF element to realize conjugate matching between the antenna and the UHF RFID chip. Experimental characterization of a fabricated prototype has validated the design, which shows that the proposed antenna exhibits very good radiation performance at both the bands, with -10 dB power reflection bandwidths of 0.86-0.975 GHz and 2.6-12 GHz, and 3 dB axial-ratio bandwidths of 0.911-0.938 GHz and 3.1-11.1 GHz, respectively. This antenna can find applications in RFID and indoor positioning systems.

引用

页码：3794 / 3802

页数：9

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