Axial-Ratio-Bandwidth Enhancement of a Microstrip-Line-Fed Circularly Polarized Annular-Ring Slot Antenna

被引：49

作者：

Sze, Jia-Yi ^{[1
]}

Chen, Wei-Hung ^{[1
]}

机构：

[1] Natl Def Univ, Dept Elect & Elect Engn, Chung Cheng Inst Technol, Tao Yuan 335, Taiwan

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2011年 / 59卷 / 07期

关键词：

Annular-ring slot antenna; axial ratio; circular polarization; DESIGN; PATCH;

D O I：

10.1109/TAP.2011.2152314

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：

The design of a new microstrip-line-fed wideband circularly polarized (CP) annular-ring slot antenna (ARSA) is proposed. Compared with existing ring slot antennas, the ARSAs designed here possess much larger CP bandwidths. The main features of the proposed design include a wider ring slot, a pair of grounded hat-shaped patches, and a deformed bent feeding microstrip line. The ARSAs designed using FR4 substrates in the L and S bands have 3-dB axial-ratio bandwidths (ARBWs) of as large as 46% and 56%, respectively, whereas the one using an RT5880 substrate in the L band, 65%. In these 3-dB axial-ratio bands, impedance matching with VSWR <= 2 is also achieved.

引用

页码：2450 / 2456

页数：7

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