A Wideband Switched-Beam Antenna Array Fed by Compact Single-Layer Butler Matrix

被引：21

作者：

Wen, Jia Min ^{[1
]}

Wang, Chuang Kai ^{[1
]}

Hong, Wonbin ^{[2
]}

Pan, Yong Mei ^{[3
]}

Zheng, Shao Yong ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Elect & Informat Technol, Guangzhou 510006, Peoples R China

[2] Pohang Univ Sci & Technol, Dept Elect Engn, Pohang 37673, South Korea

[3] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510630, Peoples R China

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2021年 / 69卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Antenna array; arbitrary phase-difference coupler; Butler matrix; switched-beam; wideband; COUPLER;

D O I：

10.1109/TAP.2021.3060040

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：

This communication describes a wideband switched-beam antenna fed by a compact single-layer beamforming network. First, a novel hybrid coupler structure that can provide an arbitrary phase difference over a bandwidth larger than 58% is proposed with the theoretical analysis. Based on this compact coupler configuration, a wideband 4 x 4 Butler matrix is devised with the need for standalone phase shifters and crossovers eliminated. The proposed Butler matrix achieves the widest bandwidth among the single-layer structures up to present. Consequently, a wideband switched-beam antenna array is realized by utilizing the log-periodic endfire antenna elements with bowtie dipoles on the Butler matrix. For validation, a broadband switched-beam antenna array is designed, fabricated, and measured. A stable beamforming performance is ascertained with a gain variation smaller than +/- 1.66 dB over a bandwidth from 1.98 to 3.14 GHz.

引用

页码：5130 / 5135

页数：6

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