A Wideband Switched-Beam Antenna Array Fed by Compact Single-Layer Butler Matrix
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SCOPUS
- Title
- A Wideband Switched-Beam Antenna Array Fed by Compact Single-Layer Butler Matrix
- Authors
- Jia Min Wen; HONG, WONBIN; Chuang Kai Wang; Yong Mei Pan; Shao Yong Zheng
- Date Issued
- 2021-02
- Publisher
- Institute of Electrical and Electronics Engineers
- Abstract
- This paper describes a wideband switched-beam antenna fed by a compact single-layer beamforming network. Firstly, a novel hybrid coupler structure which can provide an arbitrary phase difference over a bandwidth larger than 58proposed with theoretical analysis. Based on this compact coupler configuration, a wideband 4W4 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 GHz to 3.14 GHz.
- Keywords
- COUPLER
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/106884
- DOI
- 10.1109/TAP.2021.3060040
- ISSN
- 0018-926X
- Article Type
- Article
- Citation
- IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol. 69, no. 8, page. 5130 - 5135, 2021-02
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