Broadband Circularly Polarized Beam-Steering Antenna Array

Author

Changrong Liu ; Shaoqiu Xiao ; Yong-Xin Guo ; Yan-Ying Bai ; Bing-Zhong Wang

Author_Institution

Instn. of Appl. Phys., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

61

Issue

3

fYear

2013

fDate

3/1/2013 12:00:00 AM

Firstpage

1475

Lastpage

1479

Abstract

A wideband circular polarized (CP) switched-beam patch antenna array is presented in this communication. The switched-beam system consists of four two-section branch-line couplers, two wideband 45 phase shifters and 1 × 4 proximity-coupled L-probe feeding CP microstrip patch antenna array. With such an arrangement, the proposed array can obtain a wide axial ratio (AR) bandwidth than that of conventional switched-beam CP antenna array. Measured results showed this array has an impedance bandwidth over a frequency range of 4.04-5.78 GHz (~36%) for |S₁₁| <; -10 dB and AR bandwidth from 4.3 to 5.75 GHz (~29%) for AR <; 3dB when the main beam of array is scanned to different four directions.

Keywords

antenna arrays; beam steering; broadband antennas; microstrip antenna arrays; phase shifters; axial ratio bandwidth; broadband circularly polarized beam-steering antenna array; frequency 4.04 GHz to 5.78 GHz; impedance bandwidth; proximity-coupled L-probe feeding CP microstrip patch antenna array; two-section branch-line couplers; wideband circular polarized switched-beam patch antenna array; wideband phase shifters; Antenna arrays; Antenna measurements; Arrays; Bandwidth; Frequency measurement; Antenna array; beam steering; butler matrix; circular polarization; rotation technique; wideband antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2012.2230235

Filename

6363547