Broadband Circularly Polarized Beam-Steering Antenna Array

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...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2013-03, Vol.61 (3), p.1475-1479
Main Authors: CHANGRONG LIU, SHAOQIU XIAO, GUO, Yong-Xin, BAI, Yan-Ying, WANG, Bing-Zhong
Format: Article
Language:English
Subjects:
Antenna array
Antenna arrays
Antenna measurements
Antennas
Applied sciences
Arrays
Bandwidth
beam steering
butler matrix
Circuit properties
circular polarization
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Frequency measurement
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Radiocommunications
rotation technique
Telecommunications
Telecommunications and information theory
wideband antennas
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Summary: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 |S 11 |
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2012.2230235