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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2014-08-12
Low-Profile Wideband Circularly Polarized Patch Antenna Using Asymmetric Feeding
By
Yang-Tao Wan,

    Dr. Yang-Tao Wan

    Xidian University

    China

    Homepage

Fu-Shun Zhang,

    Dr. Fu-Shun Zhang

    Science and Technology on Antenna and Microwave Laboratory

    Xidian University

    China

    Homepage

Dan Yu,

    Dr. Dan Yu

    National Key Laboratory of Antennas and Microwave Technology

    Xidian University

    China

    Homepage

Wen-Feng Chen,

    Dr. Wen-Feng Chen

    Science and Technology on Antenna and Microwave Laboratory

    Xidian University

    China

    Homepage

Tian Li

    Dr. Tian Li

    Science and Technology on Antenna and Microwave Laboratory

    Xidian University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 48, 21-26, 2014
doi:10.2528/PIERL14060506 | Google Scholar

Abstract
A low-profile wideband circularly polarized aperture stacked patch (ASP) antenna without air dielectric layers is presented. The new circular ASP antenna, which is fed by two orthogonal dual-offset lines through an asymmetric crossed slot, delivers a wide bandwidth of 80% for the 10-dB return loss and similar input impedance characteristics for the two ports. Then, a novel broadband 90° hybrid feed network is employed to achieve good impedance matching, balanced power splitting and consistent 90° (±9°) phase shifting across the wide operating band. The two unbalanced feed lines are connected to the respective ports of the feed network comprising a three-section Wilkinson power divider and a broadband 90° phase shifter. It is found that the proposed antenna can achieve a measured impedance bandwidth of 91.3% (2.44-6.54 GHz), a measured 3-dB axial ratio (AR) bandwidth of 86.4% (2.5-6.3 GHz), and a measured gain bandwidth of 60.9% from 3.2 to 6.0 GHz for the gain >4 dBic. In addition, a comparison between the proposed wideband CP antenna and related wideband CP and ASP antennas in the literature is made.
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Citation
Yang-Tao Wan, Fu-Shun Zhang, Dan Yu, Wen-Feng Chen, and Tian Li, "Low-Profile Wideband Circularly Polarized Patch Antenna Using Asymmetric Feeding," Progress In Electromagnetics Research Letters, Vol. 48, 21-26, 2014.
doi:10.2528/PIERL14060506
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