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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2017-05-21
Broadband CPW-Fed Circularly Polarized Planar Monopole Antenna with Inverted-L Strip and Asymmetric Ground Plane for WLAN Application
By
Qiang Chen,

    Dr. Qiang Chen

    Air and Missile Defense College of Air Force Engineering University

    China

    Homepage

Hou Zhang,

    Dr. Hou Zhang

    Air and Missile Defense College

    Air Force Engineering University

    China

    Homepage

Lu-Chun Yang,

    Dr. Lu-Chun Yang

    China Mobile (Shenzhen) Limited

    China

    Homepage

Bin Xue,

    Dr. Bin Xue

    School of Information and Navigation

    Air Force Engineering University

    China

    Homepage

Xue-Liang Min

    Dr. Xue-Liang Min

    Missile Institute of Airforce Engineering University

    China

    Homepage

Progress In Electromagnetics Research C, Vol. 74, 91-100, 2017
doi:10.2528/PIERC17021203 | Google Scholar

Abstract
A novel broadband circularly polarized planar monopole antenna fed by coplanar waveguide (CPW) is proposed and fabricated. The proposed antenna consists of a rectangular monopole, an inverted-L strip and an asymmetric ground plane with cutting a horizontal slit on the right ground plane. Firstly, a narrow circularly polarized (CP) radiation at the upper band can be achieved by utilizing the asymmetric ground plane. Then, an inverted-L strip is introduced to obtain broadband CP characteristic matched with wide impedance bandwidth. The measured results demonstrate that a 10-dB bandwidth of 58.8% from 4.8 to 8.8 GHz and a 3-dB axial-ratio bandwidth (ARBW) of 47.8% from 5.375 to 8.75 GHz can be achieved which can completely cover the WLAN (5.725-5.85 GHz) band. Additionally, a 10-dB impedance bandwidth of 24% (3.3-4.2 GHz) with linear polarization is also obtained which can completely cover the WiMAX (3.3-3.7 GHz) bands. In additional, to explain the mechanism of dual-band CP operation, the analysis of magnetic fields distributions and a parametric study of the design are given. Compared to other recent works, a simpler structure, wider axial ratio and impedance bandwidths and a more compact size are the key features of the proposed antenna.
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Citation
Qiang Chen, Hou Zhang, Lu-Chun Yang, Bin Xue, and Xue-Liang Min, "Broadband CPW-Fed Circularly Polarized Planar Monopole Antenna with Inverted-L Strip and Asymmetric Ground Plane for WLAN Application," Progress In Electromagnetics Research C, Vol. 74, 91-100, 2017.
doi:10.2528/PIERC17021203
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