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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2023-02-08
Fundamental Study on Comb-Line Antennas Modified with Loop Elements for Increased Axial Ratio Bandwidth
By
Kazuhide Hirose,

    Prof. Kazuhide Hirose

    College of Engineering

    Shibaura Institute of Technology

    Japan

    Homepage

Yuto Kikkawa,

    Dr. Yuto Kikkawa

    College of Engineering

    Shibaura Institute of Technology

    Japan

    Homepage

Susumu Tsubouchi,

    Dr. Susumu Tsubouchi

    College of Engineering

    Shibaura Institute of Technology

    Japan

    Homepage

Hisamatsu Nakano

    Prof. Hisamatsu Nakano

    Engineering

    Hosei University

    Japan

    Homepage

Progress In Electromagnetics Research M, Vol. 115, 59-69, 2023
doi:10.2528/PIERM22123001 | Google Scholar

Abstract
We study three comb-line antennas to increase the bandwidth for a 3 dB axial ratio criterion. Each antenna comprises linear radiation elements with loops and a coplanar feedline above the ground plane. First, we analyze a reference antenna with a straight feedline using the method of moments. Next, the straight feedline is transformed into a round one for a sequential rotation technique. It is found that the antenna has an increased bandwidth of 30%, which is three times as wide as that of the reference antenna. Last, we propose a novel antenna with a straight feedline. It is revealed that the antenna shows a 3 dB gain drop bandwidth of 29% (40% for the axial ratio bandwidth). The simulated results are validated by experimental work.
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Citation
Kazuhide Hirose, Yuto Kikkawa, Susumu Tsubouchi, and Hisamatsu Nakano, "Fundamental Study on Comb-Line Antennas Modified with Loop Elements for Increased Axial Ratio Bandwidth," Progress In Electromagnetics Research M, Vol. 115, 59-69, 2023.
doi:10.2528/PIERM22123001
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