volume | PIER Journals

2020-09-20

A Loop Antenna with Enlarged Bandwidth of Circular Polarization --- Its Application in a Comb-Line Antenna

Kazuhide Hirose,

Prof. Kazuhide Hirose

College of Engineering

Shibaura Institute of Technology

Japan

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Motoshi Nakatsu,

Dr. Motoshi Nakatsu

Shibaura Institute of Technology

Japan

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Hisamatsu Nakano

Prof. Hisamatsu Nakano

Engineering

Hosei University

Japan

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Progress In Electromagnetics Research C, Vol. 105, 175-184, 2020

doi:10.2528/PIERC20071902

Abstract

Using the moment method, we analyze a loop antenna with a perturbation segment in the presence of a ground plane. First, the radiation characteristics versus loop height above the ground plane are investigated. It is found that as the loop height increases to more than 0.2 wavelengths a novel antenna other than a conventional one can exist, showing an enlarged bandwidth of 9% for a 3 dB axial-ratio criterion. Next, the radiation mechanism of the novel antenna is compared with that of the conventional one. Last, the novel loop is used in a comb-line antenna as a radiation element. It is found that the CP wave bandwidth is five times as wide as that of a conventional comb-line antenna. The analysis results are verified by experimental work.

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Kazuhide Hirose, Motoshi Nakatsu, and Hisamatsu Nakano, "A Loop Antenna with Enlarged Bandwidth of Circular Polarization --- Its Application in a Comb-Line Antenna," Progress In Electromagnetics Research C, Vol. 105, 175-184, 2020.
doi:10.2528/PIERC20071902

References

1. Li, R., N. A. Bushyager, J. Laskar, and M. M. Tentzeris, "Determination of reactance loading for circularly polarized circular loop antennas with a uniform traveling-wave current distribution," IEEE Trans. Antennas Propag., Vol. 53, No. 12, 3920-3929, Dec. 2005.
doi:10.1109/TAP.2005.859767

2. Sumi, M., K. Hirasawa, and S. Shi, "Two rectangular loops fed in series for broadband circular polarization and impedance matching," IEEE Trans. Antennas Propag., Vol. 52, No. 2, 551-554, Feb. 2004.
doi:10.1109/TAP.2004.823876

3. Hirose, K., T. Shibasaki, Y. Yoshida, and H. Nakano, "Ladder antennas for dual circular polarization," IEEE Antennas Wireless Propag. Lett., Vol. 11, 1174-1177, 2012.
doi:10.1109/LAWP.2012.2220751

4. Hirose, K., K. Okiyama, and H. Nakano, "A loop antennas with wideband circular polarization," Proc. IEEE Antennas Propag. Society Int. Symp., 503-504, 2017.

5. Harrington, R. F., Field Computation by Moment Methods, Macmillan, New York, NY, USA, 1968.

6. Zhang, L., W. Zhang, and Y. P. Zhang, "Microstrip grid and comb array antennas," IEEE Trans. Antennas Propag., Vol. 59, No. 11, 4077-4084, Nov. 2011.
doi:10.1109/TAP.2011.2164216

7. Cameron, T. R., A. T. Sutinjo, and M. Okoniewski, "A circularly polarized broadside radiating `herringbone’ array design with the leaky-wave approach," IEEE Antennas Wireless Propag. Lett., Vol. 9, 826-829, 2010.
doi:10.1109/LAWP.2010.2066950

8. Hirose, K., D. Yamada, and H. Nakano, "A modified comb-line antenna radiating a circularly polarized wave," Trans. IEICE, Vol. J86-B, No. 10, 2174-2181, Oct. 2003.