A LOOP ANTENNA WITH ENLARGED BANDWIDTH OF CIRCULAR POLARIZATION --- ITS APPLICATION IN A COMB-LINE ANTENNA

A LOOP ANTENNA WITH ENLARGED BANDWIDTH OF CIRCULAR POLARIZATION --- ITS APPLICATION IN A COMB-LINE ANTENNA

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 anten...

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Veröffentlicht in:Progress in electromagnetics research C Pier C 2020-08, Vol.105, p.175-184
Hauptverfasser: Hirose, Kazuhide, Nakatsu, Motoshi, Nakano, Hisamatsu
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Antennas (Electronics)
Design and construction
Polarization (Nuclear physics)
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Nakatsu, Motoshi
Nakano, Hisamatsu
description 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.
doi_str_mv 10.2528/PIERC20071902
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subjects Antennas (Electronics)
Design and construction
Polarization (Nuclear physics)
title A LOOP ANTENNA WITH ENLARGED BANDWIDTH OF CIRCULAR POLARIZATION --- ITS APPLICATION IN A COMB-LINE ANTENNA
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