A Fundamental Study on Circularly Polarized Double-Loop Antennas with Quasi-Two Sources

Two concentric double-loop antennas were analyzed using the moment method to increase the 3 dB axial ratio bandwidth. Each antenna has a driven loop connected to a branched feedline that is vertical to the ground plane. First, a parasitic loop was added outside of the driven one with a spacing of S....

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Bibliographic Details
Published in:Applied sciences Vol. 14; no. 16; p. 6997
Main Authors: Hirose, Kazuhide, Hirose, Mitsuki, Mita, Shintaro, Nakano, Hisamatsu
Format: Journal Article
Language:English
Published: Basel MDPI AG 01.08.2024
Subjects:
Antennas
Antennas (Electronics)
Bandwidths
circular polarization
Design
loop antenna
Parasites
Radiation
wideband antenna
ISSN:2076-3417, 2076-3417
Online Access:Get full text
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Summary:Two concentric double-loop antennas were analyzed using the moment method to increase the 3 dB axial ratio bandwidth. Each antenna has a driven loop connected to a branched feedline that is vertical to the ground plane. First, a parasitic loop was added outside of the driven one with a spacing of S. It was found that the axial ratio bandwidth has a maximum value of 23% for S = 0.02 wavelengths. Next, we moved a parasitic loop inside of the driven one. It was revealed that the antenna shows an axial ratio bandwidth of 40%, which is three times as wide as that of a single-loop antenna. The analysis results were verified with experimental work.
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content type line 14
ISSN:2076-3417
2076-3417
DOI:10.3390/app14166997