A Loop-Line Antenna with Enhanced Bandwidth of Circular Polarization

We investigate a circularly polarized (CP) transmission-line antenna composed of loop radiation elements, called a loop-line antenna. To enhance the CP wave bandwidth, an isolated loop radiation element is first analyzed using the method of moments. It is found that a CP wave bandwidth for a 3 dB ax...

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Vydáno v:International journal of antennas and propagation Ročník 2020; číslo 2020; s. 1 - 6
Hlavní autoři: Hirose, Kazuhide, Nakano, Hisamatsu, Nakatsu, Motoshi
Médium: Journal Article
Jazyk:angličtina
Vydáno: Cairo, Egypt Hindawi Publishing Corporation 2020
Hindawi
John Wiley & Sons, Inc
Wiley
Témata:
Antenna design
Antennas
Bandwidths
Broadband
Circular polarization
Method of moments
Transmission lines
Wire
ISSN:1687-5869, 1687-5877
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Popis
Shrnutí:We investigate a circularly polarized (CP) transmission-line antenna composed of loop radiation elements, called a loop-line antenna. To enhance the CP wave bandwidth, an isolated loop radiation element is first analyzed using the method of moments. It is found that a CP wave bandwidth for a 3 dB axial-ratio criterion has a maximum value of 8%. On the basis of the analysis results, we design the loop-line antenna. It is found that the antenna shows a CP wave bandwidth of 6%, which is twice as wide as that of a conventional loop-line antenna. The analysis results are verified with experimental ones. In addition, a condition for wideband CP radiation is discussed and found to be a composite radiation element consisting of two CP loops.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:1687-5869
1687-5877
DOI:10.1155/2020/5216132