Dual‐curl antennas for broadband circular polarisation

Autor: K. Hirose, M. Nakatsu, H. Nakano
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Electronics Letters, Vol 57, Iss 14, Pp 542-544 (2021)
Druh dokumentu: article
ISSN: 1350-911X
0013-5194
DOI: 10.1049/ell2.12191
Popis: Abstract A novel dual‐wire antenna to obtain wideband circular polarisation is proposed. The antenna consists of curl elements with a balanced feed above a ground plane. Using the moment method, an antenna with balanced feedlines having two sources is analysed first. Analysis reveals that the antenna shows a 3 dB axial‐ratio bandwidth of 36%. Next, an antenna with quasi‐balanced feedlines having one source to simplify the feed system is investigated. It is found both numerically and experimentally that the axial‐ratio bandwidth remains unchanged, and a VSWR of less than two is obtained.
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