Impedance matching for curl and truncated spiral antennas above the ground plane

Curl and truncated spiral antennas are studied for input impedance matching a coaxial line. Each antenna is located at quarter wavelengths above the ground plane and analyzed using the moment method. It is found that the curl antenna shows a voltage standing wave ratio (VSWR) of less than two in a 3...

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Bibliographic Details
Published in:Journal of engineering (Stevenage, England) Vol. 2023; no. 3
Main Authors: Hirose, Kazuhide, Ito, Naonoshin, Nakano, Hisamatsu
Format: Journal Article
Language:English
Japanese
Published: London Institution of Engineering and Technology (IET) 01.03.2023
John Wiley & Sons, Inc
Subjects:
antenna feeds
Antennas
Bandwidths
Ground plane
Impedance matching
Input impedance
Radiation
Spiral antennas
Voltage standing wave ratios
ISSN:2051-3305, 2051-3305
Online Access:Get full text
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Summary:Curl and truncated spiral antennas are studied for input impedance matching a coaxial line. Each antenna is located at quarter wavelengths above the ground plane and analyzed using the moment method. It is found that the curl antenna shows a voltage standing wave ratio (VSWR) of less than two in a 3‐dB axial ratio bandwidth of 30% using a crank feedline with an unbalanced feed. It is also found that the spiral antenna has an axial ratio bandwidth of 24%, where the VSWR remains less than two using parallel feedlines with a quasi‐balanced feed. Curl and truncated spiral antennas are studied for input impedance matching a coaxial line. Each antenna is located at quarter wavelengths above the ground plane and analyzed using the moment method.
Bibliography:SourceType-Scholarly Journals-1
ObjectType-Correspondence-1
content type line 14
ISSN:2051-3305
2051-3305
DOI:10.1049/tje2.12254