A New Observation in Spiral and Curl Antenna Configurations above the Ground Plane

We report here that spiral and curl antennas are essentially the same when using the moment method. This aids in the understanding and design of the two antennas, and serves as the groundwork for new ideas regarding antennas. First, the spiral antenna height above the ground plane was gradually redu...

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Bibliographic Details
Published in:Applied Sciences Vol. 12; no. 9; p. 4272
Main Authors: Hirose, Kazuhide, Hirukawa, Masayuki, Nakano, Hisamatsu
Format: Journal Article
Language:English
Published: Basel MDPI AG 23.04.2022
Subjects:
Antennas
Bandwidths
Biology (General)
Chemistry
circularly polarized antenna
curl antenna
Engineering (General). Civil engineering (General)
low-profile antenna
Physics
QC1-999
QD1-999
QH301-705.5
Radiation
spiral antenna
spiral antenna; curl antenna; low-profile antenna; circularly polarized antenna
T
TA1-2040
Technology
Wire
ISSN:2076-3417, 2076-3417
Online Access:Get full text
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Summary:We report here that spiral and curl antennas are essentially the same when using the moment method. This aids in the understanding and design of the two antennas, and serves as the groundwork for new ideas regarding antennas. First, the spiral antenna height above the ground plane was gradually reduced, and at each height, the spiral configuration parameters were optimized for an axial ratio of less than 0.1 dB. It was found that the spiral antenna had configuration parameters almost the same as those for a curl antenna at a height of 0.15 wavelengths. Next, the curl antenna was analyzed with a reduced height. The antenna, at a height of 0.10 wavelengths, showed a 3 dB axial ratio bandwidth of 3%, with a VSWR of less than two. The analysis results are verified with experimental results.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:2076-3417
2076-3417
DOI:10.3390/app12094272