DocumentCode
1372568
Title
Backfire radiation from a monofilar helix with a small ground plane
Author
Nakano, Hisamatsu ; Yamauchi, Junji ; Mimaki, Hiroaki
Author_Institution
Coll. of Eng., Hosei Univ., Tokyo, Japan
Volume
36
Issue
10
fYear
1988
fDate
10/1/1988 12:00:00 AM
Firstpage
1359
Lastpage
1364
Abstract
Numerical analysis of a helical antenna is made in the presence of a finite-grid ground plane. It is found that the transition from forward-fire radiation to backfire radiation occurs as the ground-plane diameter is reduced to the order of the helix diameter. The investigation of the backfire helix with a small ground plane shows that a circularly polarized wave is radiated over a frequency range of more than 1 to 1.3. An application of the backfire helix to primary feed for a paraboloidal reflector is also described, in which the far-field pattern is evaluated by the physical-optics approximation
Keywords
antenna feeders; antenna radiation patterns; antennas; backfire radiation; far-field pattern; finite-grid ground plane; forward-fire radiation; helical antenna; monofilar helix; physical-optics; primary feed; Current distribution; Feeds; Frequency; Helical antennas; Numerical analysis; Optical polarization; Physical optics; Polarization; Reflector antennas; Satellite broadcasting; Wire;
fLanguage
English
Journal_Title
Antennas and Propagation, IEEE Transactions on
Publisher
ieee
ISSN
0018-926X
Type
jour
DOI
10.1109/8.8621
Filename
8621
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