DocumentCode
776218
Title
Radiation from a short helical antenna backed by a cavity
Author
Nakano, H. ; Mimaki, H.
Author_Institution
Coll. of Eng., Hosei Univ., Tokyo, Japan
Volume
31
Issue
8
fYear
1995
fDate
4/13/1995 12:00:00 AM
Firstpage
602
Lastpage
604
Abstract
The radiation from a short (1.5 turns) helical antenna backed by a cavity is evaluated on the basis of the numerically determined current distribution. Effects on the radiation field of the angle ψ between the cavity wall and the bottom plane of the cavity are discussed. It is found that the angle coverage of the circularly polarised wave can be widened by increasing ψ. The radiation field for ψ=75° is circularly polarised (an axial ratio within 3 dB) over a hemisphere
Keywords
antenna radiation patterns; antenna theory; current distribution; electromagnetic wave polarisation; helical antennas; microwave antennas; circularly polarised wave; current distribution; radiation field; short helical antenna;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19950440
Filename
383980
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