DocumentCode
3378906
Title
Helical array antennas with high efficiency, wide frequency bandwidth and simple structure
Author
Noro, Takanori ; Kazama, Yasuhiro
Author_Institution
Labs, Japan Radio Co. Ltd., Tokyo, Japan
Volume
1
fYear
2004
fDate
20-25 June 2004
Firstpage
1050
Abstract
A good circularly polarized wave over a wide frequency bandwidth can be produced by 2-turn helical antennas. However, when this type of antenna is used as an element of an array antenna, the axial ratio and antenna gain are greatly deteriorated. The paper describes the fabrication and testing of 5 and 14 element helical array antennas with high efficiency, wide frequency band, and simple structure. They are applicable to INMARSAT systems.
Keywords
antenna arrays; antenna radiation patterns; broadband antennas; electromagnetic wave polarisation; helical antennas; satellite antennas; INMARSAT systems; antenna gain; axial ratio; bandwidth; circularly polarized wave; efficiency; helical array antennas; radiation patterns; simple structure; Antenna arrays; Antenna measurements; Bandwidth; Feeds; Frequency; Helical antennas; Linear antenna arrays; Satellite antennas; Satellite broadcasting; Satellite communication;
fLanguage
English
Publisher
ieee
Conference_Titel
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN
0-7803-8302-8
Type
conf
DOI
10.1109/APS.2004.1329854
Filename
1329854
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