DocumentCode
1062411
Title
An Adaptive Multiple Beam System Concept
Author
Egami, Shunichiro ; Kawai, Makoto
Author_Institution
Mitsubishi Elecric Corp., Kamimachiya, Japan
Volume
5
Issue
4
fYear
1987
fDate
5/1/1987 12:00:00 AM
Firstpage
630
Lastpage
636
Abstract
An adaptive multiple beam system, which has flexibility to adapt beam power to varying beam traffic, is proposed. The multiple beam transmitter, which is called "hybrid transponder" in this paper, consists of a pair of multiport hybrids and a set of amplifying elements. Power combining, isolation, and intermodulation characteristics of this multiport network are analyzed. Also, a new interbeam exchange and feeder link connection concept, which serves as the basis for an adaptive multiple beam system, is proposed. Finally, characteristics of an experimental 8-amplifier 8-port hybrid transponder are described.
Keywords
Adaptive arrays; Hybrid junctions; Multibeam antennas; Multiport circuits; Satellite communication, onboard systems; Adaptive systems; Artificial satellites; Broadband amplifiers; Butler matrix; Phase shifters; Satellite antennas; Satellite communication; Telecommunication traffic; Transmitters; Transponders;
fLanguage
English
Journal_Title
Selected Areas in Communications, IEEE Journal on
Publisher
ieee
ISSN
0733-8716
Type
jour
DOI
10.1109/JSAC.1987.1146577
Filename
1146577
Link To Document