Title :
Electronically steered antenna system for the Australian Mobilesat
Author :
Bialkowski, M.E. ; Jellett, S.T. ; Varnes, R.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queensland Univ., St. Lucia, Qld., Australia
fDate :
8/1/1996 12:00:00 AM
Abstract :
The paper describes an L-band (operating in the frequency ranges of 1545.0-1559.0 MHz (for reception) and 1646.5-1660.5 MHz (for transmission)) land-vehicle mobile satellite-communications system which is designed for the Australian continent. A 14-element cylindrical antenna array for use at the vehicle end of the link is presented. The array uses electronic steering in the azimuth to maintain a communications channel to the satellite. It incorporates novel, low-cost antenna elements which feature increased impedance and ellipticity bandwidth. Also included is a novel configuration of a switched radial divider/combiner which allows for the use of low-cost switching diodes. The indoor and outdoor test results for the subsystems and the entire antenna system are presented
Keywords :
UHF diodes; antenna arrays; antenna testing; electric impedance; land mobile radio; mobile antennas; mobile satellite communication; power combiners; power dividers; satellite antennas; semiconductor switches; 1545 to 1559 MHz; 1646.5 to 1660.5 MHz; Australian Mobilesat; L-band satellite system; UHF; antenna system; communications channel; cylindrical antenna array; electronically steered antenna system; ellipticity bandwidth; impedance bandwidth; indoor test results; land vehicle mobile satellite communications; low cost antenna elements; low-cost switching diodes; outdoor test results; subsystems; switched radial divider/combiner;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings
DOI :
10.1049/ip-map:19960396
