Title :
Alpes: a low profile electronically steered antenna for MobileSat(R) applications
Author :
Ashoka, H. ; de Jager, D. ; Logan, J.
Author_Institution :
MITEC Ltd., Australia
Abstract :
An electronically steered phased array antenna for L-band mobile satellite communications applications using the Optus MobileSat(R) system is described. The antenna uses circularly polarised microstrip radiating elements in a conical arrangement with a profile only 120 mm in height including the radome. A closed loop tracking system based on the received RF signal strength and an open loop tracking system based on a gyroscope for beam steering during shadow conditions are incorporated within the antenna. The antenna has been designed and tested to operate in tough environmental conditions as encountered when mounted on road and track vehicles
Keywords :
antenna phased arrays; antenna radiation patterns; electromagnetic wave polarisation; microstrip antenna arrays; mobile antennas; mobile satellite communication; satellite tracking; 120 mm; Alpes; L-band mobile satellite communications; MobileSat applications; Optus system; beam steering; circularly polarised radiating elements; closed loop tracking system; conical arrangement; electronically steered antenna; gyroscope; low profile antenna; microstrip radiating elements; open loop tracking system; phased array antenna; received RF signal strength; road vehicles; shadow conditions; tough environmental conditions; track vehicles; vehicle mounted antenna; Antenna arrays; L-band; Microstrip antenna arrays; Microstrip antennas; Mobile antennas; Phased arrays; Polarization; Satellite antennas; Satellite communication; Tracking loops;
Conference_Titel :
Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific
Print_ISBN :
962-442-117-X
DOI :
10.1109/APMC.1997.654622
