Title :
A hybrid scanned conformal planar array for mobile satellite communications
Author :
Francian, R.S. ; Chung, H.H. ; Peng, S.Y.
Author_Institution :
Teledyne Ryan Electron., San Diego, CA, USA
Abstract :
A conformal array has been developed for the ground segment of a mobile satellite communications system. The array utilizes a unique combination of block phasing and electronic beam steering, in addition to mechanical rotation, to achieve the required gain and intersatellite isolation performance while maximizing circuit simplicity and minimizing cost. The array consists of 32 printed crossed slot elements and is 27 in. in diameter. The beam-forming networks (BFN) provides two elevation beam positions for grain coverage and two azimuth positions for a sequential lobing tracking scheme. Grain over the coverage area is greater than 12 dBic, and intersatellite isolation is >or=23.8 dB at any point in the CONUS. The specified multipath rejection capability is also met.<>
Keywords :
microwave antenna arrays; satellite antennas; satellite ground stations; BFN; CONUS; antenna array; azimuth positions; beam-forming networks; block phasing; electronic beam steering; elevation beam positions; hybrid scanned conformal planar array; intersatellite isolation performance; mobile satellite communications system; multipath rejection capability; printed crossed slot elements; sequential lobing tracking scheme; Azimuth; Costs; Diffraction; Frequency; Laboratories; Phase shifters; Phased arrays; Planar arrays; Propulsion; Satellite communication;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1989. AP-S. Digest
Conference_Location :
San Jose, CA, USA
DOI :
10.1109/APS.1989.135075
