Title :
A phase scanned AEW radar antenna
Author :
Lagerlof, R. ; Josefsson, L.
Author_Institution :
Ericsson Radar Electron. AB, Molndal, Sweden
Abstract :
A large S-band electronically scanned phased array antenna is described. It consists of two 8-m*0.6-m radiating apertures on each side of a slim boxlike structure housing about 200 air-cooled solid-state T/R (transmit/receive) modules for amplitude and phase control. This unit will be used in a low-cost, high-performance AEW (airborne early warning) radar system carried by a small aircraft. The following minimum antenna performance must be met: scanned region, +or-60 degrees (azimuth on both sides); elevation coverage, <10 degrees ; sidelobe level, below isotropic; gain, 35 dB; beamwidth, 1 degrees (azimuth); and element VSWR (voltage standing-wave ratio), 2:1. Measurements have been made on individual panels and pairs of panels with a fixed corporate feed and also with mechanically adjustable phase shifters and attenuators. The results are in good agreement with those obtained by theoretical analysis.<>
Keywords :
aircraft; antenna phased arrays; microwave antenna arrays; military equipment; mobile antennas; radar antennas; scanning antennas; 35 dB; AEW radar antenna; S-band; VSWR; air cooled T/R modules; airborne early warning; aircraft; amplitude control; antenna performance; attenuators; beamwidth; corporate feed; elevation coverage; gain; measurements; phase control; phase scanned antenna; phase shifters; radar system; sidelobe level; solid state modules; transmit/receive modules; voltage standing-wave ratio; Airborne radar; Aircraft; Antenna arrays; Apertures; Azimuth; Gain; Phase control; Phased arrays; Radar antennas; Solid state circuits;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115318
