A 'VENETIAN BLIND' POLARIZATION GRID REFLECTOR LENS FOR DUAL-BEAM 95-GHZ AIRBORNE RADAR MEASUREMENTS

摘要

A novel, low-profile, Venetian blind" polarization grid reflector lens was designed, constructed and successfully tested with a 95 GHz airborne radar system. The lens split the beam of a single aperture radar, to collect dual-beam radar reflectivity and Doppler velocity data in ice clouds from an aircraft. The benefit of a "Venetian blind" lens over a conventional polarization grid reflector or two antennas is its relatively compact, 10x30x40 cm, size. However, the two-way loss of the lens reduced radar sensitivity by 5 and 8 dB in the side-aft and side beams respectively and the aircraft flight speed induced Doppler shift was needed to increase isolation between the side and side-aft beams to above 20 dB.