Title :
Extended range coverage of an imaging radar system with feed-mounted 94 GHz MIMIC HEMT low noise amplifier and external ILO
Author :
Bui, L.Q. ; Alon, Y. ; Neilson, D.
Author_Institution :
Lear Astronics Corp., Santa Monica, CA, USA
Abstract :
An airborne forward-looking radar has been developed and built to provide an image of an airport runway for a pilot who is landing his aircraft in zero- or low-visibility fog. The low transmitted power and the high noise figure of a homodyne FMCW front-end limit the range coverage of 94 GHz imaging radars to less than 1000 m. Using a combination of a 2-stage MIMIC, 94 GHz high electron mobility transistor (HEMT) low-noise amplifier and external ILO mounted at the feed locations, the improved imaging radar can produce visible runway images up to 3000 m away. The first FMCW runway images are shown to demonstrate the 94 GHz system resolution.<>
Keywords :
MMIC; aircraft instrumentation; field effect integrated circuits; high electron mobility transistors; microwave amplifiers; microwave imaging; radar systems; 2-stage amplifiers; 3 km; 94 GHz; EHF; FMCW runway images; MIMIC; MM-waves; airborne forward-looking radar; airport runway imaging; external ILO; feed-mounted HEMT LNA MIMIC; fog; high electron mobility transistor; imaging radar system; low noise amplifier; range coverage; system resolution; Airborne radar; Aircraft; Airports; Feeds; HEMTs; Low-noise amplifiers; MODFETs; Noise figure; Optical imaging; Radar imaging;
Conference_Titel :
Microwave Symposium Digest, 1992., IEEE MTT-S International
Conference_Location :
Albuquerque, NM, USA
Print_ISBN :
0-7803-0611-2
DOI :
10.1109/MWSYM.1992.188077
