Title :
Millimeter-wave imaging using preamplified diode detector
Author :
Lam, Wayne ; Lee, Paul ; Yujiri, Larry ; Berenz, John ; Pearlman, Jay
Author_Institution :
TRW, Redondo Beach, CA, USA
fDate :
7/1/1992 12:00:00 AM
Abstract :
A 2-pixel imaging array was developed to demonstrate millimeter-wave imaging. Each pixel consists of a Q-band Vivaldi antenna and a preamplified diode detector, using InGaAs pseudomorphic HEMT MMIC low-noise amplifiers (LNAs) and a beam-lead Schottky-diode detector. The approach does not require local oscillator (LO) power, is compatible with MMIC technology, and can reduce the complexity and manufacturing cost of millimeter-wave imaging arrays. The preamplified diode detector exhibited 17-V/ mu W responsivity at 44 GHz and -75-dBm tangential sensitivity at 1-MHz video bandwidth. The array demonstrated millimeter-wave imaging of three vehicles in a parking lot.<>
Keywords :
MMIC; Schottky-barrier diodes; image sensors; microwave detectors; microwave imaging; 1 MHz; 44 GHz; EHF; InGaAs; LNAs; MMIC; Q-band; Vivaldi antenna; beam-lead Schottky-diode detector; imaging arrays; low-noise amplifiers; millimeter-wave imaging; preamplified diode detector; pseudomorphic HEMT; Costs; Envelope detectors; Indium gallium arsenide; Local oscillators; Low-noise amplifiers; MMICs; Manufacturing; Millimeter wave technology; PHEMTs; Vivaldi antennas;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
