Title :
An experimental 225 GHz pulsed coherent radar
Author :
McMillan, Robert W. ; Trussell, C. Ward, Jr. ; Bohlander, Ronald A. ; Butterworth, J. Clark ; Forsythe, Ronald E.
Author_Institution :
Georgia Inst. of Technol., Atlanta, GA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
An experimental coherent pulsed radar operating at 225 GHz is described. The system uses a pulsed, phase-locked extended interaction oscillator transmitter and frequency divided by 4 subharmonic mixer pumped by a phase-locked Gunn oscillator as the receiver. A quasi-optical circular polarization duplexer combines transmitter and receiver signals into the same antenna. Results presented include the detection of targets out to ranges of 3.5 km and observations of Doppler spectra of trucks and tracked vehicles which show contributions from both body and tracks
Keywords :
Doppler effect; military systems; radar systems; 225 GHz; 3.5 km; Doppler spectra; EHF; MM-wave system; circular polarization duplexer; extended interaction oscillator transmitter; phase-locked Gunn oscillator; pulsed coherent radar; quasioptical duplexer; receiver; subharmonic mixer; target detection; tracked vehicles; transmitter; trucks; Frequency conversion; Gunn devices; Oscillators; Polarization; Radar antennas; Radar tracking; Receiving antennas; Target tracking; Transmitters; Transmitting antennas;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
