DEVELOPMENT OF A LOW-COST 35 GHZ RADAR SENSOR

Two different 35 GHz low-cost RF front-end Doppler units suited for au tomotive applications have been constructed The homodyne unit consists of both receiving and transmitting corporate-fed microstrip patch arr ay antennas, a microstrip directional coupler a monolithic GaAs FECTED oscillator and art integrated single Schottky diode mixer The autodyn e configuration uses only one antenna and the FECTED as a self-oscilla ting mixer Inexpensive microstrip technology has been used which yield s a good compromise between cost factor anal technical performance.