Patent ID: 6317075
Filing Date: 2001-11-13
Classification: G01S,H03D

Abstract:
An FMCW sensor comprising:a fixed frequency generator for generating a carrier frequency and having an output;a second frequency generator for generating variable modulation frequencies and having an output;a mixer for generating mixed signals from said carrier frequency and said modulation frequencies and for reducing said generated mixed signals to a predetermined frequency band, said mixer including a field effect transistor having a gate terminal connected to said output of said fixed frequency generator, a source terminal connected to ground, and a drain terminal connected to said output of said second frequency generator, and including an output, said mixed signals being supplied from said drain terminal to said output;a transmitter and receiver unit having an input connected to said output of said mixer and having an output;a reference unit having an input connected to said output of said second frequency generator and having an output; andan evaluation means having an input connected to said output of said transmitter and receiver unit, an input connected to said output of said reference unit, and an output.