Patent ID: 6239736
Filing Date: 2001-05-29
Classification: G01S

Abstract:
An FCC certifiable range-gated radar apparatus for detecting an object within a predetermined range of distances: comprising:a pulse generator generating at a repetition frequency ranging from about 50 kHz to about 500 kHz, groups of first and second drive pulses having first and second durations ranging from about 3 nanoseconds to about 20 nanoseconds, and separated by a time period ranging from about 3 nanoseconds to about 100 nanoseconds;an oscillator receiving the groups of first and second drive pulses and generating at a carrier frequency greater than 960 MHZ groups of first and second microwave pulses;an antenna radiating at least the first microwave pulses into an area including the predetermined range of distances and receiving reflected first microwave pulses from the object, the radiated microwave pulses having a signal strength at 3 meters from the antenna that is less than 94 dB.mu.V at frequencies less than 75 MHZ from the carrier frequency and a signal strength less than 54 dB.mu.V at frequencies greater than 75 MHZ from the carrier frequency; anda homodyne detector mixing at least the second microwave pulses and the reflected first microwave pulses to produce a baseband signal indicative of at least one of a presence and a movement of the object.