Patent ID: 8264401

Claim:
An apparatus, comprising: a micro-radar adapted to generate an antenna output of less than or equal to 10 milli-Watt (mW) through an antenna to an object and receive a Radio Frequency (RF) reflection off of said object, and adapted to respond to a first Digital to Analog Converter (DAC) output and a second DAC output, comprising: a timing generator adapted to generate a transmit signal with a first edge in response to said first DAC output and a system clock; and said timing generator adapted to generate a reception signal with a second edge in response to said second DAC and said system clock, where said second edge has a delay from said first edge that sweeps through a short delay to a long delay over a time interval; said micro-radar generates a transmit RF burst in response to said first edge of said transmit signal for delivery to said antenna to generate said antenna output in response to said transmit pulse; said micro-radar mixes a received RF reflection of said RF reflection and said transmit RF burst, in response to said second edge of said reception signal, to generate an Intermediate Frequency (IF) signal with a peak amplitude at a sweep delay Tm for a distance T 0 of said object from said antenna; and a frequency of said IF signal is one over a compression ratio multiplied by a carrier frequency of said antenna output, where said compression ratio is about one million.