Abstract: A microwave motion sensor for detecting multiple levels of motion of a target is disclosed. The motion sensor includes a transceiver for broadcasting a signal into a predetermined area and receiving a reflected signal with a receiver for producing first and second directional signals. A signal conditioning circuit is provided for amplifying the first and second directional signals and digitizing the directional signals. The signal conditioning circuit includes a micro motion amplifier for separately amplifying one of the directional signals and producing a micro motion signal. A processor is provided for receiving the first and second directional signals transmitted by the signal conditioning circuit, and for receiving the micro motion signal. The processor includes a circuit for analyzing the directional signals, and a circuit for comparing the micro motion signal to a threshold.

Abstract: A frequency modulated continuous wave altimeter and method of detecting the presence of an object in a predetermined area. The altimeter is generally comprised of an antenna for receiving and radiating microwave energy, a transmitter for generating frequency modulated microwave energy, a mixer for generating a sinusoidal resulting signal from the communication of transmitted and reflected microwave energy, and a receiver for processing the resulting signal and generating an output signal indicative of distance. The transmitter includes a Gunn diode for generating a carrier signal, modulating means for varying the frequency of the carrier signal, and a high frequency oscillator for impressing a tone on the modulating means.