Ultra-wideband radar motion sensor

(57) A summary movement sensor uses a super-broadband (UWB) radar as a base. The range of a UWB radar is determined by a pulse / echo interval. It operates by starting a sensor (40) in a fixed range for movement detection, and perceiving change of the degree of average radar reflection in the range. A sampling gate (Fig. 4) is opened wide by delay of fixation after radiation of an initial pulse. The sampling gate output obtained by that cause is equalized to a repetition pulse. Change of the equalized sampling gate output expresses change of the degree of radar reflection in a specific range, and by extension, movement.