UWB radar for detection and positoning of human beings in complex environment has been developed and manufactured. Novelty of the radar lies in its large operational bandwidth (11.7GHz at 10dB level) combined with high time stability. Detection of respiratory movement of a person in laboratory condtions has been demonstrated. Based on experimental results human being radar return has been analused in the frequency band from 1 GHz to 2 GHz. Novel principle of human being detection is condisered and verified experimentally.@en