Sensing of Human Breathing and Heart Beating at Different Orientation Angles by CW Doppler Radar

Bioradiolocation is an experimentally confirmed method for frequency and amplitude detection of human breathing and heart beating. The aim of this paper is to present the results of the research on dependency of bioradar signal quality on the orientation angle of an examined person. Furthermore, the impact of a distance between radar and an examined person on bioradar signal is discussed. In addition, the subject on necessity of using radar with higher operating frequency to detect breathing patterns and heart rate is touched upon. The results of this research might be useful for the development of monitoring systems for sleep disorders diagnostics and for a remote assessment of mental and emotional human state.