This condition is inherent in a continuous wave (CW) radar and in coherent, pulse and Doppler radar; but in the majority of pulse radars the Doppler shift, although present, cannot be measured. The fundamental division in radar types lies between pulse systems (which resolve targets in range) and continuous wave systems (which resolve targets in velocity). Other types, such as pulse Doppler. Receiver used in CW Doppler radar can be direct conversion receiver or quadratuer Doppler receiver. According to the Doppler shift, if the target surface has periodic movement, it is then characterized as phase shift w.r.t to the displacement. Also, if this movement is very small, then at the receiver side, mixer produces an output of low frequency component proportional to the displacement. tory activity with microwave continuous wave (CW) Doppler radar. When considering cardiac and respiration monitoring, the heart and respiration rates are often the first mon-itored parameters. The motivation of this thesis, however, is to measure not only rate-related parameters but also the cardiac and respiratory waveforms, including the chest.