Advantages :

• Single frequency transmission and hence narrow receiver bandwidth
• Duty cycle is unity, so mean power can be as high as transmitters will permits.
• Ability to see moving targets in presence of large number of echoes from stationary target to which it is blind.
• Target velocity can be measured using Doppler shift.
• Zero minimum range.
• Simple to design and construct.

Disadvantages:

• No timing marks, so unable to measure range.
• Separate antennas are required for receiver and transmitter.
• Cannot detect targets crossing its beam at right angles

Applications:

• Measurement of the relative velocity of a moving target.
• Human Gait Recognition
• In Doppler Radar.