CW (continuous wave) Doppler radar is a type of radar system that uses continuous transmission and reception of radio frequency signals to detect Doppler shift caused by moving objects. Unlike pulse radar, which transmits short pulses of radio waves and then listens for echoes, CW radar emits a continuous wave of radio frequency energy without interruption.
This continuous transmission allows the CW radar to measure the frequency offset between the transmitted signal and the received signal reflected by moving targets.
CW Doppler Radar works based on the principle of the Doppler effect, which causes a wave to change in frequency when the source or observer moves relative to each other. When the CW radar signal reflects off a moving target, the frequency of the received signal is shifted proportionally to the speed of the target relative to the radar.
By measuring this frequency shift, the CW Doppler radar can determine the speed of the target.
An advantage of CW Doppler radar is its ability to measure speed accurately and continuously. Since CW radar operates with continuous transmission, it can detect and track the speed of moving targets in real time. This makes it particularly useful in applications where monitoring the speed of objects, such as vehicles, aircraft or weather systems, is crucial.
CW Doppler radar systems are also relatively simple in design compared to Pulse radar systems, allowing for cost-effective implementations in a variety of applications including traffic monitoring, weather forecasting, and industrial process control
