Difference between cw radar and fmcw radar

Radar and Inverse Scattering The CW radar can measure the Doppler frequency of the target, but it cannot measure the target range. The frequency-modulated CW radar (FM–CW) can measure both the range and Doppler frequency of the target.

1. What is FMCW radar?
2. What is CW radar used for?
3. How FMCW radar overcomes the shortcomings of Doppler CW radar?
4. What is the range of FMCW radar?

What is FMCW radar?

Frequency Modulated Continuous Wave (FMCW) radar is a form of radar where the frequency of the transmitted signal is continuously varied at a known rate over a defined time period. The reflected frequency signal is received by the radar and compared.

What is CW radar used for?

CW radar systems are used in military applications where the measuring the range rate is desired. Of course, range rate can be determined from the basic pulsed radar system by measuring the change in the detected range from pulse to pulse.

How FMCW radar overcomes the shortcomings of Doppler CW radar?

CW radar or doppler radar does not measure range or distance of the target. This limitation of CW radar is overcome by FMCW radar. FMCW radar detects, measures range and radial velocity of the object.

What is the range of FMCW radar?

Frequency Modulation is used in FMCW radar. FMCW radars use mm wave electromagnetic spectrum which has very short wavelengths upto 4 mm [9], [10]. The frequency used is in range of 76–81 GHz. Higher frequencies are used so that even smaller objects can be detected effectively.