What type of modulation is often used in RADAR systems?

Frequency modulation is commonly used in RADAR systems primarily due to its advantageous characteristics that enhance performance in various operational scenarios. In RADAR systems, frequency modulation allows for better discrimination of targets, improved resolution, and greater immunity to noise. The ability to change the frequency of the transmitted signal over time is particularly beneficial in applications such as Doppler RADAR, where the frequency shift caused by moving targets can be precisely measured to determine their velocity.

By utilizing frequency modulation, RADAR systems can also exploit the phenomenon of frequency diversity to reduce the effects of multipath propagation, where signals take multiple paths to reach the receiver. This modulation type ensures that even in cluttered environments, the relevant signals can be distinguished from unwanted noise or interference, thereby enhancing detection capabilities.

Overall, frequency modulation effectively meets the requirements of modern RADAR applications, making it the preferred choice among the available modulation techniques.