What intermediate frequencies are usually used in radar receivers?

The intermediate frequencies typically used in radar receivers are around 30 MHz or 60 MHz. This frequency range is significant as it allows for effective filtering and amplification of the radar signals while minimizing the effects of noise and interference.

Choosing intermediate frequencies in this range is advantageous because they provide a good balance between sensitivity and selectivity. They are high enough to allow for precise filtering of the signals, which is crucial for distinguishing the radar returns from background noise.

Moreover, this frequency range has been traditionally established in radar technology, making it compatible with various radar systems and components designed to operate at these frequencies. This standardization helps in ensuring that radar systems are reliable and display consistent performance across different applications.

In contrast, while other options present different frequencies, they may not align as closely with the established norms for radar applications, which emphasizes the relevance of 30 MHz or 60 MHz frequencies in radar technology.