Which statement is true regarding RADAR signal amplification?

The first statement regarding RADAR signal amplification is accurate because the front end of the receiver is specifically designed to handle weak signals received from the antenna. It performs initial amplification, ensuring that the detected RADAR signals are boosted to a suitable level for further processing. This initial amplification is crucial since RADAR signals can be extremely weak when they return from distant targets, and inadequate amplification could lead to loss of important information.

Other statements present challenges: while the mixer does add some gain to the signal, it is not typically specified to provide a consistent gain of at least 6 dB across all operating conditions. Additionally, while the Intermediate Frequency (I.F.) amplifier can be a high-gain amplifier, stating it is always narrow bandwidth can be misleading, as these amplifiers may vary based on the specific design and application requirements. Therefore, the statement about the front end of the receiver providing necessary amplification stands out as the true answer.