Maximum range is directly related to which factor?

Maximum range is directly related to which factor?

• A. the transmitted power
• B. Antenna gain
• C. Receiver noise figure
• D. Operating frequency

Answer: (A)

The main factor that sets how far a radar can detect a target is the energy you put into the air with each pulse—the transmitted power. More transmit power means stronger reflections return to the receiver, boosting the signal you can detect at greater distances. In the radar range equation, range increases with transmitted power, though the relationship is to the fourth root, not linear: doubling the transmit power increases the detectable range by about 19%. Antenna gain also helps by boosting both the outgoing and incoming signals, but the direct lever for extending maximum range is the transmitted power. The receiver’s noise figure and the operating frequency affect sensitivity and how reflections behave, but they don’t push the range as directly as increasing transmit power.

The main factor that sets how far a radar can detect a target is the energy you put into the air with each pulse—the transmitted power. More transmit power means stronger reflections return to the receiver, boosting the signal you can detect at greater distances. In the radar range equation, range increases with transmitted power, though the relationship is to the fourth root, not linear: doubling the transmit power increases the detectable range by about 19%. Antenna gain also helps by boosting both the outgoing and incoming signals, but the direct lever for extending maximum range is the transmitted power. The receiver’s noise figure and the operating frequency affect sensitivity and how reflections behave, but they don’t push the range as directly as increasing transmit power.