What does a duplexer do in radar systems?

In radar systems, the duplexer serves a critical function by preventing high power radiation from reaching the receiver. During radar operation, the system alternates between transmitting signals and receiving echoes from objects in the environment. The duplexer's role is to ensure that while the radar is transmitting high-energy signals to detect objects, these powerful signals do not interfere with or damage the sensitive receiving equipment. Essentially, the duplexer acts as a switch that isolates the transmitter and receiver so they can operate without interference, thus maintaining the integrity of the radar data being collected. This functionality allows for effective signal handling and contributes to the overall performance and reliability of radar systems.

Understanding the duplexer's role is vital for comprehending radar operation. This option is indeed the most accurate representation of the duplexer's purpose within radar technology.