How does the duplexer switch modes during operation?

The duplexer is a critical component in radar systems that allows the radar to both transmit and receive signals effectively without interference. It operates by using a timing mechanism to switch between transmission and reception modes. During transmission, the duplexer connects the transmitter to the antenna, allowing radar waves to be sent out. Once the transmission is complete, the duplexer switches to connect the antenna to the receiver, enabling it to listen for any echoes or returned signals that may have bounced back from objects in the radar's path.

This timing is crucial because radar systems need to ensure that the receiver is not active while the transmitter is sending out signals; otherwise, the strong outgoing signal could drown out the weaker returning echoes. Thus, the duplexer's functioning is highly dependent on the precise timing of these two operations. The ability to switch modes based on this timing allows the radar to efficiently gather data about its targets without interference.

In contrast, factors such as signal strength, operator intervention, or the direction of incoming radiation are not primary mechanisms for mode switching in typical radar operations.