Discussion
Duplexer in RADAR system is :
Answer: B
The duplexer in a RADAR system is a microwave switch.
A radar using one antenna for both transmitting and receiving needs a duplexer to connect the antenna to the transmitter during the high-power pulse and to the receiver during the listening time between pulses, while protecting the sensitive receiver from the transmitted pulse. It does this with switching devices such as TR (transmit-receive) and ATR tubes, ferrite circulators or PIN diode switches.
It generates no signal, as an oscillator would, does not amplify, and is not an active filter.
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