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What device is used to prevent power from the transmitter from going to the receiver side?

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What device is used to prevent power from the transmitter from going to the receiver side?

(a) Multiplexer

(b) Duplexer

(c) Monoplexer

(d) Filter

This question was addressed to me in semester exam.

This is a very interesting question from Radio Transmitters in section Radio Transmitters, Communication Receivers, Multiplexing and Demultiplexing of Avionics

1 Answer

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Correct option is (b) Duplexer

The explanation is: A duplexer is a device that is placed just before the antenna in a transducer system. It is basically a switch which allows both transmission and reception but only one at a time.

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