A High Power Solid State T-R Switch

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  • Author: Gerald Hiller and Rick Cory

Radio transceiver designers are always faced with a dilemma: how to direct the high power transmit signal to the antenna, prevent that signal from entering the sensitive front end of the local receiver, while also allowing a low-loss connection between the antenna and the receiver. The manner in which this problem is solved depends somewhat on the architecture of the system. If the radio and receiver operate on different frequencies, then a filter network known as a diplexer can be placed between the antenna, transmitter output and receiver input. The filters in the diplexer separate and direct the transmit and receive signals to their desired destinations while preventing them from arriving where they do not belong.

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