Half duplex RF transceiver having low transmit path signal loss

Details Half duplex RF transceiver having low transmit path signal loss Half duplex RF transceiver having low transmit path signal loss

1995-05-04

1997-12-23

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455117, 455272, 333 11, H04B 144

Patent

active

057015953

ABSTRACT:
A circulator section in a transceiver receives a transmit signal and an antenna signal and provides them respectively to an antenna and to an electronic switch. The electronic switch operates synchronously with the duplex mode of the transceiver to connect the antenna to a receiver when the transceiver is in receive mode, and to a matched load when it is in transmit mode. Since the signal path of any portion of the transmit signal reflected by a mismatched antenna is terminated by the load, power which otherwise might be reflected back to the transmitter and thereby damage it is instead absorbed by the matching load.

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patent: 5453154 (1995-09-01), Thomas et al.
patent: 5477532 (1995-12-01), Hoshigami et al.

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