Transmit-receiver switch utilizing resonant circuits and oppositely poled parallel diodes for isolation

Claim 1

IN COMBINATION WITH A TRANSMITTER AND A RECEIVER HAVING A COMMON CONNECTION, MEANS FOR PREVENTING LOCAL COUPLING OF TRANSMITTED SIGNALS BETWEEN SAID COMMON CONNECTION AND THE INPUT OF SAID RECEIVER COMPRISING A REACTANCE NETWORK COUPLED IN A PATH BETWEEN SAID COMMON CONNECTION AND THE RECEIVER INPUT, SAID NETWORK INCLUDING A CAPACITANCE AND AN INDUCTANCE CONNECTED IN PARALLEL BRANCHES BY A PAIR OF PARALLEL OPPOSITELY POLED UNIDIRECTIONAL CURRENT DEVICES, SAID UNIDIRECTIONAL CURRENT DEVICES BEING CONDUCTING IN RESPONSE TO SAID TRANSMITTED SIGNALS SO THAT SAID CAPACITANCE AND INDUCTANCE FORM A PARALLEL RESONANT CIRCUIT TUNED TO SAID SIGNALS, SAID UNIDIRECTIONAL CURRENT DEVICES BEING NONCONDUCTING IN RESPONSE TO RECEIVED SIGNALS SO THAT SAID REACTANCE NETWORK PROVIDES A HIGH IMPEDANCE CONNECTION FOR SAID TRANSMITTED SIGNALS AND A RELATIVELY LOW IMPEDANCE CONNECTION FOR SAID RECEIVED SIGNALS.