Non-reciprocal attenuation equalization network using circulator having plural mismatched ports between input and output port

Claim 1

AN EQUALIZER NETWORK PRODUCING ATTENTUATION OF ELECTRIC WAVE SIGNALS APPLIED THERETHROUGH WITHIN A FREQUENCY BAND HAVING A MID-FREQUENCY FO, SAID NETWORK BEING ADAPTED TO BE INSERTED BETWEEN AN INPUT TRANSMISSION LINE AND AN OUTPUT TRANSMISSION LINE AND COMPRISING A CIRCULATOR HAVING A NUMBER N OF PORTS OF RESPECTIVE RANKS 1 TO N AND SO ARRANGED THAT TRANSMISSION OF SAID SIGNALS BE POSSIBLE ONLY UNIDIRECTIONALLY FROM ANY ONE OF SAID PORTS HAVING A GIVEN RANK TOI THAT OF SAID PORTS HAVING THE TANK IMMEDIATELY HIGHER THAN SAID GIVEN RANK, MEANS FOR CONNECTING SAID INPUT LINE TO THAT OF SAID PORTS HAVING RANK 1, MEANS FOR CONNECTING SAID OUTPUT LINE TO THATOF SID PORTS HAVING RANK M, AND A PLURALITY IN NUMBER (M-2) OF COMPLEX IMPEDANCES EACH HAVING A RESISTIVE PART AND A REACTIVE PART IN SAID FREQUENCY BAND AND RESPECTIVELY CONNECTED TO THE PORTS OF RANKS INTERMEDIATE 1 AND M, EACH OF SAID COMPLEX IMPEDANCES HAVING SUCH A VALUE AS TO MISMATCH THE OUTPUT WAVE IMPEDANCES HAVING SUCH A VALUE AS AT THAT OF LATTER SAID PORTS CONNECTED THERETO AT ANY FREQUENCY WITHIN SAID BAND AND TO AN EXTENT WHICH IS A PREDETERMINED FUNCTION OF LATTER SAID FREQUENCY, AND ALL OF SAID COMPLEX IMPEDANCES BEING PASSIVE INDEPENDENT-OFTIME IMPEDANCES.