Broadband parametric amplifier with two independently tunable idler circuits

Claim 1

ELECTROMAGNETIC WAVE APPARATUS COMPRISING, A FIRST SECTION OF WAVEGUIDE ADAPTED TO RECEIVE ELECTROMAGNETIC WAVVES AT A FIRST FREQUENCY AT ONE END AND BEING ADAPTED TO SUPPORT WAVES AT SAID FIRST FREQUENCY AND WAVES AT A SECOND FREQUENCY BUT NOT WAVES AT A THIRD FREQUENCY WHICH IS MUCH LOWER THAN THE FIRST AND SECOND FREQUENCIES, A NON-LINEAR VARIABLE REACTANCE DEVICE POSITIONED WITHIN SAID WAVEGUIDE, SAID REACTANCE DEVICE BEING CHARACTERIZED BY HAVING A SUBSTANTIALLY FIXED COMPONENT OF REACTANCE AND A NON-LINEAR VARIABLE COMPONENT OF REACTANCE AT A GIVEN FREQUENCY, REACTIVE MEANS ASSOCIATED WITH SAID FIRST WAVEGUIDE AND PRESENTING AT SAID NON-LINEAR VARIABLE REACTANCE DEVICE A VALUE OF REACTANCE TO RESONATE AT SAID SECOND FREQUENCY WITH THE FIXED COMPONENT OF REACTANCE OF SAID DEVICE, A SECOND SECTION OF WAVEGUIDE COUPLED TO SAID FIRST SECTION OF WAVEGUIDE AND TO SAID NON-LINEAR VARIABLE REACTANCE DEVICE, SAID SECOND SECTION OF WAVEGUIDE BEING ADAPTED TO RECEIVE ELECTROMAGNETIC WAVES AT SAID THIRD FREQUENCY FOR COUPLING TO SAID NON-LINEAR VARIABLE REACTANCE DEVICE, THIRD AND FOURTH CONCENTRICALLY ARRANGED WAVEGUIDES COUPLED TO SAID FIRST SECTION OF WAVEGUIDE AND TO SAID NON-LINEAR VARIABLE REACTANCE DEVICE, SECOND REACTIVE MEANS ASSOCIATED WITH THE INNER ONE OF SAID CONCENTRIC WAVEGUIDES TO PRESENT AT SAID DEVICE A VALUE OF REACTANCE TO RESONATE AT SAID THIRD FREQUENCY WITH THE FIXED COMPONENT OF REACTANCE OF SAID DEVICE, FILTER MEANS ASSOCIATED WITH SAID SECOND AND SAID INNER CONCENTRICALLY DISPOSED WAVEGUIDES FOR PRESENTING REACTANCES THAT PERMIT THE PASSAGE OF SAID THIRD FREQUENCY WAVES BUT BLOCK SAID FIRST AND SECOND FREQUENCY WAVES,