Double tank diode parametric amplifier

Claim 1

A PARAMETRIC AMPLIFIER COMPRISING A PAIR OF CLOSED METAL CAVITIES ARRANGED END TO END AND SEPARATED BY A CONDUCTIVE SHIELD HAVING AN OPENING THERETHROUGH, ONE CAVITY BEING RESONANT TO AN IDLER FREQUENCY, THE OTHER BEING RESONANT TO A SIGNAL FREQUENCY, A JUNCTION DIODE LOCATED THROUGH THE OPENING OF SAID SHIELD AND INSULATED THEREFROM, SAID DIODE HAVING ONE TERMINAL WITHIN ONE CAVITY AND AN OPPOSITE TERMINAL WITHIN THE OTHER CAVITY, MEANS COUPLING THE IDLER CAVITY TO AN IDLER LOAD, MEANS COUPLING THE SIGNAL CAVITY TO A SIGNAL INPUT AND A SIGNAL OUTPUT, CONDUCTIVE MEANS EXTENDING COAXIALLY OF SAID SIGNAL CAVITY FOR SUPPORTING SAID DIODE AND CONNECTING ONE TERMINAL THEREOF TO THE HIGH IMPEDANCE POINT OF THE SIGNAL CAVITY, TUBULAR CONDUCTIVE MEANS EXTENDING COAXIALLY OF SAID IDLER CAVITY AND SPACED FROM SAID SHIELD AND GROUNDED ON SAID IDLER CAVITY AT ITS HIGH IMPEDANCE POINT, MEANS FOR APPLYING A REVERSE BIAS TO AND FOR PUMPING SAID DIODE AT A FREQUENCY EQUAL TO THE SUM OF THE IDLER AND SIGNAL FREQUENCIES, AND A COAXIAL LINE EXTENDING THROUGH SAID TUBULAR CONDUCTIVE MEANS AND INSULATED THEREFROM CONNECTING THE BIASING AND PUMPING MEANS WITH THE THE DIODE, SAID COAXIAL LINE HAVING ITS INNER CONDUCTOR CONNECTED CONDUCTIVELY TO THE OPPOSITE TERMINAL OF SAID DIODE AND ITS SHIELD GROUNDED ON SAID IDLER CAVITY AT THE HIGH IMPEDANCE POINT THEREOF, AND MEANS TO COUPLE THE IDLER ENERGY OUT OF THE IDLER TANK AND DISSIPATE IT TO A RECEIVING LOAD MEANS.