High frequency electron discharge devices of the klystron type incorporating below cut-off waveguide leaky wall h-field tuners

Claim 1

A HIGH FREQUENCY ELECTRON DISCHARGE DEVICE OF THE KLYSTRON TYPE HAVING A MAIN BODY PORTION DEFINING AN EVACUATED ENVELOPE INCLUDING AN ELECTRON GUN MEANS HAVING A CATHODE FOR GENERATING AN ELECTRON BEAM DISPOSED AT THE UPSTREAM END PORTION AND INTERNALLY OF THE VACUUM ENVELOPE OF SAID DEVICE, A RESONANT CAVITY DISPOSED DOWNSTREAM FROM SAID CATHODE MEANS AND PROVIDED WITH A PAIR OF AXIALLY SPACED BEAM COUPLING APERTURES THROUGH WHICH SAID ELECTRON BEAM TRAVELS IN OPERATION, SAID RESONANT CAVITY BEING PROVIDED WITH AN APERTURE IN A SIDE WALL THEREIN, SAID APERTURE HAVING AN ELECTROMAGNETIC WAVE PERMEABLE DIELECTRIC WINDOW VACUUM SEALED THEREACROSS, A WAVEGUIDE HAVING A DOMINANT MODE CUT-OFF FREQUENCY WHICH IS ABOVE THE OPERATING FREQUENCY OF THE KLYSTRON OVER THE TUNABLE BAND OF THE FUNDAMENTAL MODE OF THE RESONANT CAVITY DISPOSED ABOUT SAID DIELECTRIC WINDOW EXTERNALLY OF SAID EVACUATED RESONANT CAVITY, SAID BELOW CUT-OFF WAVEGUIDE HAVING A TUNING MEMBER DISPOSED THEREIN WHICH FUNCTIONS TO CONTROL THE RESONANT FREQUENCY OF CAVITY AS A FUNCTION OF TUNING MEMBER POSITION WITHIN SAID WAVEGUIDE.