Multiple grid amplifier using bremsstrahlung

Claim 1

APPARATUS COMPRISING IN LONGITUDINAL SUCCESSION: A SOURCE OF ELECTRONS; A PLURALITY OF PARALLEL PLANAR GRIDS; AND AN ELECTRON COLLECTOR; AN ACCELERATING ELECTRODE DISPOSED BETWEEN SAID SOURCE AND SAID GRIDS FOR PROJECTING SAID ELECTRONS THROUGH SAID GRIDS IN A DIRECTION SUBSTANTIALLY PERPENDICULAR THERETO MEANS FOR BIASING SAID ELECTRODE TO A GIVEN POTENTIAL WITH RESPECT TO SAID SOURCE; MEANS FOR ESTABLISHING A HOMOGENOUS CONSTANT ELECTRIC FIELD BETWEEN ADJACENT GRIDS WITHIN THE REGION TRAVERSED BY SAID ELECTRONS POLARIZED IN A DIRECTION PARALLEL TO SAID DIRECTION OF PROJECTION COMPRISING; FIRST MEANS FOR BIASING THE FIRST GRID ADJACENT TO SAID ELECTRODE AND SUCCESSIVE ODD NUMBERED GRIDS AT THE SAME POTENTIAL AS SAID ELECTRODE; SECOND MEANS FOR BIASING THE EVEN NUMBERED GRIDS NEGATIVELY WITH RESPECT TO SAID ELECTRODE; A RESONANT STRUCTURE FOR SUPPORTING A HIGH FREQUENCY STANDING WAVE HAVING ELECTRIC FIELD COMPONENTS EXTENDING ALONG DIRECTION OF ELECTRON FLOW OVER A REGION COEXTENSIVE WITH SAID GRIDS; AND MEANS FOR COUPLING HIGH FREQUENCY WAVE ENERGY OUT OF SAID REGION.