Back to results
US 4,851,788 AGranted
Mode suppressors for whispering gallery gyrotron
AssigneeVarian Associates, Inc.
InventorsRobert L. Ives, Howard R. Jory, Joseph Feinstein
Life of this patent
Estimating the term…
Abstract
A gyrotron interaction resonator 29 operating in a TE.sub.n1 cavity mode has an array of longitudinal slots 32 in the conductive wall 30. The slots 32 are spaced to couple to the unwanted TE.sub.n1 modes and to other modes of differing n and not to the desired mode. Wave-absorptive material 34 spaced from the inner cavity wall 28 and coupled to slots 32 absorbs the unwanted modes.
Claims10
An electron tube for generating electromagnetic wave energy comprising:
- means for generating a stream of electrons progressing in a longitudinal direction;
- means for generating a steady magnetic field having a component in said longitudinal direction for directing said stream;
- an electromagnetic resonator comprising a conductive wall surrounding said stream, said resonator adapted to support an electromagnetic wave in energy-exchanging relation with said stream, said wave being in a desired mode having electric field lines transverse to said longitudinal direction and terminating on the inner surfaces of said resonator, with periodic reversals of said electric field lines around said wall;
- an array of slots in said wall elongated in said longitudinal direction, said slots being periodically spaced in the direction perpendicular to said longitudinal direction at positions where currents of said mode in said inner surface of said wall are minimum and;
- lossy material spaced from said inner surface of said wall in the direction from said stream in energy-absorbing relation with the fields in said slots.
2 more elements
Dependencies are inferred from the claim text.