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US 5,736,820 AGranted
Cavity arrangements
AssigneeEEV Limited
InventorSteven Bardell
Life of this patent
Estimating the term…
Abstract
In an output resonant cavity used with a linear electron beam tube such as an IOT, magnetic material is mounted on walls of the cavity and defines annular channels within which coils are located to provide focusing of an electron beam travelling along the axis of a tube located in apertures in the cavity walls. An inner rim locates the electron beam tube with respect to the cavity.
Claims16
A cavity arrangement for use with a linear electron beam tube having a vacuum envelope comprising:
- a resonant cavity having first and second portions, said resonant cavity being defined by first and second walls each having an outer surface, said walls having apertures therein through which in use said tube extends, the first portion of said resonant cavity being located outside the vacuum envelope of said linear electron beam tube and the second portion of said resonant cavity being located within said vacuum envelope;
- and
- magnetic focusing means mounted on the first portion of said resonant cavity, said magnetic focusing means including a member made of magnetic material mounted on the outer surface of at least one of said first and second walls, said magnetic focusing means being outside the vacuum envelope of said linear electron beam tube.
A linear electron beam tube assembly comprising:
- a resonant cavity having first and second portions, said resonant cavity being defined by first and second walls each having an outer surface, said walls having apertures therein;
- magnetic focusing means mounted on the first portion of said resonant cavity, said magnetic focusing means including a member made of magnetic material mounted on the outer surface of at least one of said first and second walls;
- and
- a linear electron beam tube having a vacuum envelope, said vacuum envelope extending through the apertures in said first and second walls into the second portion of said resonant cavity, the first portion of said resonant cavity and said magnetic focusing means being outside the vacuum envelope of said linear electron beam tube.
1 more element
Dependencies are inferred from the claim text.