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US 5,182,493 AGranted
Rising sun magnetron with planar tuning member protruding into only one set of cavities
AssigneeEEV Limited
InventorMark A. Robertson
Life of this patent
Estimating the term…
Abstract
A magnetron having a rising sun anode includes a slot which is extensive in a plane transverse to the axis and in which a tuning member is located. The tuning member may be moved inwardly and outwardly to control the frequency of the magnetron output radiation, the member being arranged such that it can intercept the anode cavities by a variable amount to change their resonant characteristics.
Claims15
A magnetron for generating radiation at a predetermined frequency comprising:
- a cathode having a longitudinal axis;
- a cylindrical anode coaxially surrounding said cathode, said anode having
- first and second ends disposed along said longitudinal axis;
- first and second sets of anode cavities disposed radially within said cylindrical anode and distributed circumferentially about said longitudinal axis between the first and second ends of said anode, each cavity of said second set of anode cavities being interposed between adjacent cavities of said first set and having a length in the radial direction which is shorter than respective lengths associated with the adjacent cavities of said first set;
- and
- a tuning slot disposed in the anode, said tuning slot extending in a plane substantially orthogonal to said longitudinal axis;
- and
- a tuning member comprised of a dielectric material movable within said tuning slot so as to protrude into at least two cavities of said first set of cavities and which does not protrude into any cavity of said second set of cavities, said tuning member protruding into said tuning slot by an amount which results in radiation being generated by said magnetron at said predetermined frequency.
5 more elements
A magnetron for generating radiation at a predetermined frequency comprising:
- a cathode having a longitudinal axis;
- a cylindrical anode coaxially surrounding said cathode, said anode having
- first and second sets of anode cavities disposed radially within said cylindrical anode and distributed circumferentially abut said longitudinal axis, each cavity of said second set of anode cavities being interposed between adjacent cavities of said first set and having a length in the radial direction which is shorter than respective lengths associated with the adjacent cavities of said first set;
- and
- a plurality of tuning slots disposed in the anode, each of said plurality of tuning slots extending in a corresponding plane which is substantially orthogonal to said longitudinal axis;
- and
- a plurality of tuning members, each of said tuning members being movable within a corresponding one of said tuning slots so as to protrude into at least one cavity of only said first set of cavities, each of said tuning members protruding into the corresponding tuning slot by an amount which results in radiation being generated by said magnetron at said predetermined frequency.
4 more elements
Dependencies are inferred from the claim text.