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US 5,537,002 AGranted
Frequency tunable magnetron including at least one movable backwall
AssigneeOlin Corporation
InventorsDavid Price, Jerrold S. Levine
Life of this patent
Estimating the term…
Abstract
There is provided a tunable high power magnetron. An annular anode circumscribes a cathode and contains a plurality of resonating cavities. The volume of the resonating cavities determines the output frequency of the RF energy emitted by the magnetron. The volume of the cavities is varied by changing the position of movable, electrically conductive back walls.
Claims16
A frequency tunable magnetron, comprising:
- an annular anode containing a plurality of inwardly extending fingers defining first and second alternating sets of interleaved cavities therebetween;
- each of said first set of cavities having respective ones of said fingers defining two generally parallel sidewalls and corresponding electrically conductive backwalls that are generally perpendicular to said parallel sidewalls and are separated from said sidewalls by a respective gap having a size effective to permit unimpeded movement of said backwalls without perturbing the RF boundary condition, wherein all of said backwalls are movable together toward and from a cathode;
- and
- each one of said second set of cavities having respective non-parallel sidewalls and corresponding fixed arcuate backwalls;
- and
- said cathode being coaxial with and surrounded by said anode.
3 more elements
A frequency tunable magnetron, comprising:
- an annular anode containing a plurality of inwardly extending fingers defining first and second alternating sets of interleaved cavities therebetween;
- a cathode, coaxial with and surrounded by the anode;
- a separate electrically conductive backwall of each first cavity defining, in combination with said respective fingers thereof, said first set of cavities, each of said first cavities having respective ones of said fingers defining two generally parallel sidewalls and said corresponding backwall being generally perpendicular to said parallel sidewalls, with each said backwall being independently moveable both toward and from said cathode;
- at least one end cap perpendicular to both said sidewalls and said backwall;
- and
- a respective electrical interconnection between said anode and each said backwall.
3 more elements
A frequency tunable magnetron, comprising:
- an annular anode containing a plurality of inwardly extending fingers defining first and second alternating sets of interleaved cavities therebetween;
- each of said first set of cavities having respective ones of said fingers defining two generally parallel sidewalls and corresponding electrically conductive backwalls that are generally perpendicular to said parallel sidewalls and are separated from said sidewalls by a respective gap having a size effective to permit unimpeded movement of said backwall without perturbing the RF boundary condition, wherein each of said backwalls is independently movable both toward and from a cathode;
- and
- each one of said second set of cavities having respective non-parallel sidewalls and a corresponding fixed arcuate backwall;
- said cathode being coaxial with and surrounded by said anode;
- and
- at least one pick up loop respectively located within one or more cavities of said first and second sets of cavities for extraction of microwaves generated by said frequency tunable magnetron.
4 more elements
A frequency tunable magnetron, comprising:
- an annular anode containing a plurality of inwardly extending fingers defining first and second alternating sets of interleaved cavities therebetween;
- each of said first set of cavities having respective ones of said fingers defining two generally parallel sidewalls and corresponding electrically conductive backwalls that are generally perpendicular to said parallel sidewalls and are separated from said sidewalls by a respective gap having a size effective to permit unimpeded movement of said backwalls without perturbing the RF boundary condition, wherein a series of said backwalls is movable together toward and from a cathode;
- and
- each one of said second set of cavities having respective non-parallel sidewalls and corresponding fixed arcuate backwalls;
- and
- said cathode being coaxial with and surrounded by said anode.
3 more elements
A frequency tunable magnetron, comprising:
- an annular anode containing a plurality of inwardly extending fingers defining cavities therebetween;
- a cathode, rotatable about a major axis that is aligned along said cathode, coaxial with and surrounded by the anode;
- and
- a plurality of pins extending radially outwardly from said cathode toward said fingers.
1 more element
Dependencies are inferred from the claim text.