Tunable magnetron of the coaxial-vacuum type
AssigneeLitton Systems, Inc.
InventorGregory T. Schaeffer
Life of this patent
Estimating the term…
Abstract
A tunable, coaxial-vacuum magnetron is shown having a cathode surrounded by an anode within a surrounding evacuated anode cavity. Located between the cathode-anode interaction space and an output from the anode cavity is a tuning mechanism which includes a single symmetrical ceramic tuning rod that is adjusted along its axis into and out of the anode cavity. The adjustment mechanism includes a tuning nut rotatably mounted in a tuning housing which turns to move a threaded shaft along the axis thereof. Separating the threaded shaft from the anode cavity is a bellows attached to the tuning housing and to which is attached the symmetrical tuning rod for sealing the vacuum cavity.
Claims22
A tunable coaxial magnetron, comprising:
- cathode means;
- anode means including vaned anodes surrounding said cathode means to define an interaction space therebetween;
- housing means surrounding said anode means forming a cavity thereabout;
- said anode means having apertures between selected vaned anodes for operating said interaction space to said cavity;
- a tuning housing mounted upon said housing means;
- a tuning nut rotatably retained within said tuning housing;
- a threaded shaft passing through said tuning housing;
- bellows means mounted within said tuning housing for enclosing said threaded shaft;
- and
- an elongated tuning member attached to said bellows means having an axis in said elongated direction along which said tuning member is adjusted into and out of said cavity by rotation of said tuning nut for adjusting the output frequency of said coaxial magnetron.
An improved tuning mechanism for an evacuated coaxial magnetron having a cathode-anode interaction space and a surrounding anode cavity, comprising:
- a tuning housing mounted upon said magnetron;
- bellows means having first and second end surfaces with said first surface mounted within said tuning housing;
- closure means mounted on said second surface of said bellows means;
- a single, substantially symmetrical tuning member attached to said closure means mounted on said bellows means and extending into said anode cavity;
- a tuning nut rotatively mounted within said tuning housing;
- and
- threaded shaft means passing through said rotatable tuning nut and mounted within said bellows means against said closure means wherein rotation of said tuning nut adjusts said threaded shaft means for adjusting said bellows and said tuning member attached to said bellows into and out of said anode cavity.
An improved tuning mechanism, as claimed in claim 13, wherein:
- said tuning member is a ceramic rod.
A tunable, coaxial magnetron, comprising:
- a cathode located along a central axis of said magnetron;
- a permanent magnet for generating a magnetic flux field;
- pole pieces for directing said magnetic flux field across said cathode in parallel to said central axis;
- a plurality of vaned anodes surrounding said cathode to form an interaction space therebetween;
- a housing forming an evacuated anode cavity surrounding said vaned anodes;
- passageways communicating between said interaction space and said anode cavity;
- terminal means for connecting said cathode to a negative, pulsating potential while maintaining said anodes at ground potential for generating an electric field between said cathode and anodes, crossed to said central axis;
- said anode cavity having an output;
- adjustable tuning means mounted in juxtaposition with said anode cavity;
- said adjustable tuning means including:
- a tuning housing;
- a tuning nut rotably mounted within said tuning housing;
- a bellows mounted within said tuning housing;
- a tuning member attached to said bellows and extending into said anode cavity along an axis parallel to said central axis and generally between said interaction space and said output;
- a threaded shaft passing through said tuning nut and attached to said bellows;
- wherein rotation of said tuning nut adjusts said tuning member into and out of said anode cavity for adjusting the output frequency of said magnetron.
Dependencies are inferred from the claim text.