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US 9,000,670 B2Granted
Harmonic mode magnetron
AssigneeL-3 Communications Corporation
InventorNeil G. Whyman
Life of this patent
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Abstract
A novel magnetron achieves increased power output at high frequencies by replacing a typical resonant cavity with a slow-wave waveguide structure. Waveguides built into the anode body sustain oscillations having phase change coefficients of 2*pi*n radians per section, where n is a positive integer. The magnetron is capable of supporting RF oscillations at frequency harmonics of the fundamental frequency, permitting it to operate at frequencies double or quadruple that of a similarly sized conventional magnetron.
Claims12
A harmonic mode magnetron for converting DC electrical current to radio frequency (RF) power comprising:
- an anode body formed from a conductive material and including a central cavity;
- and
- a cathode fixed within the central cavity of the anode body;
- wherein the anode body further comprises at least two slow-wave waveguide structures formed within the anode body, each slow-wave waveguide structure comprising a channel having a rectangular cross section cutting through the anode body in a continuous path and having two openings into the central cavity such that the two openings and the channel define a central column of anode body material between them and wherein the central column forms one broadwall of the slow-wave waveguide structure and wherein another broadwall of the slow-wave waveguide structure is formed from the anode body.
1 more element
Dependencies are inferred from the claim text.