Microwave generator with virtual cathode oscillator and open reflectors
AssigneeCommissariat A L'Energie Atomique et Aux Energies Altemativer
InventorsStephanie CHAMPEAUX, Philippe GOUARD
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Abstract
A device for generating microwaves with an oscillating virtual cathode includes a cathode, and a thin anode positioned at an inlet of a cylindrical waveguide. The waveguide includes at least one first open reflector and one last open reflector that are transparent to electrons and capable of reflecting a microwave created by at least one virtual cathode generated in the waveguide. A plurality of open reflectors are between the first and last open reflector, such that a designated reflector of the plurality of open reflectors has a radius R(i+1) less than or equal to a radius Ri of an immediately preceding reflector and the last open reflector has a radius RN less than a radius R1 of the first open reflector.
Claims9
A microwave wave generator device with a virtual cathode oscillator, in axial configuration, comprising a cathode (2), and a thin anode (4) positioned at an entrance to a cylindrical wave guide (5) of radius RG, the thin anode (4) being situated between the cathode (2) and the wave guide (5), the device further comprising at least a first open reflector (9) and a last open reflector (9) which are located in the wave guide (5), and transparent to electrons and configured to reflect a microwave wave (7) created by at least one virtual cathode (6) generated in the wave guide (5), the first open reflector (9) being the closest reflector to the thin anode (4), and the last open reflector (9) being the closest reflector to an exit from the wave guide (5), the device being characterized in that it comprises a plurality of open reflectors (9), among which are the first and the last open reflector (9) such that a reflector of the plurality has a radius RR(i+1) less than or equal to a radius RRi of a directly preceding reflector of the plurality and in that the last open reflector (9) has a radius RRN less than a radius RR1 of the first open reflector (9).
Dependencies are inferred from the claim text.