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US 4,087,718 AGranted
High gain crossed field amplifier
AssigneeVarian Associates, Inc.
InventorGeorge K. Farney
Life of this patent
Estimating the term…
Abstract
The allowable gain of a crossed-field amplifier tube is increased by tapering the slow-wave interaction circuit to a smaller spatial period in the direction of circuit power flow. Concurrent variation of the electron beam drift velocity by tapering the dc electric or magnetic field further improves the gain and efficiency.
Claims6
A crossed-field amplifier comprising:
- a periodic slow-wave circuit extending over a path between an input end and an output end, cathode means spaced from said circuit and extending over the length of said path, said cathode means applied to operate at a potential negative to said circuit and to generate a stream of electrons between said cathode and said circuit, means for coupling electromagnetic wave energy into said input end, means for coupling electromagnetic wave energy from said output end, the spatial period of said circuit decreasing over a substantial portion of said path from said input end to said output end;
- and means for tapering the electron drift velocity along said path.
Dependencies are inferred from the claim text.