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US 6,914,556 B1Granted
Method and apparatus for magnetron coherence
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorReuben E. Nyswander
Life of this patent
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Abstract
A pulsed magnetron is caused to emit a series of RF energy pulses which are phase coherent with an injection signal by supplying the magnetron with a pedestal pulse during low-power signal injection. The pedestal being of a magnitude and duration such that the slow-rise-time pedestal portion holds the magnetron in the Hartree region during the signal injection.
Claims11
A method of producing pulsed coherent radio frequency energy comprising:
- providing a resonant cavity oscillator with operating field and emission control voltages;
- applying a pedestal voltage pulse to the resonant cavity oscillator;
- applying a coherent injection signal to resonant cavity oscillator simultaneously with said pedestal voltage;
- and
- applying a drive pulse of shorter duration than said pedestal voltage pulse to the resonant cavity oscillator during the application of said pedestal voltage application such that the resonant cavity oscillator is caused to output a radio frequency energy pulse of the same duration as the drive pulse and coherent with said injection signal.
2 more elements
A system for providing a short-pulse-duration pulsed radio frequency signal comprising:
- a resonant cavity oscillator;
- conditioning signal source means effectively connected to said resonant cavity oscillator for supplying a pulsed signal having a predetermined amplitude insufficient to effect significant output from said resonant cavity device, but sufficient to permit oscillations to start;
- an injection signal source effectively connected to said resonant cavity oscillator for supplying a radio frequency signal thereto simultaneously with said conditioning signal;
- and
- drive signal source means effectively connected to said conditioning signal source means and to said resonant cavity oscillator for applying a trigger signal thereto in synchronism with said conditioning signal said trigger signal having a fast rise time and short duration as compared with said conditioning signal.
2 more elements
Dependencies are inferred from the claim text.