MICROWAVE FREQUENCY ENERGY GENERATING APPARATUS PROVIDED WITH A VOLTAGE CONVERTING MEANS

摘要

An apparatus for generating a microwave frequency energyincludes a cathode for emitting electrons, a first grid forcontrolling and focusing the flow of electrons from thecathode, a choke structure for serving as a capacitor, whereinthe cathode, the first grid and the choke structure define aninput cavity functioning as a resonant circuit. The apparatusfurther includes a trimming resistor, one end of which isconnected to the first grid and the other end thereof isconnected the cathode, for inducing a bias voltage on thefirst grid, a second grid provided above the first grid andhaving a plurality of slots through which the electron beamspassing through the slots of the first grid pass, an anode forreceiving the electrons passing through the slot of the secondgrid, a voltage converting means for rectifying an AC inputvoltage and providing a DC driving voltage to the cathode andthe anode, an antenna for extracting the microwave from anoutput cavity, the output cavity being defined by the secondgrid and the anode, and a feedback structure extending fromthe input cavity to the output cavity, for feeding a portionof the microwave frequency energy back to the input cavity.