Electric heating – Microwave heating – With specific generator
Patent
1997-12-04
1999-03-16
Leung, Philip H.
Electric heating
Microwave heating
With specific generator
315 511, 315 537, 315 3963, 315200R, 313299, 331184, H05B 664, H01J 2502
Patent
active
058833684
ABSTRACT:
An apparatus for generating a microwave frequency energy includes a cathode for emitting electrons, a first grid for controlling and focusing the flow of electrons from the cathode, a choke structure for serving as a capacitor, wherein the cathode, the first grid and the choke structure define an input cavity functioning as a resonant circuit. The apparatus further includes a trimming resistor, one end of which is connected to the first grid and the other end thereof is connected the cathode, for inducing a bias voltage on the first grid, a second grid provided above the first grid and having a plurality of slots through which the electron beams passing through the slots of the first grid pass, an anode for receiving the electrons passing through the slot of the second grid, a voltage converting means for rectifying an AC input voltage and providing a DC driving voltage to the cathode and the anode, an antenna for extracting the microwave from an output cavity, the output cavity being defined by the second grid and the anode, and a feedback structure extending from the input cavity to the output cavity, for feeding a portion of the microwave frequency energy back to the input cavity.
REFERENCES:
patent: 2529668 (1950-11-01), Wang
patent: 3805111 (1974-04-01), Ryabinin et al.
patent: 4481447 (1984-11-01), Stupp et al.
patent: 5233269 (1993-08-01), Lien
patent: 5541391 (1996-07-01), Seong
Daewoo Electronics Co. Ltd.
Leung Philip H.
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