Microwave oven equipped with a structurally simple microwave gen

Details Microwave oven equipped with a structurally simple microwave gen Microwave oven equipped with a structurally simple microwave gen

1998-06-23

1999-06-22

Leung, Philip H.

Electric heating

Microwave heating

With specific generator

315 511, 315 537, 315 3963, 313299, 331184, H05B 664, H01J 2502

Patent

active

059140674

ABSTRACT:
A microwave oven includes a microwave generating apparatus having a cathode, a first grid for controlling the flow of electrons from the cathode, the first grid having holes for converting electrons from the cathode to the electron beams, a choke structure, positioned between the cathode and the first grid, for serving as a blocking capacitor, wherein the cathode, the first grid and the choke structure define an input cavity functioning as a resonant circuit, a resistor, one end of which is connected to the first grid and the other end thereof is connected to the cathode, for inducing a bias voltage on the first grid, a second grid provided above the first grid and having holes through which the electron beams passing through holes of the first grid pass, an anode for receiving the electrons passing through the holes of the second grid, wherein the second grid and the anode define an output cavity for generating a microwave, the output cavity being electrically insulated from the input cavity, and a driving voltage source for providing a driving voltage to the cathode and the anode. The choke structure includes a grid holder provided between the first grid and the cathode and a plate supported by the grid holder, the plate being formed with a film of metal on its inside and outside surfaces and being provided with an insulating portion for preventing an electrical connection with the cathode.

REFERENCES:
patent: 2529668 (1950-11-01), Wang
patent: 3805111 (1974-04-01), Ryabinin et al.
patent: 5233269 (1993-08-01), Lien
patent: 5541391 (1996-07-01), Seong

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