The sophisticated properties of the microwave oven magnetron

Author

Brown, W.C.

Author_Institution

Microwave Power Transmission Syst., Weston, MA, USA

fYear

1989

fDate

13-15 June 1989

Firstpage

871

Abstract

The magnetron commonly used in the microwave oven has unusually low noise and long life resulting from an internal feedback process that limits the emission from the cathode to optimum values for these properties. Without compromising these properties the magnetron can be combined with external circuitry to lock the output phase to the input phase and simultaneously provide 30 dB of gain. The operation of the microwave oven magnetron is discussed with respect to its low noise generation and the self-regulation of filament temperature to minimize noise and maximize long life. The operation of the magnetron as a high-gain, phase-locked amplifier is considered.<>

Keywords

electron device noise; electron tube testing; life testing; magnetrons; microwave amplifiers; ovens; radiofrequency heating; 30 dB; cathode emission limits; filament temperature; gain; internal feedback process; long life; low noise; microwave oven magnetron; output phase locking; phase-locked amplifier; Cathodes; Circuit noise; Feedback; Gain; Magnetic circuits; Magnetic properties; Microwave generation; Microwave ovens; Noise generators; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1989., IEEE MTT-S International

Conference_Location

Long Beach, CA, USA

Type

conf

DOI

10.1109/MWSYM.1989.38861

Filename

38861