TITLE

Low-noise microwave magnetrons by azimuthally varying axial magnetic field

AUTHOR(S)
Neculaes, V.B.; Gilgenbach, R.M.; Lau, Y.Y.
PUB. DATE
September 2003
SOURCE
Applied Physics Letters;9/8/2003, Vol. 83 Issue 10, p1938
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A technique has been demonstrated to significantly reduce the noise in microwave oven magnetrons. The technique employs permanent magnets to generate an azimuthally varying axial magnetic field. Noise measurements are reported which show dramatic reductions in the noise of kW oven magnetrons operating near 2.45 GHz. The noise reduction near the carrier is some 30 dB. Microwave sidebands are reduced or eliminated. Noise reduction occurs at all anode currents, but is particularly significant at low current near the start-oscillation condition. © 2003 American Institute of Physics.
ACCESSION #
10719143

 

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