A recent breakthrough at the University of Michigan has demonstrated that application of an azimuthally-varying axial magnetic field to a magnetron causes a dramatic reduction (-30 dB) in the microwave noise near the carrier and elimination of the sidebands (spurs). Another advantage of azimuthally-varying axial magnetic fields is "magnetic priming" in which the magnetron pi-mode oscillation-startup is hastened, especially when N/2 periods of magnetic perturbation are applied to an N-cavity magnetron. These experiments have been performed on kW microwave oven magnetrons. Computational simulations have also been performed in both 2-D and 3-D that verify the effects on rapid startup and noise observed experimentally.


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    Title :

    Low-noise operation and magnetic-priming of magnetrons by azimuthally-varying axial magnetic fields


    Contributors:
    Gilgenbach, R.M. (author) / Neculaes, V.B. (author) / Jones, M.C. (author) / Lau, Y.Y. (author) / White, W. (author) / Luginsland, J.W. (author) / Jordan, N. (author) / Pengvanich, P. (author) / Hidaka, Y. (author) / Hoff, B.W. (author)


    Publication date :

    2004-01-01


    Size :

    132100 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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