Phase noise reduction in a gyroklystron amplifier |
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| Authors: | G. S. PARK V. L. GRANATSTEIN J. McADOO C. M. ARMSTRONG A. H. McCURDY S. Y. PARK |
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| Affiliation: | 1. Laboratory for Plasma Research, University of Maryland , College Park, MD, 20742, U.S.A.;2. Code 6840, Naval Research Laboratory , Washington, DC, 20375, U.S.A.;3. Omega-P, Inc , New Haven, CT, 06520, U.S.A. |
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| Abstract: | A fast feedback loop is employed to reduce conventional phase fluctuation in a klystron and a gyroklystron using both proportional and proportional-integral type feedback circuits. Phase fluctuation of less than one degree is achieved in both the klystron and gyroklystron by using a proportional type feedback circuit; in the klystron, 1.8 degrees of phase jitter is reduced to 0.8 degrees and in the gryroklystron 1.9 degrees to 0.9 degrees. These results agree well with theory. A superior phase jitter reduction ratio of approximately 0.3 is demonstrated in both the klystron and gyroklystron by adding an integrating circuit. |
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