Reduction of noise in strapped magnetron by electric priming using anode shape modification

摘要

Noise reduction in a 2.45 GHz strapped magnetron oscillator is experimentally demonstrated by electric priming using anode shape modification. The sideband noise is reduced by approximately 15 dB at the nominal operating current and by 28 dB at the start-oscillation current; this is due to electron prebunching into the π mode, resulting from the modulation of the drift velocity of the electrons by an azimuthally periodic electric field. In this experiment, a 4.3 kV-330 mA half-wave rectified input power is employed.