Theoretical studies of magnetron noise by means of two-dimensional simulation

The two-dimensional simulation of the electron flow-UHF field interaction allows to calculate the spectral characteristics in varying points of the volt-amper characteristic and to describe the main noise properties. The calculations of the magnetron frequency spectrum made for different amplitudes of the UHF signal show the existence of three clear regions. When the UHF field has a low amplitude, the equivalent induced current spectrum contains a variety of sideband peaks. This corresponds to high noise at low anode currents. The high UHF field amplitude shows quite low noise in the equivalent induced current spectrum. The validity of the two-dimensional computer model used to investigate the factors that influence magnetron noise characteristics is confirmed by the correspondence of the noise spectrum calculations with the experimental data.