Pulse oscillator with electronic frequency switching in millimeter frequency range

摘要

The results of development of pulse mode oscillators with electronic frequency switching from pulse to pulse are given. Small-sized frequency synthesizer of 8 mm wavelengths forming pulses of specified duration with amplitude 1–1.2 W is used as a high stable driving oscillator of microwave pulse. Synchronized amplifier made on IMPATT diodes provides power up to 20 W in oscillator output with microwave pulse duration of impulses of 100–300 nanoseconds in an operating band ∼10%. The matching of high-frequency loadings and IMPATT structure is reached by installing a diode in a parallel resonance circuit which parameters are determined by selection of the geometrical sizes of dielectric bushing and type of mounting. Thus, the additional inhomogeneity in a waveguide channel is excluded. The reserved power is concentrated basically in the packaged diode field. For expansion of an amplifier-operating band consistently with a parallel resonance diode circuit, it is expedient to include a consecutive resonance circuit that essentially reduces diode susceptance and increases a synchronization band in the frequency range. The developed oscillator can be used as a driving source for synchronization of semiconductor and electro vacuum powerful devices of the pulse mode.