Phase Noise Reduction Device for Pulse Radar Transmitter

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high voltage power supply constituting a transmitter for a pulse radar. In particular, phase noise of a pulse radar transmitter is synchronized by synchronizing the ON / OFF frequency of a resonant inverter in the high voltage power supply with the pulse frequency of a modulator. The present invention relates to a device for reducing phase noise of a pulse radar transmitter capable of reducing the noise, and comprising: a modulator for converting an input pulse signal into a high voltage pulse signal for driving a microwave tube and applying the same to a grid electrode of the microwave tube; A pulse signal connected to the pulse signal applied in parallel, and synchronized with the input pulse signal to output an operation / non-operation control signal of the large power switching circuit of the resonant inverter, and according to the switching control signal of the tuner. The resonant inverter performing high power switching and the output of the resonant inverter are 1 It consists of a high voltage transformer applied to the side winding and inducing a high voltage to the secondary winding, and a rectifying and smoothing unit rectifying the secondary voltage of the high voltage transformer and smoothing it with a capacitor to generate the high voltage DC voltage required by the microwave tube. By synchronizing the pulse signal with the switching operation / non-operation frequency, the phase noise can be improved by about 15 dB or more.