A phase-continuous fine-step frequency source

Abstract

The invention discloses a fine-step frequency source with continuous phase. The frequency source includes: an amplification power division unit, a DDS unit, and a switch amplification unit; the amplification power division unit performs power amplification and power distribution on an external reference signal to obtain multiple One road reference clock signal; the DDS unit uses each reference clock signal to generate one road radio frequency signal corresponding to the reference clock signal; the switch amplifying unit switches and amplifies each road radio frequency signal, and outputs a fine step Signal. The phase-continuous fine-step frequency source provided by the invention can solve the phase-continuity problem after signal switching by setting an amplification power division unit, a multi-channel DDS unit and a switch.

Description

technical field [0001] The present application relates to the field of frequency sources, in particular to a phase-continuous fine-step frequency source. Background technique [0002] The frequency source is the core component of the radar system. Its function is to generate various frequency signals for the radar system. The performance of the frequency source directly determines the power of the radar system. The frequency source is realized by frequency synthesis technology, and there are three basic methods: direct frequency synthesis, indirect frequency synthesis (PLL) and direct digital frequency synthesis (DDS). Because DDS has the advantages of high frequency resolution, fast frequency point conversion speed, and low phase noise, the fine step frequency source is generally realized by DDS technology. [0003] The electronic environment of the modern battlefield is complex, which puts forward higher and higher requirements for the anti-jamming ability of the radar sy...

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