X-band signal synthesis method and X-band agile frequency synthesizer

Abstract

The invention discloses an X-band signal synthesis method and an X-band agile frequency synthesizer for realizing the X-band signal synthesis method. The X-band agile frequency synthesizer comprises acomb spectrum signal generator, a power divider, a surface acoustic wave filter assembly, a double radio frequency switch assembly and a mixing filter assembly. A series of frequency points of an L wave band are selected; effective filtering processing is carried out through the miniaturized surface acoustic wave filter assembly, the problems that a traditional direct frequency synthesis method is large in size, large in power consumption and the like are effectively solved, the problems that spurious difference, phase noise difference and long frequency hopping time exist in classic phase-locked loop frequency synthesis are also solved, and the index performance of the frequency synthesizer is comprehensively improved.

Description

technical field [0001] The invention relates to microwave direct frequency synthesis technology, in particular to an X-band signal synthesis method and an X-band agile frequency synthesizer. Background technique [0002] According to the IEEE 521-2002 standard, the X-band refers to the radio wave band with a frequency of 8-12GHz, which belongs to microwaves in the electromagnetic spectrum. The X-band has space research, broadcast satellites, fixed communication service satellites, earth exploration satellites, Meteorological satellites, etc. [0003] X-band signals are usually obtained by frequency synthesis. Frequency synthesis is to perform mathematical addition, subtraction, multiplication, and division operations on a highly stable reference signal (generally tens of megahertz to one or two hundred megahertz) through signal processing such as frequency multiplication, frequency division, and frequency mixing. The process of generating the desired target frequency signa...

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of poor phase noise index, phase detection spurious leakage, and slow frequency switching time, the phase-locked loop cannot meet the needs of high-demand applications.

However, the traditional direct frequency synthesis method has problems such as large equipment size and high power consumption.

[0004] Therefore, the present invention discloses an X-band signal synthesis method and an X-band agile frequency synthesizer. The frequency synthesizer selects a series of frequency points in the L-band, And through the miniaturized SAW filter component for effective filtering processing, it effectively solves the problems of large volume and large power consumption of the traditional direct frequency synthesis method, and also solves the spurious difference and phase noise of the classic phase-locked loop frequency synthesis. Poor, long frequency hopping time problems, comprehensively improve the index performance of the frequency synthesizer

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