X waveband fine stepped frequency synthesizer generating method and system

A fine-stepping, X-band technology, applied in the field of X-band fine-stepping frequency synthesis generation method and system, can solve problems such as narrow output bandwidth, low operating frequency, poor performance such as phase and noise, and achieve good purity and quality The effect of high, excellent phase noise characteristics

Active Publication Date: 2019-03-01
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above frequency synthesis technologies have their own advantages and disadvantages. For example, PLL has high operating frequency and wide output bandwidth, but its phase and noise performance is poor; DDS has fine frequency steps and good phase noise, but its operating frequency is low and its output bandwidth is narrow.

Method used

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  • X waveband fine stepped frequency synthesizer generating method and system
  • X waveband fine stepped frequency synthesizer generating method and system
  • X waveband fine stepped frequency synthesizer generating method and system

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Embodiment Construction

[0023] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0024] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0025] Glossary

[0026] DDS is the English abbreviation of Direct Digital Synthesizer (Direct Digital Synthesizer). Compared with traditional frequency synthesizers, DDS has the advantages of low cost, low power consumption, high resolution and fast conversion, and is widely used in telecommunications and electronics. In the field of instruments, it is a key technology to realize the full digitalization of equipment.

[0027] The invention utilizes the characteristics that the signal purity and pha...

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Abstract

The invention discloses an X waveband fine stepped frequency synthesizer generating method and system, wherein the method comprises the following steps: (1) generating a frequency mixing local oscillator signal; (2) generating a Direct Digital Synthesis DDS baseband signal; (3) performing frequency mixing on the frequency mixing local oscillator signal and the DDS baseband signal to form frequencysynthesizer signal output. The method in the invention is optimized and improved based on the traditional frequency synthetic technology; a circuit structure of the DDS in combination with frequencymultiplication frequency mixing is designed, thereby realizing generation of the frequency synthesizer signal that operates at the X waveband with the frequency step reaching 1 KHz and taking the excellent phase noise characteristic and the good spurious suppression capability into account as well; the generation difficulty of the high-band and fine frequency stepped frequency synthesizer signalsis solved in engineering; and local oscillator signals with good purity and high quality can be provided for frequency conversion channels.

Description

technical field [0001] The invention relates to the field of frequency synthesis, in particular to a method and system for generating X-band fine-step frequency synthesis. Background technique [0002] Frequency synthesis is to process a high-precision, high-stability reference source through signal processing such as frequency mixing, frequency multiplication, and frequency division, and to generate a large number of signals with the same accuracy and The frequency synthesized signal of stability. Frequency synthesizer is a key device that determines the performance of electronic systems, and it plays an increasingly important role in military and civilian electronic equipment such as communications, radar, and guidance. [0003] The key indicators of the frequency source include the working frequency band, frequency step, phase noise, spurious suppression, etc., and each indicator is mutually restricted, and a reasonable design solution needs to be selected according to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/185
CPCH03L7/185H03L2207/12
Inventor 张文锋刘武广李玉成金广华丁庆高阳
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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