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Method and device for measuring nonlinear vector network analyzer with accurate phase synchronization

A technology of vector network analysis and phase synchronization, applied in the field of nonlinear vector network analyzer measurement, can solve the problems of large phase noise, low measurement accuracy, and no "signal coherence", and achieves high accuracy, improved Phase stability, the effect of meeting the measurement requirements

Active Publication Date: 2020-09-15
NAT INST OF METROLOGY CHINA
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Problems solved by technology

[0003] At present, the measurement methods and devices of nonlinear vector network analyzers usually use 10MHz "frequency locking" to realize the phase synchronization of the test excitation signal and the phase reference signal, and the "signal Coherent", when the measured frequency band is increased to millimeter waves above 24-70 GHz, the phase noise is large, the measurement accuracy is low, and it cannot meet the high-accuracy measurement requirements

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  • Method and device for measuring nonlinear vector network analyzer with accurate phase synchronization
  • Method and device for measuring nonlinear vector network analyzer with accurate phase synchronization
  • Method and device for measuring nonlinear vector network analyzer with accurate phase synchronization

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[0047] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0048] As mentioned in the background art, at present, the measurement method and device of nonlinear vector network analyzer usually adopt 10MHz "frequency lock" to realize the phase synchronization of the test excitation signal and the phase reference signal, and the "signal coherence" is not realized. When the measured frequency band is increased to When the millimeter wave is above 24~70GHz, the phase noi...

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Abstract

The invention discloses a method and a device for measuring nonlinear vector network analyzer with accurate phase synchronization. The invention relates to the technical field of radio frequency microwave signal measurement, and mainly aims to improve the phase stability measured by a nonlinear vector network analyzer by realizing coherence of a test signal and a phase reference signal so as to meet the measurement requirement of high accuracy. The method comprises the following steps: generating a clock signal and a coherent local oscillator signal by using a preset signal source; generatinga synchronous intermediate frequency signal according to the clock signal; carrying out frequency mixing processing on the synchronous intermediate frequency signal and the local oscillator signal togenerate a synchronous radio frequency signal of a frequency band to be tested, wherein the synchronous radio frequency signal comprises a first radio frequency signal and a second radio frequency signal; and measuring the nonlinear vector network analyzer of the frequency band to be tested by using the first radio frequency signal and the second radio frequency signal. The method is suitable formeasurement of the nonlinear vector network analyzer with accurate phase synchronization.

Description

Technical field [0001] The invention relates to the technical field of radio frequency microwave signal measurement, in particular to a method and device for measuring a nonlinear vector network analyzer with precise phase synchronization. Background technique [0002] The Nonlinear Vector Network Analyzer (NVNA) is an instrument device for measuring and characterizing the nonlinear behavior of RF microwave devices. It introduces a multi-frequency component phase reference signal R, and uses the frequency point-by-frequency phase difference measurement between the measured signal and the reference signal to realize the phase spectrum measurement of the complex measured signal. [0003] At present, the measurement methods and devices of nonlinear vector network analyzers usually use 10MHz "frequency lock" to achieve the phase synchronization of the test excitation signal and the phase reference signal, without achieving "signal coherence". When the measured frequency band is increas...

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Application Information

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IPC IPC(8): G01R31/00H04B1/54
CPCG01R31/00H04B1/54
Inventor 张亦弛何昭郭晓涛聂梅宁黄见明张子龙王立峰杨瑷宁
Owner NAT INST OF METROLOGY CHINA
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