Phase response calibration method of nonlinear vector network analyzer based on fine frequency grid calibration

A technology of vector network analysis and calibration method, which is applied in the field of calibration of nonlinear vector network analyzers, can solve the problem of low frequency resolution of phase calibration, and achieve the effect of high frequency resolution

Inactive Publication Date: 2011-06-08
HARBIN INST OF TECH
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Problems solved by technology

[0003] The present invention aims to solve the problem of low frequency resolution of phase calibration in the phase calibration of existing nonlinear vector network analyzers, and provides a new method of fine frequency phase response calibration for nonlinear vector network analyzers based on fine frequency grid calibration. method

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  • Phase response calibration method of nonlinear vector network analyzer based on fine frequency grid calibration
  • Phase response calibration method of nonlinear vector network analyzer based on fine frequency grid calibration
  • Phase response calibration method of nonlinear vector network analyzer based on fine frequency grid calibration

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specific Embodiment approach 1

[0031] The specific embodiment one, the method for the phase response calibration of nonlinear vector network analyzer based on fine frequency grid calibration, it is realized by the following steps:

[0032] Step 1. Use a broadband sampling oscilloscope to detect a radio frequency amplitude modulation signal x AM (t), and employ a square rate detector in the AM signal x AM (t) carrier frequency f c Construct fine frequency gratings on both sides of ;

[0033] The AM signal x AM The expression of (t) is:

[0034]

[0035]

[0036] Where: f c is the carrier frequency and the modulation frequency is f mod , the upper side frequency and lower side frequency are f c -f mod and f c +f mod , V 1 , V 2 , V 3 are the voltages at the above frequency points, respectively, is the phase of the above frequency point;

[0037] Step 2, using the fine frequency grating constructed in step 1 to perform phase calibration on the square rate detector to obtain the fine freque...

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Abstract

The invention relates to a nonlinear vector network analyzer calibration method, in particular relating to a phase response calibration method of a nonlinear vector network analyzer based on fine frequency grid calibration. The method provided by the invention can be used for the problem that the existing phase response calibration method of a nonlinear network analyzer has low phase calibration frequency resolution. The method comprises: constructing an amplitude modulation signal xAM(t); constructing a fine frequency grid on both sides of a carrier frequency fc; calibrating the phase of a square law detector by use of the fine frequency grid to obtain the phase transmission standard of the fine frequency grid; and carrying out fine frequency phase calibration of the nonlinear vector network analyzer by use of the phase transmission standard of the fine frequency grid. The method is applicable to the phase calibration of the nonlinear vector network analyzer.

Description

technical field [0001] The invention relates to a calibration method of a nonlinear vector network analyzer. Background technique [0002] In the 1990s, with the advancement of radio frequency and microwave theory and technology, the demand for direct measurement of complex large signals of circuits, devices and systems containing nonlinear components has become more and more prominent, and the nonlinear vector network analyzer is directly completed The best tool for large signal network analysis. The phase calibration of nonlinear vector network analyzer (NVNA) can only be obtained by NTN calibration method in my country at present, and its calibration frequency resolution can only reach 0.25GHz. Maintenance urgently needed. Contents of the invention [0003] The present invention aims to solve the problem of low frequency resolution of phase calibration in the phase calibration of existing nonlinear vector network analyzers, and provides a new method of fine frequency p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G01R27/28
Inventor 时颖徐清华张亦弛林茂六张喆
Owner HARBIN INST OF TECH
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