A Time Domain Compensation Method for Vector Network Analyzer

Abstract

The invention discloses a time-domain compensation method for a vector network analyzer, comprising: transforming the scattering parameters measured in the frequency domain into the time domain through inverse Fourier transform, and obtaining the time-domain data of reflection parameters and transmission parameters respectively; Each network has a different position in the time domain data. According to the position of each network in the time domain data, a time domain gating function is constructed; using the gating function, the time domain data of reflection parameters and transmission parameters are gated, Obtain the time-domain gating data of each network; transform the time-domain data after time-domain gating through Fourier transform to obtain the frequency-domain gating data; construct the compensation factor and use the shadowing compensation formula to obtain the reflection parameters and Transfer parameters. With the invention, the scattering parameters of the local network in the microwave circuit can be observed without errors. In addition, the method of the invention is simple and intuitive, reduces the work difficulty of operators, and has better compensation results.

Description

technical field [0001] The invention belongs to the technical field of signal analysis, in particular to a time domain compensation method of a vector network analyzer. Background technique [0002] A vector network analyzer is an electronic measuring instrument used in microwave engineering to measure the scattering parameters of a microwave circuit network, and the scattering parameter is the most commonly used parameter index in microwave engineering to describe the performance of a microwave circuit network. In a microwave circuit, a circuit system is often formed by cascading multiple microwave networks, and the cascaded networks are coupled and interact with each other. The vector network analyzer can only measure the scattering parameters of the microwave circuit system as a whole, and the Scattering parameters of some of these networks cannot be measured. In work, it is often necessary to know the scattering parameters of some networks in the circuit under test, but...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a time-domain compensation method of a vector network analyzer, aiming to solve the problem that existing vector network analyzers are not easy to construct a network model of an unknown network and determine each parameter in the model, and the accuracy of the empirical model is relatively low. Low, not intuitive enough, complicated process, high requirements for operators

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