Measurement calibration method for multi-characteristic impedance network

Abstract

The invention provides a measurement calibration method for a multi-characteristic impedance network. The method comprises the following steps: firstly, defining the connector type of each port of a tested piece and a used calibration piece respectively, defining the port characteristic impedance of a vector network analyzer while defining the connector type of the port, and reading the characteristic impedance information of the port from the definition of a connector by using a calibration program, wherein the definition of the connector type includes the characteristic impedance information; secondly, determining six system errors through single-port reflection calibration by using an eight-vector error correction model; and lastly, connecting a characteristic reciprocal adapter between two ports, and solving a last error via through calibration. According to the measurement calibration method for the multi-characteristic impedance network provided by the invention, measurement of all S parameters in the multi-characteristic impedance network can be realized; and additional calibration steps in a measurement calibration are not needed, and easiness, convenience and high measuring accuracy are realized.

Description

technical field [0001] The invention relates to the field of microwaves, in particular to a method for measuring and calibrating a multi-characteristic impedance network. Background technique [0002] The vector network analyzer is the most typical and commonly used instrument for measuring the performance indicators of microwave and millimeter wave devices. Due to the non-ideal characteristics of hardware technical indicators such as vector network analyzers and test cable accessories, when using a vector network analyzer to measure the DUT , must first be calibrated to determine the errors existing in the measurement system, and then eliminate various measurement errors through error correction in order to obtain accurate measurement results. During the calibration process, various calibration standards with known performance parameters are measured, and by comparing the measured value with the known value, the measurement error existing in the measurement system of the ve...

AI Technical Summary

Problems solved by technology

[0004] The above three calibration methods can only use one calibration piece during the calibration process, and the characteristic impedance of the calibration piece must be the same as the system impedance of the vector network analyzer. Therefore, only single-port reflection can be performed when performing multi-characteristic impedance network measurements. Calibration. After the vector network analyzer is calibrated, it can only measure the reflection parameters of the multi-characteristic impedance network. During the measurement, a high-quality matching load must be connected to the non-measurement port of the DUT, and the transmission parameters of the DUT cannot be directly measured. Measurement, the measurement results are not comprehensive, and the performance of the tested part cannot be fully evaluated

Images