Self-calibration method of vector network analyzer based on ten-error model

Abstract

The invention discloses a self-calibration method of a vector network analyzer based on a ten-error model. The method specifically comprises the following steps: 101) an initialization step, 102) a calibration standard component parameter setting step, 103) a calibration standard component parameter acquisition step, 104) a correction step, 105) a transformation processing step, 106) a step of calculating to obtain corresponding parameters, and 107) a test step. The invention provides the self-calibration method of a vector network analyzer based on a ten-error model, which only needs to calibrate the delay tau of a standard part Thru and the direct current resistance RM of an insertion loss IL and a load standard part Match (Load), and other calibration standard part parameters are automatically calculated in the calibration process.

Description

technical field [0001] The invention relates to the field of radio frequency microsystems, more specifically, it relates to a self-calibration method of a vector network analyzer based on a ten-term error model. Background technique [0002] S-parameters (scattering parameters) are the most common and important test parameters in the field of RF and microwave. They need to be measured with vector network analysis instruments. Unlike other instruments, vector network analysis instruments need to be calibrated to correct system errors before testing. The calibration method Pros and cons determine the accuracy of the calibration results and ultimately directly affect the quality of the test results. Calibration types are generally divided into three forms: coaxial, on-chip, and waveguide according to the type of test port; the calibration process is a post-processing mathematical operation process, and the necessary pre-data is obtained by connecting the test calibration standa...

AI Technical Summary

Problems solved by technology

[0004] Although the most common SOLT (TOSM) method is simple to operate, it is highly dependent on the accuracy of the calibration standard. The parameters of the calibration standard must be completely and precisely defined. The accuracy of the calibration standard is generally given by the third-order model parameters, but the model parameters vary with The accuracy of high-frequency testing is poor, and the wear and tear of each connection will bring a certain deviation to the model parameters. This method is not suitable for high-frequency and high-precision testing; other common TRL (Thru-Reflect- Although the Line) method has little dependence on the accuracy of the calibration standard and high accuracy, it is limited by the test frequency range. The frequency range requires that the ratio of the start-to-stop frequency be less than 1:8. When the frequency is very low (generally ≤1GH), the size of the transmission line Line is too large. Long, difficult to manufacture and use, and at the same time, this method has high requirements for personnel operation, which is very easy to cause damage and the scope of use is limited

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