Electronic calibration part of vector network analyzer and calibration method

Abstract

The invention provides an electronic calibration part of a vector network analyzer. An electronic standard of the electronic calibration part of the vector network analyzer is integrated on a monolithic microwave integrated circuit, and the electronic calibration part of the vector network analyzer comprises six independent reflection standards, a transmission standard, a nonvolatile store and a USB interface controller, wherein a computer controls a multi-choice switch to carry out selection on the standards and to carry out combination to realize eighteen standards, the nonvolatile store is used for storing definite value data, and the USB interface controller is used for carrying out outward transmission on the data stored in the nonvolatile store. The electronic calibration part of the vector network analyzer and an electronic calibration method reduce influence of interpolation errors and partial bad standards, and effectively improve the electronic calibration accuracy of the vector network analyzer.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to an electronic calibration part of a vector network analyzer, and also to an electronic calibration method. Background technique [0002] Vector network analyzers use calibration and vector error correction to improve measurement accuracy, and electronic calibration based on electronic calibration components is becoming more and more widely used. In electronic calibration, the fixed value accuracy of each electronic standard in the electronic calibration unit and the vector error correction method based on the electronic calibration unit are the key to determine the measurement accuracy of the final vector network analyzer. [0003] The measurement and setting of each electronic standard of the electronic calibrator is carried out before leaving the factory. At present, the calibration of electronic standards is usually done uniformly at certain frequency intervals within its...

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Problems solved by technology

[0028] 1. Fixed frequency interval, in the frequency band where the characteristics change drastically, the interpolation method will bring a large error, resulting in a decrease in calibration accuracy

like Figure 4 As shown, due to the rapid change of electronic standard characteristics between frequencies A and B, it is difficult to accurately obtain the data between fixed frequency points by interpolation method

But blindly reducing the fixed value frequency interval ΔF will cause too much fixed value data, and the fixed value workload will be too large;

[0029] 2. The characteristics of electronic standards are different, and the setting accuracy is also different. The standard with large setting uncertainty ("bad standard") will affect and reduce the final calibration accuracy

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