Abstract: With the aim to achieve efficient measurement and reduce the complexity of measurement parameter settings caused by various types of devices under test, this paper designs the S-parameter automatic calibration software with multi-thread and modular structure of C# by analyzing the working principle and performance characteristics of the microwave network S-parameter measurement system. The S-parameter automatic calibration software establishes the database in various types of devices under test, the parameter of standard parts and the test flow of the S-parameter measurement system. The software also establishes the measurement uncertainty model of the measured parameter. The reflection parameter and transmission parameter can be tested by using vector network analyzer with automatic calibration software. It can be found that the test results of automatic calibration software are in high consistency with those of manual test through experiments.

Key words: Microwave devices, S-parameter, Automatic calibration software, Database, Measurement uncertainty