Precision measure of microwave two-port networks

In the microwave network S parameters testing, often use power distributors, directional couplers and switch microwave components, these microwave components performance is often not the ideal. Therefore, the microwave components in a test system measurement S parameters there must be the measurement error. This paper setup the measure error model of microwave two-port networks, Study the method of S parameters measure error correct. And make use of computer technology to design the Microwave two-port networks´s S parameters automatic test system, and related measurement program design, realization of precision measurements of the S parameters. Measure results have verified the method And the system is sound. Amplitude relative error of measure S parameters is 0.56% and phase relative error is 0.47%.