Non-standard Network Analyzer Calibration Technology And Its Singular Points,

The error correction of measurement system is very important in the measurement of S-parameter of microwave network used network analyzer. The nonstandard calibration of network analyzer can solve the problems that the port types of devices under test are various and standard kits are expensive in the measurement of S-parameter. Thus,the research of the nonstandard calibration technology and oddity point is significant.First, a research is done in this paper about error correction methods of network analyzer, including the analysis of the network analyzer principle, the establishment of error model and the acquirement of standard calibration method and nonstandard calibration method. Based on 12-Error Module, the SOLT(SHORT+OPEN+LOAD+ THRU)method which is standard calibration one and the SLT(SHORT+LINE+ THRU)method which is nonstandard calibration one are obtained. Then,8-Error Module is established,and the OSL(OPEN+ SHORT+LOAD)method and the SLT method which are standard calibration ones and the TLS(THRU+LINE+ SHORT)method which is nonstandard calibration one are obtained on the basis of the error module. Good measurement results can be acquired by using nonstandard calibration technology that is proved by experiment.Secondly, oddity point maybe appear in the measurement results after network analyzer is corrected by nonstandard calibration technology. The reason may be that transmission line's parameter used in the nonstandard calibration method is unknown. So, this paper makes a discussion about oddity point by the analysis of the TSM (THRUG+SHORT+MATCH) method, the TOM (THRU+OPEN+ MATCH)method, the TS(THRUG+SHORT)method and the TO(THRU+ OPEN)method.Finally,computer aid measurement correction system is set up. The experiment is done in this system. It proves that nonstandard calibration technology is feasible and oddity point problem is avoidable.