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首页> 外文期刊>Advances in Radio Science >Uncertainty of VNA S-parameter measurement due to non-ideal TMSO or LMSO calibration standards
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Uncertainty of VNA S-parameter measurement due to non-ideal TMSO or LMSO calibration standards

机译:由于不理想的TMSO或LMSO校准标准而导致的VNA S参数测量的不确定性

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For the widespread 12-term TMSO and LMSOcalibration of 4-sampler vector network analyzers (VNA),the sensitivity coefficients of the S-parameters of two-portsare developed as functions of the deviations of the reflectioncoefficients of the one-port calibration standards and ofan imperfect through or line connection. Expressions representingthe deviations of the S-parameters with respectto the error terms and for the deviations of the error termswith respect to the non-ideal calibration standards are alsogiven. It is shown that the deviations of the S-parametersbecome quite large particularly for high-reflective two-porttest objects. If applying a broadband load (instead of usingthe time consuming “ideal" sliding load routine) and theVNA-internal firmware-operated calibration and evaluationroutines where the reflection coefficient is set to zero, deviationsmay appear of some 0,1 dB for the attenuation andsome degrees of the transmission phase angle.
机译:对于四采样器矢量网络分析仪(VNA)的广泛的12项TMSO和LMSO校准,开发了两端口S参数的灵敏度系数,该系数是单端口校准标准件和反射器的反射系数偏差的函数。通过或线路连接不完善。还给出了表示S参数相对于误差项的偏差以及误差项相对于非理想校准标准的偏差的表达式。结果表明,特别是对于高反射两端口测试对象,S参数的偏差变得很大。如果施加宽带负载(而不是使用费时的“理想”滑动负载例程”)以及将反射系数设置为零的VNA内部固件操作的校准和评估例程,则衰减和某些程度的偏差可能会出现约0.1dB。传输相位角

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