Abstract
It is shown that the accuracy of measurement of the microwave permeability of thin films in a short-circuited strip cell can be substantially enhanced through taking into account the S parameters of the interior irregularities of the cell with the use of a calibration procedure involving two mutually supplementing reference samples. One of the reference samples is chosen to be a composite ferromagnet with the known frequency dependence of the constitutive parameters, and the other can be a nonmagnetic metal strip. For small samples with a low magnetic susceptibility, the measurement error can be 10–20 times reduced as compared to standard methods. In addition, the effect of the permittivity on the measured value of the magnetic susceptibility is taken into account. The method is tested for measurements of the permeability of prototypes and can be applied to calibrate other nondemountable partly filledtransmission lines.
Published Version
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