DEVELOPMENT OF THE ESTIMATION SYSTEM OF ELECTRIC PARAMETERS FOR MANY TYPES OF MATERIALS AND ITS EVALUATION

We developed the estimation system of electric parameters. For the non-magnetic materials, the estimated relative permeability was the same as the nominal values. For the ferromagnetic materials, the estimated relative permeability varied 0 % to 30 % from the nominal values. For both types of materials, the estimated conductivities were 0 % to 9.8 % different from nominal values. Next, we apply our estimation method to shielding sheets, and we can estimate the electric parameters for items such as thin cloths. Then, we estimate the dielectric constant for liquid materials. The accuracy is such that the estimated value is different from the nominal value by less than 2%. These results show that we have successfully developed an estimation system of electric parameters for these cases. Using our estimation system, we can estimate considering the frequency characteristics for electric parameters in about 2 minutes