AN IMPROVED DE-EMBEDDING TECHNIQUE FOR THE MEASUREMENT OF THE COMPLEXCONSTITUTIVE PARAMETERS OF MATERIALS USING A STRIPLINE FIELD APPLICATOR

A method for measuring the electromagnetic constitutive parameters of materials using a strip transmission-line field applicator is presente d. A technique is developed to measure the scattering parameters of th e imperfect transition regions between the applicator coaxial terminal ports and the front and back terminal planes of the material sample i n strip-line. S-parameters of the sample region are subsequently de-em bedded from the coaxial-terminal S-parameters using the measured trans ition-region network model. The complex permittivity and permeability of the sample are easily related to the sample's S-parameters through well known analytic relations. Measured constitutive parameters are pr esented for several representative materials.