Characterization of Biaxial Materials Using a Partially-Filled Rectangular Waveguide
关键词:
Anisotropic, biaxial, material measurement, permeability, permittivity, waveguide摘要
A technique is proposed to measure the permittivity and permeability parameters of a sample of biaxial material placed into a rectangular waveguide. By constructing the material as a cube, only a single sample is required to find all six material parameters. The sample is inserted into the waveguide in multiple orientations, and the transmission and reflection coefficients of the sample region are measured using a vector network analyzer. The material parameters are then found by equating the measured S-parameters to those determined theoretically using a mode-matching technique. The theoretical details are outlined and the extraction process is described. A stacked dielectric cube is characterized experimentally to demonstrate the feasibility of the approach, and results are compared to those obtained using a reduced-aperture waveguide technique.
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