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A broadband measurement method is presented to evaluate the complex permittivity of a deformed sample. Theoretical basis of the method is the hybrid electromagnetic field analysis, i.e, the extended spectral domain approach combined with mode-matching method (ESDMM). The sample is required to have the rotational symmetry but may have the deformation and/or air gap between the sample and the conductor...
In this paper, the first high order leaky mode of slotted coaxial lines by spectral-domain approach is analyzed. In theory, that slotted coaxial lines can also support space-wave leaky modes, like those leaky modes exist in conductor-backed slotlines, and the substrate thickness plays an important role in design.leakage modes. The leaky slotted coaxial lines integrate the transmission line and the...
An effective evaluation method of complex permittivity in wide microwave frequency range is proposed by using rigorous calculation on partially filled materials in coaxial line. Electromagnetic field analysis for the evaluation is based on extended spectral domain approach combined with mode-matching method (ESDMM). ESDMM is accurate and more efficient than FEM, and suitable for the iterative fitting...
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