Novel substrate integrated waveguide cavity-based unified multiband permittivity and permeability estimation approach

Nilesh K. Tiwari, S. P. Singh and M. Jaleel Akhtar

Journal of Electromagnetic Waves and Applications, 2020, vol. 34, issue 18, 2499-2513

Abstract: A novel approach of multiband real permittivity and permeability estimation of the magnetic composites using a modified under coupled multimodal (TE10p) substrate integrated waveguide (SIW) cavity is presented. The proposed schemes allow the accurate wideband microwave characterization of the magneto-dielectric composites by using the higher-order modes of the designed SIW cavity. The analytical closed-form modified formulation is developed to calculate the permittivity and permeability over the wide frequency range, 10–20 GHz. Consequently, a unified empirical formulation is also developed, which can be used to generate the approximate prior values of multimodal permittivity and permeability for the synthesized magnetic composites, which is usually not known in advance. The proposed analytical and empirical approaches are validated numerically and experimentally, corresponding to various test samples. The estimated parameters using the proposed analytical approach are found to be in quite close agreement, error

Date: 2020
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DOI: 10.1080/09205071.2020.1825995

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