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

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 < 5%, with the corresponding reference values and empirically generated values.

Rigorous Analysis of a 26-GHz hybrid SIW coupler with Mode Matching Technique

“…For broadband high frequency applications, dimensions of the rectangular waveguide become too small and difficult to implement even with advanced fabrication techniques, therefore,Substrate Integra-ted Waveguide (SIW) technology has been introduced as a suitable way to implement structures such as in [2,8,7,9,14,10,11,12]. SIW structures have common advantages with printed circuits such as low cost, small size and planar integration.…”