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A procedure for calculating the characteristic modes series and parallel resonances calculation based on finite element method (FEM), in contrast to the established use of Method of Moment (MoM) is developed. A characteristic mode formulation based on electric currents yields only the series resonances of the analyzed structure. The direct calculation of the parallel resonances becomes feasible with...
Finite conductivity losses of arbitrarily shaped and inhomogeneously loaded two- and three-dimensional structures are evaluated to a practical accuracy, solving a linear eigenproblem formulated on perfect electric conductors (PECs). This scheme mimics the analytical approach classically employed for canonically shaped waveguides and cavities. The normal electric and tangential magnetic modal fields,...
Mode coupling phenomena on the finite substrate microstip lines are studied. The effect of the finite substrate is related to the general concept of mode coupling initially appeared on stub loaded leaky wave structures. The nonlinear nature of the analysis of open waveguides in general is addressed. Common misunderstandings on the use of HFSS™ regarding such an analysis are dicussed. Preliminary results...
A review of our research effort on the eigenanalysis of open-radiating and closed, straight as well as curved, also including sections of periodic structures is presented herein. The elaborated geometries are arbitrary shaped and loaded in general with inhomogeneous and/or anisotropic media. Our previous work was focused on two dimensional (2-D) waveguiding structures and particularly on open-radiating...
A study of reverberation chambers based on a three dimensional finite element eigenanalysis is elaborated. For this purpose the electric field vector wave equation is transformed into its weak form using the Galerkin procedure and discretized with the aid of tetrahedral edge elements. The resulting system of equations is then formulated into a generalized eigenproblem for a complex frequency (omega)...
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