Design of curvilinearly-structured EMC devices via a generalized nonstandard LOD-FDTD method

The precise design and reliable modeling of modern arbitrarily-curved EMC applications is presented in this paper via a nonstandard locally one-dimensional finite-difference time-domain algorithm. A principal attribute of the novel generalized technique is its frequency-dependent profile along with a fully curvilinear dual-mesh discretization process that identifies areas of smooth field variation and geometric details, not aligned with the grid axes. In this manner, the high-order unconditionally-stable method remains explicit with minimized dispersion errors even for large time-steps, thus allowing the consistent and fast study of several demanding cases. The prior formulation is successfully applied to the parametric analysis and fabrication of diverse setups, ranging from specialized EMC structures to prototype cylindrical cavities for non-destructive testing. Numerical simulations prove the overall efficiency, enhanced accuracy, and significant computational savings of the proposed technique.