Electromagnetic Analysis of Microstrip Hybrid Circuits Using Thin-Wire EFIE Formulation

Abstract

This work presents a computationally efficient approach for the numerical analysis of the integro-differential formulation that models electromagnetic radiation by thin microstrip structures, including the contribution of lumped elements. This proposal is based on the thin-wire approximation to reduce a surface current distribution to a filamentary electric current thus, reducing a tridimensional problem to a unidimensional formulation. In addition, the effects of the dielectric are taken into account by considering the effective electric permittivity and the multipole Debye model that does this correction over the analyzed frequency band. Finally, the results obtained with this proposed technique are compared with measurements and simulation in commercial software, and an error lower than 1.5% was verified for all the analyzed cases with a processing time approximately eight times lower when compared with a full-wave simulation.