An efficient approach to the local optimization of finite electromagnetic band-gap structures

Authors : David DUQUE, Vito LANCELLOTTI, Bastiaan Pieter DE HON, Antonius TIJHUIS

Pages : 546-561

Doi:10.3906/elk-1208-51

View : 16 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :We propose a methodology based on linear embedding via Green`s operators insert ignore into journalissuearticles values(LEGO); and the eigencurrent expansion method insert ignore into journalissuearticles values(EEM); to efficiently deal with and locally optimize 2-D electrically large electromagnetic band-gap insert ignore into journalissuearticles values(EBG); structures. In LEGO terminology, the composite EBG structure is broken up insert ignore into journalissuearticles values(diakopted); into constitutive elements called ``bricks`` that we characterize through scattering operators by invoking Love`s equivalence principle, while, at the same time, the electromagnetic interaction among the bricks is captured by transfer operators. The resulting electromagnetic problem is then succinctly formulated through an integral equation involving the total inverse scattering operator S-1 of the structure. To perform local optimization, the formulation of the problem allows for variations of the electromagnetic properties and the shape of a set of objects in the EBG structure with respect to those of the others, thereby allowing us to tune a compact designated domain within a large one. Finally, the method of moments and the EEM are applied to achieve a considerable reduction in memory use for the overall problem.
Keywords : Computational electromagnetics, method of moments, linear embedding via Green`s operators, eigencurrent expansion method, integral equations