Análise teórica de filtros em estruturas EBG e em guias de ondas de cristais fotônicos

Abstract

This paper presents simulations of a band-stop filter using microwave Electromagnetic Bandgap structures (EBG). In the filter structure are made holes in the ground plane and these holes will subsequently changed its diameter to improve the rejection band of the quality and obtaining two rejection bands. Compared with conventional filters, filters with EBG structures have better rejection bandwidth characteristics in the microwave band. These simulations were performed with commercial software ANSYS HFSS. A filter structure using photonic waveguides is also modeled and simulated using commercial software Comsol. The effects of the physical parameters of the structure in relation to the filter characteristic are studied in both filters. The results of the creation and simulation procedure are described and possible applications of these filter structures are discussed in this paper. The particularly wide stopband is achieved by the circuits presented in this paper as well as two rejection bands.