Finite-element based techniques for the modeling of PBG materials

In this paper we focus on the development of efficient Finite-Element based numerical techniques for the modeling of PEG materials. For infinite perio dic materials, we present a combined Finite Element-Integral Equation Metho d (FE-IEM). Using FE-IEM, we can analyze both the frequency response of PEG materials under plane wa,ve incidence and the bandgap structure of the PEG material itself. We also present the general formulation for the Finite El ement-Absorbing Boundary Condition (FE-ABC) analysis of planar circuits and antennas printed on laterally Finite PEG (FPBG) materials. Numerical examp les are given to demonstrate a few applications.