Analysis of uniplanar electromagnetic band-gap (EBG) structures by the MoM/BI-RME method

This paper presents a novel method for the characterization of uniplanar electromagnetic band-gap structures. Their characterization requires the calculation of the dispersion diagram of the guided modes and the phase of the reflection coefficient under plane-wave illumination. The reflection coefficient is determined by using the MoM/BI-RME method. The same method is adopted in conjunction with a new technique for the efficient calculation of the dispersion diagram. This technique is based on the tracking of the eigenvalue path in the complex plane, and proved more reliable than the method based on the searching of the determinant zeros. The method is applied to the analysis of the classical Uniplanar Compact Electromagnetic Band-Gap structure, and some results show the accuracy of the method, its efficiency, and its convergence properties.