Eigenmodes analysis in Drude-type dispersive EBG structures in frequency domain

Recently, remarkable progress has been made in the study of electromagnetic band gap (EBG) structures due to their various applications in optics, microwave, and antenna engineering [1]. The band structure of EBG structures has been researched for frequency-independent or non-dispersive materials. Lately, there is an intensive interest in the analysis of dispersive EBG structures for novel applications. Therefore, accuracy in modeling of the band structure of EBGs composed of dispersive materials is important to accurately analyze the wave propagation phenomena over a wide range of frequencies in microwave and optical fields.