Investigation on EBG structures: A critical analysis to optimize the performance of asymmetric couple-line bandpass filter

EBGSs, Electromagnetic Band Gap Structures, have been developed into the most prominent framework by virtue of their superior efficacy, less intricacy in fabrication, and unified integration with the monolithic microwave integrated circuits (MMICs). In this letter, a certain number of advanced designs of EBGS are introduced and characterized with some rigorous parametric studies. This epistle regards the planar-EBG frameworks in the fashion of conventional uniform circular, square, and annular ring patterns. By the same token, optimum Filling Factor has been investigated by exclusively analysing the traditional frequency response of band pass filter from three imperative aspects such as: initial stop band analysis, pass band analysis, and conclusive stop band analysis. In like manner, the parametric comparison has been demonstrated in view of the initial frequency response, selectivity, 3dB cut-off frequency, 3dB pass bandwidth, insertion loss at 2nd harmonics, and the insertion loss at 3rd harmonics to figure out the optimum filling factor for certain planar-EBG patterns.