Performance investigation of a uni-planar compact electromagnetic bandgap (UC-EBG) structure for wide bandgap characteristics

A simple uni-planar EBG structure with reduced cell size is proposed for lower frequency band operation. The simulations of the design are performed using finite element method. Directive transmission method is applied to compute the bandgap of the EBG. The compact EBG structure exhibits wide stopband with different type of substrate materials. From the reflection and transmission characteristics the maximum bandgap obtained is 2.57 GHz (56.8%) and the best mutual coupling reduction level is -90 dB. The planar design can be easily fabricate on regular PC board and suitable for wide range of compact applications.