Modelling of planar EBG structure by using equivalent circuit method

A novel method based on equivalent circuit is presented to model and analyze the EBG(Electromagnetic Band Gap) structure of power planes. The planar EBG structure is divided into cells and connecting parts, the equivalent circuit is developed by combining the integral equation multi-port networks and the micro-strip transmission lines. The stop bandgap of the EBG structure is obtained by the circuit simulation. The proposed method is validated by both measurement and full-wave simulation, where the proposed EBG structure shows the stop bandgap at 0.7-3 GHz with less than -50 dB insertion loss.