▎ 摘　　要

Plasmonic graphene-PEC structure is presented for THz frequency range in detailed analysis. The number of graphene layer effect on Surface Plasmon Polariton (SPP) wave behaviour is analyzed. Moreover, the graphene characteristics and propagation mode are presented. In the following, the proposed structure, graphene-PEC, analyzes in each electromagnetic field component in details. The numerical solver COMSOL Multiphysics is utilized to demonstrate that the graphene-PEC structure support quasi-TEM mode which classical approach is still true in THz band.