Relate the GSTCs Method and ECM through Surface Impedance in Studying Periodic Structures

The surface electric and magnetic susceptibilities of typical periodic structures are derived based on simulated transmission and reflection coefficients through the generalized sheet transition conditions (GSTCs). Based on these susceptibilities, the surface impedance is obtained and compared with the results obtained using the equivalent circuit method (ECM). Furthermore, the relation between inductors and susceptibility is obtained and analyzed.