Wideband Coupling Modeling Analysis by Arbitrarily Incoming Source Fields Based on the Electromagnetic Topology Technique

It is very difficult to analyze electromagnetic (EM) responses of electrically large and complex objects because this requires a large amount of computing resources or extremely long calculation times. The EM topology (EMT) technique has been developed as a potential solution to overcome this resource-consuming limitation. The EMT technique can reduce computing resource by recombining EM analysis results of physically or electrically divided subblock models, instead of an entire model. However, the EMT technique still has some shortcomings to be overcome when applied to complex electrical systems subject to arbitrarily directional incoming sources. In this paper, we propose a wideband coupling analysis method by arbitrarily incoming sources based on the EMT technique for complex waveguide structures including a printed circuit board. A topological network is proposed that takes into account the effect on arbitrarily directional incoming sources with their polarization (vertical, horizontal, and circular). Explanations and definitions of several parameters for the proposed topological network are discussed. S-parameters are obtained using the CST-MWS tool. The analysis results of the proposed method, the entire model by the CST-MWS, and measurement results from a reference paper are compared, and the validity of the approach is verified.