Analysis of electrically large 2D objects via spatial decomposition and reduced current fidelity

We present an integral equation (IE) method for the analysis of electrically large objects which involves the use of the spatial decomposition technique (SDT) and a scheme which we refer to as reduced current fidelity (RCF). We apply SDT/RCF to the analysis of perfectly conducting 2D structures under TM excitation. In the SDT an electrically large structure is decomposed into a set of much smaller subobjects and IE methods are used to determine a solution for each subobject with an account made for the presence of the other subobjects. The method of moments (MoM) is applied for the numerical solution of each subobject in a sequential manner until a solution for every object created from the decomposition is obtained. For electrically large objects, RCF allows for a significant reduction in the solution time and memory in an SDT solution by exploiting the large distance between subobjects.