Application of the Characteristic Basis Function Method (CBFM) on a non-uniform mesh to the solution of large-size dielectric scattering problems

The extended version of the Characteristic Basis Function Method (CBFM-E) is applied to the problem of electromagnetic scattering in a forested area. A non-uniform mesh is used to discretize the forest elements, to avoid over-discretization of the electromagnetic problem and thereby to reduce the burden on the associated computing time and memory resources. The results obtained with a fine uniform mesh are included to validate those derived with the non-uniform mesh, adapted to the dielectric properties of the trees. The new approach based on nonuniform meshing, presented herein, improves the performance of the CBFM without compromising its accuracy.