EM scattering from multiple cylinders

In this paper we propose to extend the recently proposed iterative technique with extension to the T-matrix approach to the problem of electromagnetic scattering from a cluster of parallel dielectric circular cylinders. The overall treatment is separated into two stages: at the first stage, scattering from a single cylinder is obtained as the first-order solution; and at the second stage, a recursive process that accounts for multiple scattering, where the scattered field from one cylinder is considered as the illuminating wave for the other cylinder and vice verse, is formed. The procedure is found to converge very fast except for the case when any pair of cylinders is very close to each other. It should be noted that since no approximation is introduced in the procedure, this approach is thus more rigorous. Moreover, the formalism is general and can be readily applied to cylinders with cross section other than circular so long as the T matrix of each sub-cylinder can be accurately obtained. The validity of the proposed method has been verified by good agreement between model results and numerical simulations.