Applications of conformal mappings to the diffraction of electromagnetic waves by a grating

The method previously proposed to investigate the diffraction of electromagnetic waves by gratings, in the case of an infinite conductivity is developed. This method, based on the properties of the analytic functions, allows the solution of theoretical problems and reduces the determination of the efficiencies to the study of differential systems. Some examples show its utility for numerical computation. Good agreement is observed in comparing with the results obtained from other techniques (integral equations).