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Integral equations via saddle point problem for 2D electromagnetic problems. (English) Zbl 0964.78005
The authors derive a new integral equation system for two-dimensional scattering problems. This is deduced from first principles and also by means of minimization of a quadratic functional. An asymptotic analysis is carried out, and algorithms are suggested for numerical work. The methods discussed are used to evaluate the Radar Cross Section of a number of bodies. The agreement is satisfactory when an exact value is available, and it is suggested that the method may be useful for a target covered by a thin dielectric layer. A method for dealing with the awkward case of a quasi-cavity system is suggested.

78A45 Diffraction, scattering
45F15 Systems of singular linear integral equations
78M35 Asymptotic analysis in optics and electromagnetic theory
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