Regularized Wiener–Hopf method in problems modelled by entire unknowns and exponential phase factors: the electromagnetic thick slot

This paper presents an effective method to deal with problems formulated in terms of Wiener-Hopf equations which contain entire unknowns and exponential phase factors. The methodology reduces the factorization problem to regularized integral equations. In particular, we validate the method analysing a practical application in electromagnetism: the scattering of a plane wave by a slot in a thick metallic screen.This article is part of the theme issue 'Analytically grounded full-wave methods for advances in computational electromagnetics'.