  In this paper we consider the direct scattering problem of obliquely incident
time-harmonic electromagnetic plane waves by an infinitely long dielectric
cylinder. We assume that the cylinder and the outer medium are homogeneous and
isotropic. From the symmetry of the problem, Maxwell's equations are reduced to
a system of two 2D Helmholtz equations in the cylinder and two 2D Helmholtz
equations in the exterior domain where the fields are coupled on the boundary.
We prove uniqueness and existence of this differential system by formulating an
equivalent system of integral equations using the direct method. We transform
this system into a Fredholm type system of boundary integral equations in a
Sobolev space setting. To handle the hypersingular operators we take advantage
of Maue's formula. Applying a collocation method we derive an efficient
numerical scheme and provide accurate numerical results using as test cases
transmission problems corresponding to analytic fields derived from fundamental
solutions.
