Numerical techniques for mixed high-low frequency EM-problems
We present numerical methods to be used for wave propagation problems were both relively short and and long wave lengths are present.Short and long wavelengths is referred to the characteristic sizes of the scales in the boundary conditions (BC) and material properties (MP). We propose that, depending on properties of the BC, one of three different Boundary Element Methods (BEM) are hybridised with a wave front, as opposed to a ray, implementation of Geometrical Theory of Diffraction (GTD). We will only consider the scattering problem in the presentation.
E-mail : stefanh@nada.kth.se