A vector generalized finite element-Boundary Integral formulation for scattering from cavity-backed apertures

In this paper, we have developed a hybrid VGFEM-BI formulation for the analysis of scattering from filled cavities. Since surface basis functions are not supported in the framework of VGFEM, volumetric vector basis functions are forced to impose boundary conditions at the aperture. This is achieved by constructing conformal PU domains from the geometry mesh. The method has been validated by comparing the simulated radar cross sections of filled cavities against measurement and FEM-BI data. Our current research is on the application of the method for large scattering and radiation problems using tailored basis functions, and these results will be presented at the conference.