Numerical Modeling of Antennas with the Fast Hybrid FEBI-UTD Method

A. Tzoulis, T.F. Eibert

Antenna modeling with the hybrid FEBI-UTD tool is presented. In this powerful hybrid numerical method, the Finite Element Boundary Integral (FEBI) technique and the Multilevel Fast Multipole Method (MLFMM) are combined with the Uniform Geometrical Theory of Diffraction (UTD) giving full electromagnetic coupling between composite metallic/dielectric objects with arbitrary shapes and electrically large conducting objects within a common environment. Near-field computations are accelerated in the postprocessing stage with the MLFMM using combined near-field and far-field translations. Further, double diffracted high-frequency fields on pairs of straight metallic skewed edges are taken into account, formulated with the hard and soft scalar diffraction coefficients of UTD. Using this hybrid tool, the environment in antenna problems can be taken into account very efficiently by treating objects in the neighbourhood of antennas with UTD.