Analysis on radiation of antenna mounted on perfectly conducting convex surfaces by using NURBS‐UTD method

Abstract

This paper studies the use of NURBS‐UTD method in analyzing radiation of antenna set on perfectly conducting convex surfaces. The electromagnetic ray path is traced by numerical algorithm built from parametric domain in order to take advantage of the mapping definition for parametric surfaces. The presented algorithm can be applied to arbitrary shaped surfaces and provide accurate and stable geometrical parameters to calculation of electromagnetic fields afterwards. The algorithm is verified by cylinder on which analytical solution of ray path is available and good agreement is achieved by comparison. Radiation patterns of antennas mounted on arbitrary shaped surfaces are calculated and compared to commercial software to testify the accuracy and ability of the presented method. Evaluated by RMS error, the deviation between the presented method and commercial software is about 1 dB.

Application of UTD method to predict the electromagnetic characteristics in urban environments

“…In Reference 7, the multilevel fast multipole method is combined with UTD to model two‐dimensional scattering problems including very large scatterers. In Reference 8, the radiation of antenna set on perfectly conducting convex surfaces is analyzed by UTD method based on non‐uniform rational b‐splines models. In Reference 9, a beam pattern analysis method for antenna array on a complex platform, which combines the active element pattern method of the receiving mode and hybrid GTD antenna current Green's function technique.…”