Radiation From a Monopole Antenna Array on an Electrically Large Conducting Convex Surface

Asymptotic solutions based on the uniform geometrical theory of diffraction (UTD) are well developed and efficient for analyzing radiation, mutual coupling, and scattering associated with electrically large conducting convex surfaces. Relevant UTD solutions are available mostly for infinitesimal sources on or far away from the surface. Hence, UTD solutions have been extensively used to analyze radiation from conformal antennas and antenna arrays on an electrically large convex surface. In this letter, it is proposed to predict far and near field radiations from a monopole antenna array on an electrically large conducting convex surface as a nonconformal array. A UTD solution that allows sources to be on or slightly off the surface is employed after identifying ray paths. UTD results are validated with those of the multilevel fast multipole method.