Rapid analysis of electrically large radome

In this paper, the aperture integration-surface integration (AI-SI) method is adopted to analyze the electrically large radome. The fast multipole method (FMM) is employed to accelerate the calculation of the second radiation fields from the reflected currents on the inner surface of the radome. The radiation pattern of the antenna-radome system determined with the present method has good agreement with the pattern of the direct integral method; however, the computational time of the fast multipole method is reduced significantly.