Accelerant method for Green's function of horizontal dipole in parallel plate waveguide

An accelerant method is proposed to calculate Green's function for a horizontal dipole in a parallel plate waveguide. The expression in the spatial domain is simple and easily coded. It is advantageous in a wide frequency range and for a larger ratio of distance over height. For a small ratio of distance over height, the computing efficiency is comparable with the complex image method without the need for complex mathematical pretreatment.