Broadband antenna response using hybrid technique combining frequency domain MoM and FDTD

A novel hybrid technique for broadband antenna and scatterer analysis is proposed. The technique uses a hybridisation method linking the frequency domain method of moments (MoM) and the finite difference time domain (FDTD) method. The coupling of these methods is achieved by using the equivalence principle, applied over the intervening surface. A great reduction in computational time is achieved in the MoM domain by using an impedance interpolation technique. The Gaussian pulse (GP) and derivative Gaussian pulse (DGP) are investigated as the excitation sources for the MoM. Examples are given and the results were found to be in good agreement with alternative methods.