Efficient wideband analysis of electromagnetic scattering and radiation problems

In this paper, single point and two point asymptotic waveform evaluation (AWE) are outlined as the efficient techniques for obtaining broadband response of wire radiators/scatterers from the method-of-moments (MoM) samples generated for a few isolated frequencies. An adaptive scheme, based on two-point AWE technique, is suggested for optimal choice of the location of the expansion points. Sample numerical results for two practical structures are given. The approach presented in the paper gives good accuracy and speed-up ratio for wideband analysis.