A new wideband closed-form Green's function for a HED over microstrip structure

A new wideband closed-form Green's function for a HED (horizontal electric dipole) over microstrip geometry is presented. The closed-form is valid over wide range of frequencies, and has the potential application for the time domain analysis of multilayer media by combining it with the MoM. It significantly reduces the computational time, as one only needs to sum few terms instead of repeating the time-consuming Sommerfeld's integrals. It may also be noted that the present method can be easily extended to other kinds of sources and applied to general lossy multilayer media.