Inclusion of finite substrate effects in the analysis of printed antennas and MICs by the CGF technique

In MICs and printed antennas the dielectric substrates always have a finite extent. Rigorous analysis of the truncation affects requires the solution of an integral equation with the MoM. This is usually numerically intense especially for 3-D structures. The truncation effects are incorporated directly in an approximate Green's function. The characteristic Green's function (CGF) technique is combined with the complex images method to derive the Green's function. The derived Green's function exhibits excellent agreement with the available rigorous MoM solution of the problem.