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.