Numerical evaluation of the Green´s functions for cylindrical enclosures by a new spatial images method

A new and simple spatial images method has been implemented for the numerical calculation of the Green´s functions in circular cylindrical enclosures. The technique is based on the imposition of the boundary conditions for the potentials, using a spatial images arrangement. Results show that the numerical convergence of the novel technique is attained fast. They also demonstrate that the new Green´s functions lead to accurate results when analyzing real structures. The technique has been used for the efficient analysis of practical planar circuits shielded in circular cavities.