Multi-Layered Medium's General Green's Function Expression for Easily Calculating

New general expressions of spectral Green's functions for scalar and vector potentials of vertical and horizontal electric as well as magnetic dipoles in a multi layered medium are presented and verified theoretically. In addition to their simplicity, the quasi static images of these expressions can be extracted without any difficulty. It is the most important that the spatial Green's functions in representation of Sommerfeld integrals can be easily obtained by using discrete complex image theory. Some numerical results for different kinds of multi layered medium presented in the end are used to verify the correctness of the general expressions.