Accurate and efficient evaluation of Green's functions for multilayer normally biased ferrite structures

This paper presents the closed form of the transmission matrix for a normally biased ferrite slab. Using this transmission matrix, Green's functions for multilayer ferrite structures can be numerically obtained in an accurate and efficient manner. The development of these Green's functions can be viewed in terms of simple analogous circuits. Green's functions obtained for several multilayer structures are compared to previously published results, and excellent agreement is achieved. As an application, the propagation constant for a single ferrite substrate is computed numerically using method of moments and compared to previously published results, and good agreement is achieved.