Electromagnetic distributions demonstrating asymmetry using a spectral-domain dyadic Green´s function for ferrite microstrip guided-wave structures

An anisotropic dyadic Green´s function is used in a theoretical formulation for finding the behavior of the surface currents and electromagnetic fields of nonreciprocal structures. Dispersion diagrams, surface current, magnetic- and electric-field distributions, and Poynting-vector distributions are then found for microstrip structures containing a multilayered medium including a ferrite material layer. Such structures can variously be used as isolators, magnetostatic wave generators, or other devices relying upon nonreciprocal action. Calculations are done using a fast solver anisotropic Green´s function spectral-domain computer code. Asymmetry in the surface current, electric and magnetic fields, and Poynting-vector distributions is found, demonstrating explicitly the effect of the nonreciprocity of the ferrite layer.