Analysis of Nonreciprocal Coupled Image Lines

The effective dielectric constant method is used to analyze the nonreciprocal coupling properties of coupled image lines separated by a Iongitudinally magnetized ferrite slab. Two structures are considered, one incorporating low-dielectric-constant image lines (epsilon_r = 2.56), the other incorporating image lines consisting of high-dielectric-constant material (epsilon_r = 9.8). Results of dispersion characteristics, coupling parameters, and field distributions are presented.