Fringing Field Effects in Edge-Guided Wave Circuits

The Getzinger´s model [1]for dielectric microstrip lines is extended to wide ferrite microstrips magnetized perpendicularly to the ground plane. In particular it is applied to the case of edge guided wave[2] propagation. For the first time a quantitative evaluation of the fringing field effects in edge guided wave MIC circuits is presented. Experimental results are presented which show that perfect magnetic wall boundary conditions, although appropriate to volume wave propagation in isotropic wide microstrips are not valid for edge guided wave propagation.