New Ferrite-Filled Waveguiding Structures Analysed by the Averaging Method

摘要

Waves in some sophisticated waveguiding structures, filled with magnetized ferrite, are investigated. Anisotropic boundary conditions are supposed to be valid on some of the walls of the waveguides, whence the results allow, for instance, an analysis of ferrite-filled corrugated waveguides and microstrip lines with corrugated strips. The results can be used in developing different devices, such as controlled phase-shifters and isolators. For solving the related electromagnetic problems, a new approximate technique - averaging method - is used. The main idea is to average field inside a waveguide assuming that the tangential components are locally quasi-static. The present technique can be used when one of the transversal dimensions of a waveguide is much smaller than the wavelength in that direction.