Title :
Cut-off and phase constants of partially filled axially magnetized, gyromagnetic waveguides using finite elements
Author :
Dillon, Bernice M. ; Gibson, Andrew A P ; Webb, Jon P.
Author_Institution :
Dept. of Electr. Eng. & Electron., Univ. of Manchester Inst. of Sci. & Technol., UK
fDate :
5/1/1993 12:00:00 AM
Abstract :
A three-component vector finite-element formulation for modeling the propagation characteristics of partially filled, axially magnetized, gyromagnetic waveguides is described. Covariant-projection elements have been used to avoid spurious modes, and periodic boundary conditions have been implemented to improve numerical efficiency. The classic quadratic functional derived from the vector, curlcurl, magnetic field equation is suited to evaluating the cut-off planes of gyrotropic waveguides. A known field transformation is used to reformulate the functional in a form convenient for calculating phase constants. Cut-off and phase constant solutions are presented for both fully and partially filled, longitudinally magnetized, ferrite-loaded waveguides
Keywords :
boundary-value problems; dielectric-loaded waveguides; ferrite applications; waveguide theory; axially magnetized; covariant projection elements; curlcurl magnetic field equation; cutoff calculation; ferrite-loaded waveguides; field transformation; finite-element formulation; gyromagnetic waveguides; longitudinally magnetized; modeling; partially filled; periodic boundary conditions; phase constants; propagation characteristics; three-component vector FEA; Boundary conditions; Equations; Ferrites; Finite element methods; Geometry; Gyromagnetism; Magnetic analysis; Magnetic fields; Magnetic separation; Waveguide components;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
