A HYBRID TREFFTZ FINITE ELEMENT ANALYSIS OF SYMMETRIC OR ANTISYMMETRIC EIGENMODES PROPAGATING IN AN ELECTROMAGNETIC WAVEGUIDE

We presented a hybrid Trefftz finite element (HTFE) formulation for symmetric or antisymmetriceigenmode analysis of electromagnetic waveguides with symmetric cross sections.After the conventional scheme, we compute a functional of the quarter sectiondivided by vector elements, and ring and disc sections divided by Trefftz elements. Numericalresults of a holey fiber confirm utility and validity of the formulation by comparingwith results of the HTFE method without symmetric conditions, the finite elementmethod, and the multipole method