A FINITE-ELEMENT ANALYSIS ON ELECTROMAGNETIC-WAVES IN RECTANGULAR DIELECTRIC CHIROWAVEGUIDE

A finite element algorithm on eigenvalue problem of the dielectric wav eguide with chiral material is presented. The chiral material is defin ed by the constitution relations which make the electromagnetic coupli ng between the electric and magnetic fields by means of the chirality admittance. The chiral material has potential applications in the area s of infrared and mm-wave band. For different chirality admittance, th e computation is developed for different structure of waveguides which are difficult for analytical calculation. From the eigenvalues and th e eigenvectors, the dispersion curves, the modes and the field pattern s are obtained. The maximum value of dispersion curves is obvious grea ter than that without chiral material. The main points of the results of finite element calculation are consistent with those of analytical approach.