Title :
Analysis of irregularities in a planar dielectric waveguide
Author :
Chung, Shyh-Jong ; Chen, Chun Hsiung
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
9/1/1988 12:00:00 AM
Abstract :
A numerical method based on the partial variational principle (PVP) is proposed to solve discontinuity problems due to arbitrary irregularities in a planar dielectric waveguide. A variational equation is established and solved by the finite-element method along with the Green´s-function technique. The integral variable of the Green´s-function is changed so that numerical calculations can easily be performed. Because of the accuracy of the present method, the radiation fields can be obtained with no difficulty. Several numerical results, including the reflection and transmission coefficients as well as the radiation losses and patterns, are calculated and compared
Keywords :
Green´s function methods; dielectric waveguides; finite element analysis; variational techniques; waveguide theory; Green´s-function technique; discontinuity problems; finite-element method; integral variable; irregularities; numerical method; partial variational principle; planar dielectric waveguide; radiation fields; radiation losses; radiation patterns; reflection coefficients; transmission coefficients; Dielectrics; Distributed feedback devices; Finite element methods; Gratings; Least squares approximation; Optical waveguides; Planar waveguides; Waveguide components; Waveguide discontinuities; Waveguide junctions;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
