Title :
Combining modal analysis and the FD-TD method in the study of dielectric waveguide junction problems
Author :
Chu, S.T. ; Chaudhuri, S.K.
Author_Institution :
Dept. of Electr. Eng., Waterloo Univ., Ont., Canada
Abstract :
A technique is presented to extract the modal parameters from the FDTD (finite-difference time-domain) results in the analysis of waveguide junction problems. Using this approach, it is possible to extract the modal amplitudes of the guided modes from the FDTD field distribution. These modes can be separated from the radiated and the evanescent modes, so that the scattering at these junctions can be studied more easily. The propagation constant extracted from the scattering in a dielectric slab junction shows good agreement with the exact value.<>
Keywords :
dielectric waveguides; difference equations; electromagnetic wave scattering; guided electromagnetic wave propagation; time-domain analysis; waveguide couplers; waveguide theory; EM wave scattering; dielectric slab junction; dielectric waveguide junction problems; evanescent modes; field distribution; finite-difference time-domain results; guided modes; modal analysis; propagation constant; radiated modes; Dielectrics; Equations; Finite difference methods; Modal analysis; Optical scattering; Optical waveguides; Tellurium; Time domain analysis; Waveguide discontinuities; Waveguide junctions;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1989. AP-S. Digest
Conference_Location :
San Jose, CA, USA
DOI :
10.1109/APS.1989.134932
