Title :
Analysis of overmoded waveguides using the finite-difference time domain method
Author :
Roper, D.H. ; Baird, J.M.
Author_Institution :
Dept. of Electr. Eng., Utah Univ., Salt Lake City, UT, USA
Abstract :
Presents techniques developed for analyzing scattering and coupling in overmoded waveguides using the finite-difference time-domain (FDTD) method. Sources and adsorbing boundary conditions for waveguide modes are examined. The stair-step approximation to round surfaces is considered, and a technique for finding the effective radius of a cylindrical model is described. A numerical example of scattering from a step diameter transition in circular waveguides is presented and compared to the analytic solution.<>
Keywords :
circular waveguides; electromagnetic wave scattering; finite difference time-domain analysis; waveguide theory; adsorbing boundary conditions; circular waveguides; coupling; cylindrical model; finite-difference time domain method; overmoded waveguides; round surfaces; scattering; stair-step approximation; step diameter transition; waveguide modes; Boundary conditions; Electromagnetic scattering; Electromagnetic waveguides; Finite difference methods; Lattices; Planar waveguides; Rectangular waveguides; Time domain analysis; Waveguide theory; Waveguide transitions;
Conference_Titel :
Microwave Symposium Digest, 1992., IEEE MTT-S International
Conference_Location :
Albuquerque, NM, USA
Print_ISBN :
0-7803-0611-2
DOI :
10.1109/MWSYM.1992.187997
