Title :
Study of absorbing boundary conditions in the 3D-TLM symmetrical condensed node model
Author :
Chen, Z. ; Ney, M.M. ; Hoefer, W.J.R.
Author_Institution :
Dept. of Electr. Eng., Ottawa Univ., Ont., Canada
Abstract :
The TLM (transmission line matrix) method is a numerical technique based on temporal and spatial sampling of electromagnetic fields. As with the FD-TD (finite-difference time-domain) method, the absorbing boundary conditions are needed to truncate computational regions when open structures are simulated. The FD-TD absorbing boundary conditions have been adapted to and implemented in the 3D-TLM symmetrical condensed node model. It is demonstrated that instability may occur due to spurious modes of the 3D-TLM condensed node mesh.<>
Keywords :
finite element analysis; microwaves; numerical analysis; radiowave propagation; 3D-TLM symmetrical condensed node model; absorbing boundary conditions; condensed node mesh; electromagnetic fields; instability; numerical technique; spatial sampling; spurious modes; temporal sampling; transmission line matrix; Boundary conditions; Computational modeling; Electromagnetic fields; Electromagnetic scattering; Extrapolation; Finite difference methods; Sampling methods; Student members; Taylor series; Transmission line matrix methods;
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.1992.187989
