Title :
Absorbing and connecting boundary conditions for the TLM method
Author :
Zhizhang Ghen ; Ney, Michel M. ; Hoefer, Wolfgang J R
Author_Institution :
Dept. of Electr. Eng., Ottawa Univ., Ont., Canada
fDate :
11/1/1993 12:00:00 AM
Abstract :
Absorbing and connecting boundary conditions are implemented for the transmission-line matrix (TLM) method. The approach is based on an equivalence previously established between the finite-difference-time-domain (FD-TD) method and the TLM method. Boundary conditions presently used for the FD-TD algorithm can be transformed into conditions that can be interfaced with two-and three-dimensional (2D and 3D) TLM schemes. Additional conditions are introduced for 3D-TLM symmetrical condensed node simulations to suppress instabilities caused by spurious modes, inherent to the model, and which are amplified by absorbing boundaries. Numerical results and the comparison with other methods show the good performance of the proposed algorithms
Keywords :
boundary-value problems; electromagnetic field theory; matrix algebra; transmission line theory; 3D-TLM symmetrical condensed node simulations; FD-TD algorithm; TLM method; absorbing boundary conditions; connecting boundary conditions; finite-difference-time-domain; transmission-line matrix; Boundary conditions; Computational modeling; Electromagnetic scattering; Electromagnetic waveguides; Equations; Finite difference methods; Frequency; Joining processes; Transmission line matrix methods; Transmission lines;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
