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

Volume

41

Issue

11

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

2016

Lastpage

2024

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;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.273429

Filename

273429