Second-order absorbing boundary conditions for the FD-TLM method analysis of open-region scattering problems

Jing Meng, Ram Mohan Narayanan, Robert H. Voelker

Research output: Contribution to journalConference article


This paper extends the utility of the finite-difference transmission-line-matrix (FD-TLM) method for solving open region scattering problems in remote sensing applications, by developing and evaluating second-order absorbing boundary conditions (ABCs) for the method. The ABCs for the edges and corners are obtained by associating sets of approximate PDEs corresponding to the boundaries. The finite-difference time-domain expressions for the ABCs are derived by using a two-level discretization scheme which is proved to be stable. It can be seen from the plots obtained that the implemented second-order absorbing boundaries are perfectly transparent to the waves impinging on them at incidence angles of 0-45°. Also, the normal incidence reflection coefficient is less than -35 dB for time step n up to 54, at which the global error is less than 10 -5 .

Original languageEnglish (US)
Pages (from-to)1136-1139
Number of pages4
JournalIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
StatePublished - Dec 1 1994
EventProceedings of the IEEE Antennas and Propagation International Symposium. Part 3 (of 3) - Seattle, WA, USA
Duration: Jun 19 1994Jun 24 1994


All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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