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IEEE Microwave and Guided Wave Letters
Volume 10 Number 4, April 2000

Table of Contents for this issue

Complete paper in PDF format

An Artificially-Synthesized Absorbing Medium for the Truncation of FDTD Lattices

Wenhua Yu, Senior Member, IEEE Douglas H. Werner, Senior Member, IEEE and Raj Mittra Life Fellow, IEEE

Page 128.

Abstract:

An artificially-synthesized absorbing material composed of a doubly-periodic array of lossy electric and magnetic media (i.e., an and µ checkerboard) is presented for the truncation of Finite-Difference Time-Domain (FDTD) lattices in waveguide simulations. It is shown numerically that this artificially-synthesized material exhibits excellent absorption properties when used in waveguide simulations. However, unlike the Perfectly Matched Layer (PML) absorbing medium, the artificially-synthesized medium presented in this letter does not require any modification of the standard FDTD formulation. Numerical examples demonstrate that the FDTD implementation of the artificially-synthesized absorbing medium is stable as well as computationally efficient.

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