Extending PML absorbing boundary condition to truncate microstrip line in nonuniform 3-D FDTD grid

Document Type

Article

Publication Date

12-1-1999

Abstract

The Berenger's perfectly matched layer (PML) absorbing boundary condition is applied to terminate a microstrip line with metal strip and multilayer dielectric media extending into the PML regions. In order to handle the inhomogeneous properties of the PML layers better, the integral form of the Maxwell's equations, approximated by central-difference expressions instead of exponential-difference expressions, are utilized to deduce the finite-difference time-domain (FDTD) equations for updating field components inside PML media. The derived formulas are proven to be flexible and convenient for generating and handling the PML layers in a nonuniform FDTD grid. Simulation result shows that the proposed multilayer PML boundary condition can effectively absorb the outgoing wave with at least -80-dB reflection coefficient under a complicated boundary situation. © 1999 IEEE.

Identifier

0033359913 (Scopus)

Publication Title

IEEE Transactions on Microwave Theory and Techniques

External Full Text Location

https://doi.org/10.1109/22.788511

ISSN

00189480

First Page

1771

Last Page

1776

Issue

9 PART 2

Volume

47

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