T. Tischler, W. Heinrich

Published in:

IEEE Trans. Microwave Theory Tech., vol. 48, no. 12, pp. 2249-2253 (2000).

Abstract:

Using a perfectly matched layer (PML) as lateral boundary in waveguide analysis introduces artificial modes and other unexpected effects. This paper presents results of a finite-difference frequency-domain approach and an analytical investigation of the PML's capability to simulate the lateral open space, including an accuracy estimation. A criterium how to detect the desired modes out of the mode spectrum is also given. The findings are verified for a coplanar waveguide radiating into the substrate.

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