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A simple and efficient implementation of CFS-PML in the FDTD analysis of periodic structures

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2 Author(s)
Correia, D. ; Center for Comput. Electromagn., Univ. of Illinois, Urbana, IL, USA ; Jian-Ming Jin

The use of perfectly matched layers (PMLs) is one of the most popular techniques employed for mesh truncation in finite-difference time-domain (FDTD) simulations. Its original form, however, has a poor absorption of evanescent waves, which are highly present in simulations of periodic structures. A better absorption has been achieved using a complex frequency shifted (CFS) PML, which has been implemented via a convolution scheme. In this letter, we present a simple and efficient implementation of the CFS PML and apply it to periodic structures.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:15 ,  Issue: 7 )