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A Laguerre-FDTD Formulation for Frequency-Dependent Dispersive Materials

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2 Author(s)
Myunghyun Ha ; Interconnect and Packaging Center and School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA ; Madhavan Swaminathan

In this letter, Laguerre finite-difference time domain (FDTD) formulation for linear dispersive materials is proposed. Laguerre-FDTD is a time-domain method using Laguerre polynomials that ensures unconditional stability. Being free from Courant-Friedrich-Lewy (CFL) stability condition, Laguerre-FDTD is advantageous in the simulation of multiscale structures. The derived formulation has been implemented in 3-D and verified with a test structure containing frequency-dependent dispersive materials.

Published in:

IEEE Microwave and Wireless Components Letters  (Volume:21 ,  Issue: 5 )