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An efficient formulation of a 1‐D modal PML for waveguide structures
Author(s) -
Jung KyungYoung,
Kim Hyeongdong
Publication year - 1999
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19990405)21:1<48::aid-mop14>3.0.co;2-g
Subject(s) - modal , microwave , perfectly matched layer , modal analysis , waveguide , optics , physics , conductivity , electronic engineering , materials science , engineering , mathematics , acoustics , finite difference time domain method , telecommunications , quantum mechanics , composite material , vibration
A modified perfectly matched layer (PML) for hollow waveguides is proposed. In this formulation, a three‐step method based on auxiliary differential equations is used to consider the variation of conductivity profile. Numerical tests show that the proposed one‐dimensional (1‐D) modal PML offers good absorbing performance with typical thickness (e.g., 16‐cell layers). For the analysis of waveguide problems, computational savings can be achieved when the proposed 1‐D modal PML is applied to the propagating modes together with the short‐circuit condition for the evanescent modes. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 21: 48–51, 1999.