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Method for optimising the performance of PML in anchor-loss limited model via COMSOL

Method for optimising the performance of PML in anchor-loss limited model via COMSOL
Method for optimising the performance of PML in anchor-loss limited model via COMSOL
Perfectly matched layer has been used for solving anchor-loss limited quality factor in the Micro electromechanical systems. However, setting up a well-behaved perfectly matched layer requires users to change the parameters of a perfectly matched layer to give correct results, while the current existing methods for choosing the right parameters are vague and lack theoretical support. Based on the mathematical theory of perfectly matched layer and simulation results of a beam structure's quality factor, this paper proposes a method for choosing the parameter to optimise the performance of perfectly matched layer in COMSOL. The accuracy of the proposed method is proved by matching the effect of substrate height on beam's quality factor with theory prediction. The author also studies the effect of beam height and beam width on the quality factor of the beam. The results demonstrate that simulated quality factors are in agreement with analytical values when the ratio of height over length is small but will show great divergence when height equals the length. This trend can be observed for the beam width as well. Especially for larger ratio of beam width over beam length, instead of decreasing monotonously as analytical equitation would expect, the simulated quality factor will converge into a stable value of 1700, which matches the result of two-dimensional model for the same beam structure. This means that a three-dimensional model has to be used for estimating the quality factor of a beam structure.
1751-8830
327-336
Li, Peng
02f3a864-8335-4976-b9ff-d40f7fcb3f63
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
Li, Peng
02f3a864-8335-4976-b9ff-d40f7fcb3f63
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828

Li, Peng, Ou, Jun-Yu and Yan, Jize (2022) Method for optimising the performance of PML in anchor-loss limited model via COMSOL. IET Science, Measurement & Technology, 16 (6), 327-336. (doi:10.1049/smt2.12107).

Record type: Article

Abstract

Perfectly matched layer has been used for solving anchor-loss limited quality factor in the Micro electromechanical systems. However, setting up a well-behaved perfectly matched layer requires users to change the parameters of a perfectly matched layer to give correct results, while the current existing methods for choosing the right parameters are vague and lack theoretical support. Based on the mathematical theory of perfectly matched layer and simulation results of a beam structure's quality factor, this paper proposes a method for choosing the parameter to optimise the performance of perfectly matched layer in COMSOL. The accuracy of the proposed method is proved by matching the effect of substrate height on beam's quality factor with theory prediction. The author also studies the effect of beam height and beam width on the quality factor of the beam. The results demonstrate that simulated quality factors are in agreement with analytical values when the ratio of height over length is small but will show great divergence when height equals the length. This trend can be observed for the beam width as well. Especially for larger ratio of beam width over beam length, instead of decreasing monotonously as analytical equitation would expect, the simulated quality factor will converge into a stable value of 1700, which matches the result of two-dimensional model for the same beam structure. This means that a three-dimensional model has to be used for estimating the quality factor of a beam structure.

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Accepted/In Press date: 2 May 2022
e-pub ahead of print date: 23 May 2022
Published date: 24 May 2022
Additional Information: Funding Information: The author would like to acknowledge Mr Shengqi Yin for the valuable opinions during the writing of this paper and Mr Chuang Sun for the helpful discussion about mechanical engineering. The author would also like to acknowledge the use of the IRIDIS High Performance Computing Facility, and associated support services at the University of Southampton, in the completion of this work. Publisher Copyright: © 2022 The Authors. IET Science, Measurement & Technology published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.

Identifiers

Local EPrints ID: 457717
URI: http://eprints.soton.ac.uk/id/eprint/457717
ISSN: 1751-8830
PURE UUID: fb2e5b79-bb04-4660-a5f6-7fbed5f9a38b
ORCID for Peng Li: ORCID iD orcid.org/0000-0003-1828-9597
ORCID for Jun-Yu Ou: ORCID iD orcid.org/0000-0001-8028-6130
ORCID for Jize Yan: ORCID iD orcid.org/0000-0002-2886-2847

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Date deposited: 16 Jun 2022 00:23
Last modified: 02 Aug 2022 01:52

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Contributors

Author: Peng Li ORCID iD
Author: Jun-Yu Ou ORCID iD
Author: Jize Yan ORCID iD

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