Analysis of SAW filter fabricated on anisotropic substrate using finite-difference time-domain method

King Yuen Wong; Wai Yip Tam; Kevin J. Chen

doi:10.1109/ULTSYM.2006.37

Analysis of SAW filter fabricated on anisotropic substrate using finite-difference time-domain method

King Yuen Wong, Wai Yip Tam, Kevin J. Chen

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

2 Citations (Scopus)

Abstract

The finite-difference time-domain (FDTD) method is extended to analyze surface acoustic wave (SAW) filter fabricated on an anisotropic substrate. In this method, the partial derivatives of quasi-static Maxwell's equations and equation of motion are discretized to centered finite-differences. The spatial layout of the field components of this study differs from that of the isotropic case. The current two-dimensional spatial layout needs two components on particle velocity and electrical field nodes, three components on a stress node, in contrast to the isotropic case which requires one component on a particle velocity node, and one or two components on a stress node. Furthermore, the perfectly matched layer (PML) boundary condition is applied to reduce the spurious reflections. The proposed method is used to analyze the frequency response of a SAW filter fabricated on a Y-Z lithium tantalate (LiTaO3) substrate.

Original language	English
Title of host publication	2006 IEEE International Ultrasonics Symposium, IUS
Pages	96-99
Number of pages	4
Volume	1
DOIs	https://doi.org/10.1109/ULTSYM.2006.37
Publication status	Published - 1 Dec 2006
Event	2006 IEEE International Ultrasonics Symposium, IUS - Vancouver, BC, Canada Duration: 3 Oct 2006 → 6 Oct 2006

Conference

Conference	2006 IEEE International Ultrasonics Symposium, IUS
Country	Canada
City	Vancouver, BC
Period	3/10/06 → 6/10/06

Keywords

Anisotropic substrate
FDTD method
Surface acoustic wave filter

ASJC Scopus subject areas

Acoustics and Ultrasonics

More information

10.1109/ULTSYM.2006.37

Cite this

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title = "Analysis of SAW filter fabricated on anisotropic substrate using finite-difference time-domain method",

abstract = "The finite-difference time-domain (FDTD) method is extended to analyze surface acoustic wave (SAW) filter fabricated on an anisotropic substrate. In this method, the partial derivatives of quasi-static Maxwell's equations and equation of motion are discretized to centered finite-differences. The spatial layout of the field components of this study differs from that of the isotropic case. The current two-dimensional spatial layout needs two components on particle velocity and electrical field nodes, three components on a stress node, in contrast to the isotropic case which requires one component on a particle velocity node, and one or two components on a stress node. Furthermore, the perfectly matched layer (PML) boundary condition is applied to reduce the spurious reflections. The proposed method is used to analyze the frequency response of a SAW filter fabricated on a Y-Z lithium tantalate (LiTaO3) substrate.",

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Analysis of SAW filter fabricated on anisotropic substrate using finite-difference time-domain method. / Wong, King Yuen; Tam, Wai Yip; Chen, Kevin J.

2006 IEEE International Ultrasonics Symposium, IUS. Vol. 1 2006. p. 96-99 4151893.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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N2 - The finite-difference time-domain (FDTD) method is extended to analyze surface acoustic wave (SAW) filter fabricated on an anisotropic substrate. In this method, the partial derivatives of quasi-static Maxwell's equations and equation of motion are discretized to centered finite-differences. The spatial layout of the field components of this study differs from that of the isotropic case. The current two-dimensional spatial layout needs two components on particle velocity and electrical field nodes, three components on a stress node, in contrast to the isotropic case which requires one component on a particle velocity node, and one or two components on a stress node. Furthermore, the perfectly matched layer (PML) boundary condition is applied to reduce the spurious reflections. The proposed method is used to analyze the frequency response of a SAW filter fabricated on a Y-Z lithium tantalate (LiTaO3) substrate.

AB - The finite-difference time-domain (FDTD) method is extended to analyze surface acoustic wave (SAW) filter fabricated on an anisotropic substrate. In this method, the partial derivatives of quasi-static Maxwell's equations and equation of motion are discretized to centered finite-differences. The spatial layout of the field components of this study differs from that of the isotropic case. The current two-dimensional spatial layout needs two components on particle velocity and electrical field nodes, three components on a stress node, in contrast to the isotropic case which requires one component on a particle velocity node, and one or two components on a stress node. Furthermore, the perfectly matched layer (PML) boundary condition is applied to reduce the spurious reflections. The proposed method is used to analyze the frequency response of a SAW filter fabricated on a Y-Z lithium tantalate (LiTaO3) substrate.

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