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 proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)


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 languageEnglish
Title of host publication2006 IEEE International Ultrasonics Symposium, IUS
Number of pages4
Publication statusPublished - 1 Dec 2006
Event2006 IEEE International Ultrasonics Symposium, IUS - Vancouver, BC, Canada
Duration: 3 Oct 20066 Oct 2006


Conference2006 IEEE International Ultrasonics Symposium, IUS
CityVancouver, BC


  • Anisotropic substrate
  • FDTD method
  • Surface acoustic wave filter

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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