Analysis of the frequency response of SAW filters using finite-difference time-domain method

King Yuen Wong, Wai Yip Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

Abstract

The finite-difference time-domain (FDTD) technique was extended to analyze the frequency response of surface acoustic wave (SAW) filters. In this method, the partial derivatives of quasi-static Maxwell's equations and the equation of motion are discretized to centered finite differences. In addition, the perfectly matched layer boundary condition was applied to reduce spurious reflections. Two structures are considered in this paper. First, the model was applied to analyze the influence of the number of electrodes on the frequency response of a SAW filter fabricated on a zinc oxide (ZnO) substrate. Then, the proposed method was further extended to analyze the frequency response of a ZnO/diamond/Si-layered SAW filter. The simulated results are in a good agreement with the existing experimental data, indicating that the FDTD method was an appropriate approach for modeling SAW devices.
Original languageEnglish
Pages (from-to)3364-3370
Number of pages7
JournalIEEE Transactions on Microwave Theory and Techniques
Volume53
Issue number11
DOIs
Publication statusPublished - 1 Nov 2005

Keywords

  • Finite-difference time-domain (FDTD) methods
  • Frequency response
  • Surface acoustic wave (SAW) filters

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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