Finite-Element Solution of Periodic Waveguides for Acoustic Waves
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This paper presents a meta-anatomy of the response of the immune system to various types of attacks, and some of the mechanisms used to attack these immune systems have been described.Abstract:
Rights © 1987 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.” IEEE, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1987, Volume: 34, Issue: 4, page(s): 472477 Type article File Information ITUFFC34-4.pdfread more
Citations
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Finite element simulations of thin-film composite BAW resonators
TL;DR: The results show that useful information on the performance of the thin-film resonators can be obtained even with relatively coarse meshes and, consequently, moderate computational resources.
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Finite-element simulation of wave propagation in periodic piezoelectric SAW structures
M. Hofer,N. Finger,Guenter Kovacs,Joachim Schöberl,Sabine Zaglmayr,Ulrich Langer,Reinhard Lerch +6 more
TL;DR: Two newly developed PBC algorithms are developed that deliver the same results but have totally different numerical properties and, therefore, allow the use of problem-adapted solvers.
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Propagation characteristics of longitudinal leaky SAW in Al-grating structure
TL;DR: New orientations for longitudinal leaky SAW with small propagation losses and high velocities in lithium niobate (LN) and lithium tantalate (LT) have been found by using a simulator that combined both finite-element and analytical methods.
Journal ArticleDOI
Efficient analysis tool for coupled-SAW-resonator filters
TL;DR: The advantages of the coupled-mode (COM) formalism and the transmission-matrix approach are combined in order to create exact and computationally efficient analysis and synthesis tools for the design of coupled surface acoustic wave resonator filters.
Proceedings ArticleDOI
Analysis of periodic structures for BAW and SAW resonators
TL;DR: In this article, a finite element periodic analysis of BAW and SAW resonators is presented, and the boundary conditions and finite element meshing of a periodic structure are presented, compared with the actual resonators or the results of the full analysis which include the frequency-temperature behavior, mode shapes and frequency spectra.
References
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A method for analyzing waves in structures consisting of metal strips on dispersive media
TL;DR: In this paper, a method for analysis of wave propagation on structures consisting of periodic metal strips is presented, which is an extension of earlier theories based on Legendre polynomial expansions of the electric field.
Journal ArticleDOI
Horizontal shear surface waves on corrugated surfaces
B.A. Auld,J.J. Gagnepain +1 more
TL;DR: In this paper, experiments have been performed on horizontal shear surface-wave propagation along a corrugated surface and the results are in agreement with approximate theories used in analogous electromagnetic problems.
Journal ArticleDOI
The Influence of Stored Energy at Step Discontinuities on the Behavior of Surface-Wave Gratings
R.C.M. Li,J. Melngailis +1 more
TL;DR: In this paper, an improved equivalent network, in which this stored energy is represented as a simple shunt susceptence, is presented for a Rayleigh wave normally incident on a step discontinuity on the substrate surface.
Journal ArticleDOI
Finite-Element Analysis of Lamb Wave Scattering in an Elastic Plate Waveguide
M. Koshiba,S. Karakida,M. Suzuki +2 more
TL;DR: In this paper, a method for the solution of the fundamental symmetric Lamb wave in an elastic plate waveguide is described, which is a combination of the finite element and the analytical method.
Journal ArticleDOI
Acoustic surface waves in piezoelectric materials with periodic metal strips on the surface
TL;DR: In this paper, the dispersion relations for acoustic surface waves in piezoelectrics with periodic metal strips applied to the surface are investigated, and the general results are applied to discuss devices such as multistrip directional couplers and strip-coupled amplifiers.
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