Journal ArticleDOI
Microsound Components, Circuits, and Applications
TLDR
In this article, the feasibility of acoustic analogs of conventional microwave transmission line (microsound) components on the surface of crystal and substrates is discussed and the current status of critical problems including the epitaxial growth of thin films and submicron etching procedures are given.Abstract:
Surface acoustic wave components have been realized which perform the functions of transduction, amplification, and coupling. Applications are suggested which make use of these components. Exploratory work in connection with surface acoustic waveguides suggests the feasibility of acoustic analogs of conventional microwave transmission line (microsound) components on the surface of crystal and substrates. These microsound transmission lines, hybrids, and directional couplers interconnect microsound transducers, amplifiers, isolators, and phase shifters to form microsound circuits capable of autocorrelation, Fourier transformation, and cross correlation functions. Compatible component configurations are proposed and evaluated which perform these basic functions. The anticipated difficulties with their realization are discussed and the current status of critical problems including the epitaxial growth of thin films and submicron etching procedures will be given. Several circuits capable of performing correlation functions are given.read more
Citations
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Journal ArticleDOI
Surface elastic waves
TL;DR: In this article, the propagation of various elastic waves at the surfaces of solids is considered, followed by descriptions of the many ways which have been demonstrated for transduction between surface elastic waves and electromagnetic waves.
Journal ArticleDOI
Acoustic surface waveguides - Analysis and assessment
TL;DR: In this article, the properties of acoustic surface waveguides are reviewed, with particular reference to topographic structures in which guiding is achieved by drastic deformation of the substrate surface, and a numerical technique, capable of computing efficiently and with high accuracy the mode spectrum of an anisotropic piezoelectric heterogeneous waveguide of arbitrary cross section, is described.
Journal ArticleDOI
Temperature Dependence of Surface Acoustic Wave Velocity on α Quartz
TL;DR: In this article, a pulsed rf technique was employed to measure the angular dependence of the temperature coefficient of velocity, surface wave delay lines were constructed in which the waves were excited on the quartz by means of an interdigital electrode structure on a glass substrate which was brought into contact with the quartz.
Journal ArticleDOI
Microsound Surface Waveguides
TL;DR: In this paper, the theoretical and experimental progress on topographic guides for the development of surface wave microsound systems is reviewed, and some preliminary results on topographical guides are presented.
Journal ArticleDOI
Some Problems in the Theory of Guided Microsonic Waves
TL;DR: In this article, the wave equation for elastic waves in an isotropic solid is solved generally in Cartesian and in circular cylindrical coordinates, and the solutions are applied in the study of a variety of guiding structures of circular and rectangular symmetry.
References
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Journal ArticleDOI
A method for estimating optimal crystal cuts and propagation directions for excitation of piezoelectric surface waves
J.J. Campbell,W.R. Jones +1 more
TL;DR: In this article, a criterion for judging the relative effeciency of excitation of piezoelectric surface waves as a function of crystal plate orientation and propagation direction is developed based on a velocity change upon application of a thin conducting sheet to the surface.
Journal ArticleDOI
Elastic Surface Waves Guided by Thin Films
TL;DR: In this paper, it was shown that plating which load the substrate can reduce the velocity of straight-crested surface waves, while plating with no load can increase the velocities of the surface wave.