Journal ArticleDOI
Rayleigh‐wave reflection from groove and step discontinuities
Hang-Sheng Tuan,Robert C. M. Li +1 more
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TLDR
In this paper, a boundary perturbation technique is employed to determine the reflection of a Rayleigh wave from either a shallow groove or a low step in the surface of an isotropic elastic half-space.Abstract:
In an important new class of signal‐processing devices using elastic surface waves, the reflection of a Rayleigh wave from grooves is a key feature. In the present paper, a boundary‐perturbation technique is employed to determine the reflection of a Rayleigh wave from either a shallow groove or a low step in the surface of an isotropic elastic half‐space. Comparison with available experimental data for the case of the rectangular groove and step yields excellent agreement.read more
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Journal ArticleDOI
Wave scattering from rough surfaces
TL;DR: A review of the literature pertinent to wave scattering from rough surfaces is given in this paper, where the early techniques developed for this problem are discussed, including the perturbation technique and the Kirchhoff approximation.
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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.
Book ChapterDOI
Surface Acoustic Waves
A. A. Maradudin,G. I. Stegeman +1 more
TL;DR: In this paper, it was shown that a semi-infinite, isotropic, elastic medium, bounded by a single, stress-free, planar surface, can support surface vibration modes that are wavelike in directions parallel to the surface of the solid, but whose amplitudes decay exponentially with increasing distance into the solid from the surface, with a decay length that is of the order of the wavelength of the wave along the surface.
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Properties and applications of reflective-array devices
TL;DR: The use of reflective arrays in surface-wave devices has yielded new devices such as resonators in addition to an enlarged parameter range for radar pulse expanders and compressors as mentioned in this paper, where low spurious levels and precise phase and amplitude response have been achieved in devices with time-bandwidth products as large as 104.
Journal ArticleDOI
Finite element analysis of Rayleigh wave interaction with finite-size, surface-breaking cracks.
Waled Hassan,William Veronesi +1 more
TL;DR: In the high crack depth to wavelength ratio (a/lambda(R)) regime, the finite element and experimental results close to the crack approach the limiting value of the reflection coefficient from a 90 degrees corner.