Scattering of the Transverse Waveguide Modes of Surface Acoustic Waves by the Finite-Aperture Electrode Structures

We develop a physical model allowing one to analyze reflection of the inhomogeneous beams of surface acoustic waves from metal strips in a planar waveguide on the piezoelectric substrate. Analytical relationships for determining the coefficients of scattering and mutual conversion of the transverse...

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Bibliographic Details
Published in:Radiophysics and quantum electronics 2016-08, Vol.59 (3), p.225-233
Main Authors: Sveshnikov, B. V., Bagdasaryan, A. S.
Format: Article
Language:English
Subjects:
Analysis
Apertures
Astronomy
Astrophysics and Astroparticles
Beams (radiation)
Electrodes
Energy conservation
Energy law
Environmental law
Hadrons
Heavy Ions
Lasers
Mathematical analysis
Mathematical and Computational Physics
Metal strips
Nuclear Physics
Observations and Techniques
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Quantum Optics
Scattering
Surface acoustic waves
Theoretical
Waveguides
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Summary:We develop a physical model allowing one to analyze reflection of the inhomogeneous beams of surface acoustic waves from metal strips in a planar waveguide on the piezoelectric substrate. Analytical relationships for determining the coefficients of scattering and mutual conversion of the transverse waveguide modes during their interaction with the spatially limited Bragg reflectors are obtained. The waveguide-reflector characteristics are shown to depend on the ratio of the waveguide aperture to its maximum value for which only the fundamental transverse mode is excited. It is established that the developed model strictly corresponds to the energy conservation law, i.e., in the absence of dissipation, the power of the inhomogeneous beam, which is incident on the finite reflector, is equal to the total power of all the scattered fields of the discrete and continuous waveguide spectra.
ISSN:0033-8443
1573-9120
DOI:10.1007/s11141-016-9691-9