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Showing 1 to 20 of 29 for “"Transmission Coefficients"”.
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Reflection and transmission coefficients in multi-wave inhomogeneous media.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1970. Ph.D.
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Joint identification in structural waveguides using wave reflection and transmission coefficients
… is employed to investigate the reflection and transmission coefficients of various joint models in structural waveguides. The reflection and transmission coefficients are potentially more sensitive to the parameters of the joint models. Numerical simulations and experiments have been performed …
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Asymptotic description of the acoustic microscopy of a surface-breaking crack
… is characterized by assigning it reflection and transmission coefficients. The wavefield scattered from the crack is estimated by tracing the leaky Rayleigh waves reflected and transmitted by the crack. Lastly, the acoustic signature is calculated by using the approximate incident and scattered …
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A Riemann-Hilbert approach to scattering on a one-dimensional semi-infinite crystal
… regarding a relation between the reflection and transmission coefficients.
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SEISMIC SIGNATURES OF PORE CONNECTIVITY
… dispersions, attenuations, and reflection and transmission coefficients are computed and analyzed in detail. Results show frame inelasticity has considerable influence on reflection and transmission coefficients in certain frequencies and incidence angles.
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Studies of neutron inelastic scattering in crystal and liquid scintillators
… the calculated cross sections based on neutron transmission coefficients given by Auerbach and Perey.
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Interaction of acoustic waves and anisotropic multilayered composite plates immersed in water.
… composite plates is presented. Reflection and transmission coefficients as a function of the plane wave incident angle and ultrasonic wave frequency are computed for single layered and multilayered plates. From the minima of the reflection spectra one can obtain the Lamb wave modes. Computation …
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A study of periodic gratings in planar dielectric waveguides
… using coupled-mode theory. Power reflection and transmission coefficients are calculated for single gratings as well as two gratings of the same period and depth but arbitrary lengths and separated by a specified distance. The spectral response is examined for several cases. The influence of …
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Ultrasonic wave propagation in thick, layered composites containing degraded interfaces
… interface contact quality on the reflection and transmission coefficients of degraded interfaces is observed in both the simulated and theoretical results.
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Inverse problems in electromagnetics
… from the measurement of the reflection and the transmission coefficients. A robust method is proposed for the retrieval of metamaterials as isotropic media, and four improvements over the existing methods make the retrieval results more stable. Next, a new scheme is presented for the retrieval …
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Transmission of sound through nonuniform circular ducts with compressible mean-flows
… theory is developed to determine the sound transmission and attenuation through an infinite, hard-walled or lined, circular duct carrying compressible, sheared, mean flows and having a variable cross section. The theory is applicable to large as well as small axial variations, as long as the …
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Analysis, design, and implementation of a reconfigurable fractal volumetric left-handed metamaterial
… modeling software HFSS where the reflection and transmission coefficients are calculated. Through simulations, each size of SRR is independently optimized and shown to have a broad frequency range where its resonance can be selected from. The two SRRs are subsequently combined in a single …
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Computational Modeling of Geometry Dependent Phonon Transport in Silicon Nanostructures
… to calculate phonon spectra and modal phonon transmission coefficients in geometrically irregular nanostructures. The computational tool is used to evaluate the accuracy and regimes of applicability of alternative computational techniques based upon continuum elastic wave theory. The model is …
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Scattering matrix analysis of photonic crystals
… approach we analyze and study the scattering and transmission of waves through a two-dimensional photonic crystal which consists of a periodic array of parallel rods with circular cross sections. Without making any assumptions about normal incidence, single mode propagation, and sufficient …
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Guided modes and resonant transmission in periodic structures
… extend previous complex perturbation analysis of transmission anomalies to structures whose coefficients are only required to be measurable and bounded from above and below, and we establish sufficient conditions involving structural symmetry that guarantee that the transmission coefficient reach …
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Through-the-Wall Imaging and Multipath Exploitation
… of the reinforced walls, and incorporate their transmission coefficients into the beamforming method to achieve better estimation accuracy. In a related effort, we utilize the sparsity constraint to improve electromagnetic imaging of hidden conducting targets, assuming that a set of equivalent …
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Spherical wave reflection and transmission
This study is concerned with the reflection and transmission of spherical waves at a plane interface between two different media. The phenomenon of the reflection and transmission of spherical waves has been studied by means of analytical methods, numerical computation, and experimental tests. A …
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Acoustic scattering analysis for remote sensing of manganese nodules
… waves characterized by coherent reflection and transmission coefficients. The multiple scattering effect is found to be a higher order correction to the average scattered field. For a sparse distribution of nodules, the average scattered field can be well evaluated using the single scattering …
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Arbitrarily Oriented Biaxially Anisotropic Media: Wave Behavior and Microstrip Antennas
… biaxial) media is presented. The reflection and transmission behaviors of electromagnetic waves from half-space and two-layer isotropic-biaxial interfaces are studied. The reflection and transmission coefficients are used in the formulation of eigenvector dyadic Green's functions. These Green's …
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Theory of quantum interference in molecular junctions
… a single molecule junction is described by the transmission coefficient, which describes how electrons pass through a molecule from one electrode to the other. Predicting features related to the transmission coefficient is a powerful tool for probing the electronic structure of molecular …
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