Results 251 to 260 of about 361,087 (295)
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International Journal of RF and Microwave Computer-Aided Engineering, 2020
AbstractIn this paper, the multiple refraction phenomenon is investigated on theboundary of a scalar impedance surface (SIS) and a tensor impedance surface(TIS).
Mojtaba Mighani, Gholamreza Dadashzadeh
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AbstractIn this paper, the multiple refraction phenomenon is investigated on theboundary of a scalar impedance surface (SIS) and a tensor impedance surface(TIS).
Mojtaba Mighani, Gholamreza Dadashzadeh
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Impedance of surface footings on layered ground
Computers & Structures, 2008Traditionally only the static bearing capacity and stiffness of the ground is considered in the design of wind turbine foundations. However, modern wind turbines are flexible structures with resonance frequencies as low as 0.2 Hz. Unfortunately, environmental loads and the passage of blades past the tower may lead to excitation with frequencies of the ...
Andersen, Lars, Clausen, Johan Christian
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Surface Impedance Mapping Using Sferics
IEEE Transactions on Geoscience and Remote Sensing, 2014Naturally occurring radio emissions from discrete sferics in the frequency range 500 Hz to 30 kHz have the potential for shallow conductivity profiling beneath the surface of the earth. A dual-channel time-domain receiver was constructed and used over selected geophysical targets.
Gavin T. Mogensen +2 more
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SURFACE IMPEDANCE TENSORS OF TEXTURED POLYCRYSTALS
Structural Stability and Dynamics, 2002zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Tanuma, Kazumi +3 more
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Surface Impedance of a Superconductor in a Magnetic Field
Physical Review, 1960Explicit expressions for the static magnetic field variation of the surface impedance in a superconductor are derived. Detailed consideration is given to the two limiting cases of the classical skin effect and of the extreme anomalous skin effect, with the static field either parallel or perpendicular to the rf current.
Dresselhaus, G., Spiewak Dresselhaus, M.
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Surface Impedance of Superconductors
Reviews of Modern Physics, 1964Surface impedance theory and measurements at a few kMc or less on superconductors near the weak coupling limit (e.g., Sn) are reviewed. Discrepancies between theory and experiment are noted, and it is found that all these discrepancies can be explained in terms of anisotropy of the Fermi surface, anisotropy of the energy gap, and inexactness of the ...
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Effective impedance tensor of a statistically uneven impedance surface
Radiophysics and Quantum Electronics, 1985Within the approximation of the perturbation theory, the authors determine the characteristics of the reflection of plane electromagnetic waves from a statistically uneven impedance surface with an nonisotropic roughness spectrum. They calculate the effective impedance tensor, the Fourier amplitude of fluctuations of the scattered field, and the total ...
A. S. Bryukhovetskii, I. M. Fuks
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Analysis of dispersion and impedance properties of infrared impedance surfaces
2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2013A stratified structure which supports the propagation of infrared surface waves is designed. The dispersion and impedance characteristics of the surface waves are studied in detail for an array of square patches. The field propagation of basic TE and TM modes at different frequencies are studied.
Mohanapriya Swaminathan +2 more
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Copper Conducting Surface: A Zero Impedance Surface
2021In this paper, the reflection of the electromagnetic wave at the surface of a conductive medium is analyzed theoretically in order to characterize the behavior of electric and magnetic field just inside and outside of the conducting medium. A case study is considered assuming copper as the conducting medium. From the study, indeed negligible difference
Durga P. Kar +3 more
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The surface impedance of superconductors
Advances in Physics, 1964Abstract New measurements of the surface impedance of superconducting tin and tin-indium alloys at 3 kMc/s, obtained by measuring the bandwidth and characteristic frequency of a resonator containing the specimen, are reported. The results are compared in detail with the microscopic theory, those on the low temperature surface reactance being reduced to
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