Results 241 to 250 of about 13,209,149 (311)
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On the Far Field in Obstacle Scattering
SIAM Journal on Applied Mathematics, 1999Far field identities for the scattering of time-harmonic acoustic waves from sound-soft and sound-hard obstacles are proven. Two applications of these identities for the inverse obstacle scattering problem are discussed: an alternate proof for the Fréchet differentiability of the far field pattern with respect to the boundary and a new method for the ...
Lassi Päivärinta, Rainer Kress 0001
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Semidefinite relaxation method for unified near-Field and far-Field localization by AOA
Signal Processing, 2021This paper investigates the unified near-field and far-field localization using angle-of-arrival measurements, where the knowledge that the source is in the near-field or far-field is not required.
Xianjing Chen +2 more
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Metal nanolens transforming far-field into far-field
2009 11th International Conference on Transparent Optical Networks, 2009In this communication we present technical details of performance of recently proposed silver nanolens which transforms a far-field source into a far-field focus [P. Wrobel, J. Pniewski, T.J. Antosiewicz, T. Szoplik, “Focusing radially polarized light by concentrically corrugated silver film without a hole” Phys. Rev. Lett., in print (2009)].
Piotr Wrobel +3 more
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Journal of the Acoustical Society of America, 2021
The near and far fields of traditional loudspeakers are differentiated by whether the sound pressure amplitude is inversely proportional to the propagating distance. However, the audio sound field generated by a parametric array loudspeaker (PAL) is more
Jiaxin Zhong, R. Kirby, X. Qiu
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The near and far fields of traditional loudspeakers are differentiated by whether the sound pressure amplitude is inversely proportional to the propagating distance. However, the audio sound field generated by a parametric array loudspeaker (PAL) is more
Jiaxin Zhong, R. Kirby, X. Qiu
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IEEE transactions on electromagnetic compatibility (Print), 2022
We present a set of formulas for determining the far-field region of a radiator, or scatterer, by examining the integral representation of the magnetic field scattered by a thin straight wire.
J. Asvestas
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We present a set of formulas for determining the far-field region of a radiator, or scatterer, by examining the integral representation of the magnetic field scattered by a thin straight wire.
J. Asvestas
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Far‐field potentials in muscle
Muscle & Nerve, 1991AbstractFar‐field potentials have been predicted by computer simulations as well as demonstrated in both animals and humans with respect to the peripheral and central nervous systems. Computer simulations have also predicted far‐field potentials originating at the termination of muscle tissue.
D, Dumitru, J C, King
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2015 Conference on Microwave Techniques (COMITE), 2015
The design of completely rebuilt antenna far-field range is described. The results of new measurement campaign are given for various cases. The paper analyzes briefly electromagnetic wave propagation over irregular terrain by physical optics approximation of vector problem using an enhanced analysis.
Schejbal Vladimír +4 more
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The design of completely rebuilt antenna far-field range is described. The results of new measurement campaign are given for various cases. The paper analyzes briefly electromagnetic wave propagation over irregular terrain by physical optics approximation of vector problem using an enhanced analysis.
Schejbal Vladimír +4 more
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A Tutorial on MIMO-OFDM ISAC: From Far-Field to Near-Field
IEEE Communications Surveys and TutorialsIntegrated sensing and communication (ISAC) is one of the key usage scenarios for future sixth-generation (6G) mobile communication networks, where communication and sensing (C&S) services are simultaneously provided through shared wireless spectrum ...
Qianglong Dai +12 more
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Superresolution in far-field imaging
Optics Letters, 2000We demonstrate the feasibility of achieving superresolved images by using Fourier-plane phase masks and image multiplication, which together create effective point-spread functions that are not positive definite and therefore cannot be created by any single Fourier plane mask in a linear system.
Leiserson, I. +2 more
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Hybrid Near-Far Field Channel Estimation for Holographic MIMO Communications
IEEE Transactions on Wireless CommunicationsHolographic MIMO communications, enabled by large-scale antenna arrays with quasi-continuous apertures, are potential technology for spectrum efficiency improvement.
Shaohua Yue +4 more
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