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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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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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Near field representation by far-field samples
1983 Antennas and Propagation Society International Symposium, 2005The pseudo sampling technique is applied in an efficient near-field ...
G. D’Elia +2 more
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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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THE NEAR FIELD TO FAR FIELD TRANSFORMATION
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 1995If a scattering problem is solved by finite element, finite volume or finite difference methods, it is necessary to predict the far field pattern (or radar cross‐section) by using a near field to far field transformation. Usually this is done using the Stratton‐Chu integral relations, which give the far field pattern in terms of a near field surface ...
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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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Far field of polarization gratings
Optics Letters, 1999In a recent Letter [Opt. Lett. 24, 584 (1999)], Gori analyzed polarization gratings and proposed using them as a tool to measure Stokes parameters. Most of his analysis dealt with the near field, but practical exploitation of his approach relies on the far field.
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2007
In asking you, the reader, to metaphorically Step into “Heidegger’s Shoes” I am suggesting that the provisional “truth” of the equipmentality of this text be allowed to fall away to reveal an other-place. The interpretation of the text becomes yours. The collective action of both I, as author, and you, as reader, merely presents the start of a process ...
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In asking you, the reader, to metaphorically Step into “Heidegger’s Shoes” I am suggesting that the provisional “truth” of the equipmentality of this text be allowed to fall away to reveal an other-place. The interpretation of the text becomes yours. The collective action of both I, as author, and you, as reader, merely presents the start of a process ...
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The Near Field and the Far Field
2012The essential information for practical metrology is presented in this chapter, including a brief summary of the near-field properties as well as the basic equations and formulas related to fields generated by simple radiation sources.
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