Results 231 to 240 of about 13,719,025 (270)
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Near-field degree of polarization
SPIE Proceedings, 2003We investigate an extension of the concept of degree of polarization for arbitrary electromagnetic fields, i.e., fields whose wave structure is not necessarily planar. We show how this formulation relates the degree of polarization to the correlations between the three orthogonal components of the electric field.
Tero Setala +3 more
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Continuation of acoustic near-fields
The Journal of the Acoustical Society of America, 2003This paper deals with the analytic continuation of a coherent pressure field specified on a finite sheet located close to and conformal to the surface of a vibrator. This analytic continuation is an extension or extrapolation of the given (measured) field into a region outside and tangential to the original finite sheet, and is based on the Green’s ...
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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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Near field superdirectivity (NFSD)
Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181), 2002In some array applications, the source of interest is close to the array, so that we have to use a near-field model. Almost always the near-field is considered as an additional difficulty. We contradict this point of view and show that if the desired source is in the near-field and the other sources are in the far-field, then even a small array can be ...
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Near-field radiative heat transfer in many-body systems
Reviews of Modern Physics, 2021J C Cuevas +2 more
exaly
1998
In Chap. 12 we derived the Thompson-Gray measurement model using both a direct approach and an approach based on reciprocity relations. In either case, we assumed the incident and scattered waves could be treated as quasi-plane waves modified by appropriate diffraction correction terms and the scattering amplitude was assumed to be slowly varying so ...
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In Chap. 12 we derived the Thompson-Gray measurement model using both a direct approach and an approach based on reciprocity relations. In either case, we assumed the incident and scattered waves could be treated as quasi-plane waves modified by appropriate diffraction correction terms and the scattering amplitude was assumed to be slowly varying so ...
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Electromagnetic Near-field Interpolation for Spherical Near-field to Far-field Transformations
2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2023Kitiphon Sukpreecha +3 more
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Visible-to-THz near-field nanoscopy
Nature Reviews MaterialsRainer Hillenbrand +4 more
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Codebook design and beam training for extremely large-scale RIS: Far-field or near-field?
China Communications, 2022Yajun Zhao, Linglong Dai, Xiuhong Wei
exaly