Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Pyotr Ya. Ufimtsev"'
Autor:
Pyotr Ya. Ufimtsev, Gokhan Apaydin
Publikováno v:
International Journal of Modern Physics C. 34
Fresnel diffraction is a fundamental wave phenomenon happening near the shadow boundary behind a large opaque object. Previously, it was studied for the case of diffraction at large apertures in a black screen. In this paper, we investigate this phen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3272cf6efda4c97fc1e75cafc395ee38
https://doi.org/10.1142/s0129183123500407
https://doi.org/10.1142/s0129183123500407
Publikováno v:
The Journal of the Acoustical Society of America. 151(6)
Fresnel diffraction is a fundamental wave phenomenon. This article explains its physical nature using the examples of the diffraction of acoustic waves at soft and hard half-planes and at large apertures on a black screen. It is shown that the shadow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67099aaa7fe1c07bd48195295529dde3
https://pubmed.ncbi.nlm.nih.gov/35778171
https://pubmed.ncbi.nlm.nih.gov/35778171
Autor:
Pyotr Ya. Ufimtsev, Gokhan Apaydin
Publikováno v:
IEEE Transactions on Antennas and Propagation. 69:1581-1587
The physical theory of diffraction (PTD) is presented for triangular cylinders with faces consisting of soft ( electric ) and hard ( magnetic ) sections. It is shown that the specular reflections from such cylinders can be canceled and shifted with a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2bcdf7d7bd3f367922079d99d3e3a88
https://doi.org/10.1109/tap.2020.3016499
https://doi.org/10.1109/tap.2020.3016499
Autor:
Pyotr Ya. Ufimtsev, Gokhan Apaydin
Publikováno v:
IET Microwaves, Antennas & Propagation. 14:1117-1123
Diffraction at a strip with one face soft (electric) and the other hard (magnetic) is studied. New results obtained by the method of moments (MoM) are compared with the asymptotic theory of edge diffraction (TED) for the totally soft and hard strips.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee2aeb169aff5e1061273230ae5d0558
https://doi.org/10.1049/iet-map.2019.1003
https://doi.org/10.1049/iet-map.2019.1003
Publikováno v:
Optik. 166:90-94
Modified theory of physical optics (MTPO) solution for a soft/hard strip is analyzed. It is shown that this solution is incorrect because the MTPO Green function does not satisfy boundary conditions. Defects of MTPO in calculations of fringe waves ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7549adcb9af456727764fa3230485eca
https://doi.org/10.1016/j.ijleo.2018.04.009
https://doi.org/10.1016/j.ijleo.2018.04.009
Publikováno v:
Electromagnetics. 38:217-225
The paper investigates diffraction at trilateral cylinders with combinations of soft (electric) and hard (magnetic) faces. Scattered field in far zone is calculated according to the physical theory of diffraction. The first-order high-frequency appro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3967f41efe1b40263c3deb6204832bca
https://doi.org/10.1080/02726343.2018.1457267
https://doi.org/10.1080/02726343.2018.1457267
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 16:2590-2593
The letter extends the physical theory of diffraction (PTD) for objects with rounded edges. It represents a combination of the fundamental PTD concept of fringe currents and the method of moments (MoM). The objects in the vicinity of edges are consid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcc96afaa447b0c92b781dbd00f85a55
https://doi.org/10.1109/lawp.2017.2734958
https://doi.org/10.1109/lawp.2017.2734958
Publikováno v:
Radio Science. 51:1570-1578
Novel, fringe wave integral equations that account for the diffraction from nonpenetrable wedges with both soft and hard boundaries are derived. Method of moments simulation of fringe waves generated by a plane wave that excites the wedge is performe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18cefbfbbea844f4857969786e95f3a4
https://doi.org/10.1002/2016rs006100
https://doi.org/10.1002/2016rs006100
Publikováno v:
IEEE Transactions on Antennas and Propagation. 64:1891-1899
Physical theory of diffraction (PTD) is developed for the field scattered at a perfectly conducting rectangular plate. Grazing incidence and grazing scattering are analyzed. High-frequency asymptotic estimations are derived. Bistatic and monostatic s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::178464f3ee7f7f0b44e83ea235934e1f
https://doi.org/10.1109/tap.2016.2536171
https://doi.org/10.1109/tap.2016.2536171
Publikováno v:
IEEE Transactions on Antennas and Propagation. 64:1125-1130
Fringe waves represent the diffracted field generated by the nonuniform/fringe surface currents concentrated in vicinity of sharp scattering edges. For perfectly conducting wedges, they have been studied in a number of publications. In this communica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a337f1f91375927db407b113c7c9e36
https://doi.org/10.1109/tap.2016.2515133
https://doi.org/10.1109/tap.2016.2515133