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Electromagnetic Wave Propagation, Radiation, and Scattering
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In this article, the fundamental field equations of wave propagation in homogeneous and layered media waveguides and cavities have been studied, including the effects of a dipole on the conducting earth, inverse scattering radiometry, and interferometry numerical techniques.Abstract:
Fundamental field equations waves in homogeneous and layered media waveguides and cavities Green's functions radiation from apertures and beam waves periodic structures and coupled mode theory dispersion and anisotropic media antennas, apertures and arrays scattering of waves by conducting and di-electric objects waves in cylindrical structures, spheres and wedges scattering of complex objects geometric theory of diffraction and low fequency techniques planar layers, strip lines, patches and apertures radiation from a dipole on the conducting earth, inverse scattering radiometry, noise temperature and interferometry numerical techniques.read more
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Simulation files for "Numerical results" section in "The impact of reduced conductivity on the performance of wire antennas"
Abstract: Low cost methods of antenna production primarily aim to reduce the cost of metalization. This might lead to a reduction in conductivity. A systematic study on the impact of conductivity is presented. The efficiency, gain, and bandwidth of cylindrical wire meander line, dipole, and Yagi-Uda antennas were compared for materials with conductivities in the range 103- 109 S/m. In this range, the absorption efficiency of both the dipole and meander line changed little; however, the conductivity significantly impacts on radiation efficiency and the absorption cross section of the antennas. The extinction cross section of the dipole and meander line antennas (antennas that Thevenin equivalent circuit is applicable) also vary with radiation efficiency. From the point of radiation efficiency, the dipole antenna performance is most robust under decreasing conductivity. Antennas studied in this study were fabricated with brass and graphite. Radiation efficiency of the antennas was measured by improved Wheeler cap (IWC) method. Measurement results showed a reasonable agreement with simulations. We also measured the extinction cross section of the six fabricated prototypes.
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Study of the surface wave vibrations in a functionally graded material layered structure: a WKB method:
Shishir Gupta,Neelima Bhengra +1 more
TL;DR: In this paper, a theoretical investigation of the propagation behavior of Love-type waves in a functionally graded material layered structure is described, where the Wentzel-Kramers-Brillouin (WKB) meth is considered.
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Моделирование распределения интенсивности в прозрачной среде с френелевскими границами, содержащей наночастицы алюминия
Александр Андреевич Звеков,Александр Васильевич Каленский,Андрей Павлович Никитин,Борис Петрович Адуев +3 more
TL;DR: In this paper, the angular radiance distribution on the slab boundaries and in the slab center were calculated, and it was concluded that Fresnel boundary conditions make the angular distribution on slab boundaries asymmetric.
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Dispersion features of complex waves in a graphene-coated semiconductor nanowire
TL;DR: In this article, a detailed classification of waveguide modes was carried out based on the analysis of characteristics of the phase and attenuation constants obtained from the complex roots of characteristic equation.
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A Novel Boundary Element Method Using Surface Conductive Absorbers for Full-Wave Analysis of 3-D Nanophotonics
TL;DR: In this article, a surface-conductivity absorber is proposed for fast surface integral equation (SIE) methods to simulate 3-D nanophotonic devices, which can achieve a reflected power of less than 10-7, and the magnitude of the transition reflection is proportional to 1/L2d+2.