Results 11 to 20 of about 1,095,168 (305)
Raman Radiation Patterns of Graphene [PDF]
ACS Nano, 2015 We report the angular distribution of the G and 2D Raman scattering from graphene on glass by detecting back focal plane patterns. The G Raman emission can be described by a superposition of two incoherent orthogonal point dipoles oriented in the graphene plane.
Harald Budde +7 more
openaire +2 more sources
Optimization of superconducting antenna arrays using RBF neural network [PDF]
International Journal for Simulation and Multidisciplinary Design Optimization, 2010 In this work, RBF neural network is used to optimize the radiation pattern of non-uniform linear arrays of High superconducting rectangular microstrip antennas, on uniaxial anisotropic substrate.
Barkat O., Benghalia A.
doaj +1 more source
Multiband Reconfigurable Antennas for 5G Wireless and CubeSat Applications: A Review
IEEE Access, 2022 The rapid development of wireless technology has sparked interest in multi-band reconfigurable antennas as devices and satellites are innovating toward miniaturization.
Kebonyethebe Ramahatla +3 more
doaj +1 more source
Characterization of Acoustic Sources by Optical Feedback Interferometry
Proceedings, 2017 Sound can be described as the propagation of pressure variations in compressible media that involves compression and expansion and induces a change in the density of the medium.
Fernando Urgiles +2 more
doaj +1 more source
Enhancing and redirecting carbon nanotube photoluminescence by an optical antenna [PDF]
, 2010 We observe the angular radiation pattern of single carbon nanotubes' photoluminescence in the back focal plane of a microscope objective and show that the emitting nanotube can be described by a single in-plane point dipole.
Böhmler, Miriam +6 more
core +1 more source
A Compact Wideband Active Two-Dipole HF Phased Array
Applied Sciences, 2021 The design and construction of an upgraded HF quarter-wavelength two-dipole active array with 90° difference feed was implemented in the course of a research project to perform a directional (azimuthal) investigation of interference at HF.
Antonios Constantinides +1 more
doaj +1 more source
Journal of ICT Research and Applications, 2023 Window methods that are frequently used in the design of finite impulse response filters are also applicable to antenna array designs. This paper explores the application of a Kaiser function in a power-weighted antenna array design, focusing on the ...
Hartuti Mistialustina +2 more
doaj +1 more source
Three-dimensional double helical DNA structure directly revealed from its X-ray fiber diffraction pattern by iterative phase retrieval [PDF]
, 2018 Coherent diffraction imaging (CDI) allows the retrieval of the structure of an isolated object, such as a macromolecule, from its diffraction pattern. CDI requires the fulfilment of two conditions: the imaging radiation must be coherent and the object ...
Fink, Hans-Werner +1 more
core +1 more source
Double-heterostructure cavities: from theory to design [PDF]
, 2012 We derive a frequency-domain-based approach for radiation (FAR) from double-heterostructure cavity (DHC) modes. We use this to compute the quality factors and radiation patterns of DHC modes. The semi-analytic nature of our method enables us to provide a
C. Martijn de Sterke +9 more
core +1 more source
Scattering of Elastic Waves by an Inhomogeneous Boundary in the Acoustic Testing of Permanent Joints
Приборы и методы измерений, 2019 Improving the reliability and testing performance of permanent joints оf different materials made by welding, spraying, gluing, soldering and other methods is an important production task, for which the ultrasonic method is the simplest and most ...
A. R. Baev +3 more
doaj +1 more source