Results 21 to 30 of about 1,103,532 (303)
Embedding Information in Radiation Pattern Fluctuations [PDF]
2020 IEEE International Symposium on Information Theory (ISIT), 2020 The radiation pattern of transmit antennas varies and fluctuates as receivers change their location, other objects move around, and due to the antenna design itself. In this paper, we demonstrate how this observation can be exploited to align most of the interference signal power and significantly increase the average achievable communication rates ...
Milad Johnny, Alireza Vahid
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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
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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
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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
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FORMATION OF THE DIRECTION DIAGRAM IN PHASED ANTENNA ARRAY
Российский технологический журнал, 2019 The article presents the results of the study of phase and temporal methods in the formation of the direction diagram of phased antenna array, and carries out a comparative analysis using an eight-element equidistant antenna array based on Vivaldi ...
N. M. Legkiy, I. V. Unchenko
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Analysis techniques for complex-field radiation pattern measurements [PDF]
, 2018 Complex field measurements are increasingly becoming the standard for state-of-the-art astronomical instrumentation. Complex field measurements have been used to characterize a suite of ground, airborne, and space-based heterodyne receiver missions [1], [
Born +9 more
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Field Tests for Generating Source System and Picking the Seismic Shear Waves to Meet the Engineering Purposes Requirements. [PDF]
Kirkuk Journal of Science, 2019 Many seismic field tests were carried for the designed and modified seismic apparatuses using to generate seismic shear waves. These apparatus includes: "wooden plank" horizontal traction shear wave source, and a modified geophone for picking the SH-Wave
Muhana Ahmed
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IEEE Access, 2023 This work is concerned with a detailed study of an active antenna, which can serve as a prototype of a phased array antenna element for a future lunar very-low-frequency (VLF) radio telescope operating in the frequency range of 1–30 MHz.
Peter L. Tokarsky +2 more
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A dual-polarized slot antenna for millimeter waves [PDF]
, 1998 We describe a new dual-polarized slot antenna to be used with quad-optical devices such as superconductor-insulator-superconductor (SIS) mixers at millimeter and submillimeter wavelengths.
Chattopadhyay, Goutam, Zmuidzinas, Jonas
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Brain and SpineIntroduction: Cervical central spinal stenosis (CCSS) is a leading cause of adult spinal cord dysfunction. Magnetic resonance imaging (MRI) is the reference standard, but reporting is time-consuming and subject to inter-observer variability.
Vasileios Mougios +8 more
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