Results 11 to 20 of about 58,163 (177)
Knotted solutions for linear and nonlinear theories: Electromagnetism and fluid dynamics [PDF]
Physics Letters B, 2017 We examine knotted solutions, the most simple of which is the “Hopfion”, from the point of view of relations between electromagnetism and ideal fluid dynamics.
Alves, D. W. F. +3 more
core +5 more sources
Long-term Transmission Characteristics of CYTOP Fiber Exposed to Gamma Radiation [PDF]
EPJ Web of Conferences, 2021 We investigated post-irradiation variations of the radiation induced attenuation (RIA) of polymer perfluorinated (CYTOP) optical fiber exposed to gamma radiation.
Chapalo Ivan +5 more
doaj +1 more source
A Wideband Feed Network for Vivaldi Antenna Arrays
International Journal of Antennas and Propagation, 2022 A wideband feed network for a Vivaldi antenna array is presented. A limitation of current wideband antenna arrays is the bandwidth of either the feed network or the antenna element.
Natasha Antoinette Hall +2 more
doaj +1 more source
Compact 0.5–18 GHz double‐ridged guide horn antenna
IET Microwaves, Antennas & Propagation, 2021 Broadband double‐ridged guide horn (DRGH) antennas are extensively used in antenna measurement and electromagnetic compatibility and interference testing, especially the 1–18 GHz DRGH antenna which is widely accepted as a standard for this band.
Bennie Jacobs +2 more
doaj +1 more source
A Subcell Finite-Difference Time-Domain Implementation for Narrow Slots on Conductive Panels
Applied Sciences, 2023 Efficiently modeling thin features using the finite-difference time-domain (FDTD) method involves a considerable reduction in the spatial mesh size. However, in real-world scenarios, such reductions can lead to unaffordable memory and CPU requirements ...
Miguel Ruiz Cabello +7 more
doaj +1 more source
The implementation of wideband 90° hybrids on non‐optimal substrates
Electronics Letters, 2022 A new technique to implement wideband 90° hybrid coupling profiles on non‐optimal substrate configurations is presented. The technique uses an impedance taper over the whole length of the hybrid to remove the restriction of a substrate defined maximum ...
Johan B. du Toit +2 more
doaj +1 more source
Surface Plasmon Resonance sensor based on a D-shaped photonic crystal fiber with a bimetallic layer [PDF]
EPJ Web of Conferences, 2020 The investigation of a D-shaped photonic crystal fiber sensor with a bimetallic layer for operation at the visible and infrared spectra is presented. The bimetallic layer is composed by silver and gold slabs deposited adjacently on the flat face of the ...
Cardoso Markos P. +7 more
doaj +1 more source
Transverse force sensing with a uniform FBG and unpolarized light via machine learning. [PDF]
Sci RepIn this paper, we report that a uniform fiber Bragg grating (FBG), interrogated with broadband light, can be used to reliably measure transverse force through the analysis of its unpolarized reflected amplitude spectrum.
Tocanne V +4 more
europepmc +2 more sources
Anomalous Reflection From a Phase Gradient Metasurface With Arbitrary Incident Angle
IEEE Access, 2023 A planar phase gradient metasurface (PGM) with phase gradients in two in-plane directions will introduce two additional wave vectors to the reflected wave vector.
Wihan Barnard +2 more
doaj +1 more source
Sensors, 2022 The characteristics of fiber Bragg grating (FBG) in cyclic transparent fluoropolymer (CYTOP) optical fiber have attracted more and more attention in recent years.
Ying-Gang Nan +5 more
doaj +1 more source