Results 11 to 20 of about 965,238 (368)

Gravito-electromagnetism versus electromagnetism [PDF]

European Journal of Physics, 2003
The paper contains a discussion of the properties of the gravito-magnetic interaction in non stationary conditions. A direct deduction of the equivalent of Faraday-Henry law is given.
A Tartaglia, Braginsky V B, Ciufolini I, Ciufolini I, DeWitt B S, Fischer U R, Hans C, Iorio L, Kowitt M, Lense J, Li N, Li N, M L Ruggiero, Mashhoon B, Mashhoon B, Misner C W, Pascual-Sánchez J F, Ruggiero M L, Tajmar M, Thirring H, Thirring H   +20 more
core   +6 more sources

Histories Electromagnetism [PDF]

Journal of Mathematical Physics, 2003
Working within the HPO (History Projection Operator) Consistent Histories formalism, we follow the work of Savvidou on (scalar) field theory and that of Savvidou and Anastopolous on (first-class) constrained systems to write a histories theory (both ...
Burch, Aidan
core   +3 more sources

Generalized Gravi-Electromagnetism [PDF]

International Journal of Theoretical Physics, 2010
A self consistant and manifestly covariant theory for the dynamics of four charges (masses) (namely electric, magnetic, gravitational, Heavisidian) has been developed in simple, compact and consistent manner. Starting with an invariant Lagrangian density
A. Singh, A. Singh, A.M. Bork, A.M. Polyakov, B. Julia, B.S. Rajput, B.S. Rajput, B.S. Rajput, B.S. Rajput, C. Lanczos, C. Lanczos, G. ’t Hooft, Gaurav Karnatak, H. Tachibana, J. Singh, J. Singh, J. Singh, J. Singh, J.C. Maxwell, J.C. Maxwell, J.C. Maxwell, J.D. Edmonds Jr., J.D. Edmonds Jr., J.D. Edmonds Jr., K. Imaeda, K. Imaeda, K. Imaeda, K. Imaeda, L. Silberstein, L. Silberstein, L. Silberstein, L. Silberstein, L. Silberstein, O. P. S. Negi, O.P.S. Negi, P. S. Bisht, P.A.M. Dirac, P.A.M. Dirac, P.G. Tait, P.G. Tait, P.S. Bisht, P.S. Bisht, P.S. Bisht, P.S. Bisht, P.S. Bisht, P.S. Bisht, P.S. Bisht, R. Anderson, S. Dangwal, S.M. Grudsky, V. Majernik, V. Majernik, V. Majernik, V.K. Khmelnytskaya, V.V. Kravchenko, V.V. Kravchenko   +55 more
core   +4 more sources

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, Johann Wilhelm Odendaal, Johan Joubert   +2 more
doaj   +1 more source

A general theoretical and experimental framework for nanoscale electromagnetism [PDF]

Nature, 2019
The macroscopic electromagnetic boundary conditions, which have been established for over a century1, are essential for the understanding of photonics at macroscopic length scales.
Yi Yang, Di Zhu, Wei Yan, A. Agrawal, Mengjie Zheng, J. Joannopoulos, P. Lalanne, T. Christensen, K. Berggren, M. Soljačić   +9 more
semanticscholar   +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, Johann W. Odendaal, Johan Joubert   +2 more
doaj   +1 more source

Quasi-topological electromagnetism: Dark energy, dyonic black holes, stable photon spheres and hidden electromagnetic duality [PDF]

Science China Physics Mechanics and Astronomy, 2019
We introduce the quasi-topological electromagnetism which is defined to be the squared norm of the topological 4-form F ∧ F. A salient property is that its energy-momentum tensor is of the isotropic perfect fluid with the pressure being precisely the ...
Hai-Shan Liu, Hai-Shan Liu, Zhan-Feng Mai, Yue Li, H. Lu   +4 more
semanticscholar   +1 more source

Room electromagnetics [PDF]

IEEE Antennas and Propagation Magazine, 2007
Udgivelsesdato ...
Andersen, Jørgen Bach, Nielsen, Jesper Ødum, Bauch, Gerhard, Herdin, Markus, Pedersen, Gert Frølund   +4 more
openaire   +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, Antonio J. Martín Valverde, Borja Plaza, Malte Frövel, David Poyatos, Amelia R. Bretones, Alberto G. Bravo, Salvador G. García   +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, Johan Joubert, Johann W. Odendaal   +2 more
doaj   +1 more source