Results 131 to 140 of about 178,609 (236)

Single-Motor Controlled Mechanically Frequency Reconfigurable Unidirectional Antenna Array With Stable Radiation Patterns

IEEE Open Journal of Antennas and Propagation
This article presents a mechanically frequency-reconfigurable monopole antenna and array that offers a wide tuning range, gain enhancement, and stable beamwidth. The monopole is positioned above a large reflector plate to achieve unidirectional radiation
Abubakar Muhammad Sadiq, Minglve Liu, Xiao Zhang, Yu Luo, Yan Chen, Kaixue Ma   +5 more
doaj   +1 more source

Electric - magnetic duality, monopole condensation, and confinement in N=2 supersymmetric Yang-Mills theory [PDF]

, 1994
N. Seiberg, N. Seiberg, E. Witten
semanticscholar   +1 more source

Compact Size 4-Port MIMO Antenna Formed with Two-Branches Strip-Monopoles with Bandwidth Enhancement Using a T-Stub Line-Load

Applied Sciences
This work presents a compact four-port MIMO antenna with each radiator consisting of a conventional two-monopole array fed at a single point by a coplanar line and reactively loaded with a stub.
Jose Alfredo Tirado-Mendez, Hildeberto Jardon-Aguilar, Roberto Linares-Miranda, Erik Fritz-Andrade, Ruben Flores-Leal, Angel Perez-Miguel, Ricardo Gomez-Villanueva   +6 more
doaj   +1 more source

Experimental Realization of a Dirac Monopole through the Decay of an Isolated Monopole

Physical Review X, 2017
We experimentally observe the decay dynamics of deterministically created isolated monopoles in spin-1 Bose-Einstein condensates. As the condensate undergoes a change between magnetic phases, the isolated monopole gradually evolves into a spin ...
T. Ollikainen, K. Tiurev, A. Blinova, W. Lee, D. S. Hall, M. Möttönen   +5 more
doaj   +1 more source

3D-structure coupled monopole designs with lower frequency resonance

ETRI Journal
In this study, we investigated three-dimensional configurations involving a monopole-coupled wired ring, a hollow metallic cylinder, and wired helix spring to achieve resonance lower than quarter-wave resonance. The reso-nance frequency of a quarter-wave
Enamul Khan, Md. Ataur Safi Rahaman Laskar, Khan Masood Parvez, SK. Moinul Haque   +3 more
doaj   +1 more source

Welfare‐Increasing Monopolization*

The Journal of Industrial Economics
The conditions for monopolization to be good for social welfare are examined. Social welfare can be higher when a monopoly sells to a monopoly, with double margins, than when a competitive industry sells to a downstream Cournot oligopoly with differing efficiency levels.
openaire   +4 more sources

Observation of monopole topological mode

Nature Communications
Among the many far-reaching consequences of the potential existence of a magnetic monopole, it induces a topological zero mode in the Dirac equation, which was derived by Jackiw and Rebbi 48 years ago and has been elusive ever since.
Hengbin Cheng, Jingyu Yang, Zhong Wang, Ling Lu   +3 more
doaj   +1 more source

Compact EBG-Backed Planar Monopole for BAN Wearable Applications

IEEE Transactions on Antennas and Propagation, 2017
M. A. B. Abbasi, S. Nikolaou, M. Antoniades, Marija Nikolić Stevanović, P. Vryonides   +4 more
semanticscholar   +1 more source