Results 71 to 80 of about 1,902,856 (342)

Optimizations of Patch Antenna Arrays Using Genetic Algorithms Supported by the Multilevel Fast Multipole Algorithm [PDF]

, 2014
We present optimizations of patch antenna arrays using genetic algorithms and highly accurate full-wave solutions of the corresponding radiation problems with the multilevel fast multipole algorithm (MLFMA).
Ergül, Özgür Salih, Onol, Can
core   +1 more source

Directional emission of light from a nano-optical Yagi-Uda antenna

, 2009
The plasmon resonance of metal nanoparticles can enhance and direct light from optical emitters in much the same way that radio frequency (RF) antennas enhance and direct the emission from electrical circuits.
A Sundaramurthy, AF Koenderink, CA Balanis, DP Fromm, DP Fromm, EM Purcell, FB Craig, G Björk, G Pellegrini, HF Hofmann, Holger F. Hofmann, J Aizpurua, J Li, JN Farahani, KB Crozier, OL Muskens, P Mühlschlegel, PB Johnson, PJ Schuck, RG Hulet, RM Bakker, RM Bakker, S Kühn, S Ogawa, Terukazu Kosako, TH Taminiau, TH Taminiau, Yutaka Kadoya   +27 more
core   +1 more source

The Potential of Using Large Antenna Arrays on Intelligent Surfaces [PDF]

IEEE Vehicular Technology Conference, 2017
In this paper, we consider capacities of single- antenna terminals communicating to large antenna arrays that are deployed on surfaces. That is, the entire surface is used as an intelligent receiving antenna array.
Sha Hu, F. Rusek, O. Edfors
semanticscholar   +1 more source

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende, Emilien Petit, Young Woo Park, Sophie Tezenas du Montcel, James M. Joers, Jonathan M. DuBois, H. Moore Arnold, Michal Povazan, Ipek Özdemir, Guita Banan, Romain Valabregue, Philipp Ehses, Jennifer Faber, Chiadi U. Onyike, Peter B. Barker, Jeremy D. Schmahmann, Eva‐Maria Ratai, Sub H. Subramony, Thomas H. Mareci, Khalaf O. Bushara, Henry Paulson, Thomas Klockgether, Alexandra Durr, Tetsuo Ashizawa, Christophe Lenglet, Gülin Öz, READISCA Investigators   +26 more
wiley   +1 more source

On the Feasibility of Wireless Energy Transfer Using Massive Antenna Arrays

, 2016
We illustrate potential benefits of using massive antenna arrays for wireless energy transfer (WET). Specifically, we analyze probability of outage in WET over fading channels when a base station (BS) with multiple antennas beamforms energy to a wireless
Björnson, Emil, Kashyap, Salil, Larsson, Erik G.   +2 more
core   +1 more source

Scaling up MIMO: Opportunities and Challenges with Very Large Arrays [PDF]

, 2012
This paper surveys recent advances in the area of very large MIMO systems. With very large MIMO, we think of systems that use antenna arrays with an order of magnitude more elements than in systems being built today, say a hundred antennas or more ...
Buon Kiong Lau, Buon Kiong Lau, Buon Kiong Lau, Daniel Persson, Daniel Persson, Daniel Persson, Erik G. Larsson, Erik G. Larsson, Erik G. Larsson, Fredrik Rusek, Fredrik Rusek, Fredrik Rusek, Fredrik Tufvesson, Fredrik Tufvesson, Ove Edfors, Ove Edfors, Post Print, Thomas L. Marzetta, Thomas L. Marzetta, Thomas L. Marzetta   +19 more
core   +2 more sources

Wideband Dual-Polarized Multiple Beam-Forming Antenna Arrays

IEEE Transactions on Antennas and Propagation, 2019
Wideband multibeam antenna arrays based on three-beam Butler matrices are presented in this paper. The proposed beam-forming arrays are particularly suited to increasing the capacity of 4G long-term evolution (LTE) base stations.
He Zhu, Haihan Sun, B. Jones, C. Ding, Y. Guo   +4 more
semanticscholar   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

A Wideband Circularly Polarised Magneto‐Electric Dipole Antenna Array With a Series Sequential Phase Feed Network

The Journal of Engineering
A printed circularly polarised antenna array is presented that utilizes the inherent good bandwidth and stable gain of magneto‐electric dipoles in combination with the wideband benefits of a sequential rotation feed technique.
Elmien Coetzer, Johan Joubert, Johann Wilhelm Odendaal   +2 more
doaj   +1 more source

Current Tracking Adaptive Control of Brushless DC Motors

International Journal of Adaptive Control and Signal Processing, EarlyView.
In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García, Axel Coronado‐Andrade, Gerardo Espinosa‐Pérez, Luis Alvarez‐Icaza   +3 more
wiley   +1 more source