Results 101 to 110 of about 85,977 (300)

A Low-Profile Frequency Reconfigurable Grid-Slotted Patch Antenna

IEEE Access, 2018
This paper presents a novel low-profile high gain frequency reconfigurable patch antenna with unidirectional radiation pattern by using a grid-slotted patch with tunable varactors loading.
Yuan-Ming Cai, Ke Li, Yingzeng Yin, Steven Gao, Wei Hu, Luyu Zhao   +5 more
doaj   +1 more source

On Artificial Magneto-Dielectric Loading for Improving the Impedance Bandwidth Properties of Microstrip Antennas

, 2005
In the present paper we discuss the effect of artificial magneto-dielectric substrates on the impedance bandwidth properties of microstrip antennas. The results found in the literature for antenna miniaturization using magnetic or magneto-dielectric ...
Ikonen, Pekka, Maslovski, Stanislav, Simovski, Constantin, Tretyakov, Sergei   +3 more
core   +2 more sources

Counterion‐Controlled Photocatalytic Doping of Organic Semiconductors

Advanced Materials, EarlyView.
Counterion size is shown to actively control photocatalytic doping in organic semiconductors. Small anions suppress aggregation of acridinium photocatalysts, enhance electron transfer, and dramatically increase doping efficiency. This simple strategy enables conductivities up to 2000 S cm−1 in benchmark polymers, revealing counterions as a powerful yet
Tiefeng Liu, Zesheng Liu, Ihor Sahalianov, Qiao He, Sang Young Jeong, Huotian Zhang, Qifan Li, Chi‐Yuan Yang, Junpeng Ji, Lize Bynens, Wouter Maes, Feng Gao, Han Young Woo, Martin Heeney, Glib Baryshnikov, Mats Fahlman, Simone Fabiano   +16 more
wiley   +1 more source

Water-Based Microwave Antennas

, 2020
The interesting properties of water makes it an attractive material platform for many microwave applications including artificial material design, sensing, heating systems and dielectric resonator antennas. Presently, electrically small versions of the latter are considered. We present the numerical and experimental results for an antenna consisting of
Jacobsen, Rasmus Elkjær, Vandborg, Mads H., Laurynenka, Andrei, Arslanagic, Samel   +3 more
openaire   +1 more source

Microwave Absorption for Detection of Dirac Fermions in SnTe Films

Advanced Materials Interfaces, EarlyView.
Microwave absorption can detect Dirac fermions in samples exposed to the atmosphere. Results showed that although topological surface states are robust against environmental degradation, they are not detectable by electrical transport measurements. Hence, microwave absorption can detect Dirac fermions even in samples whose surfaces have deteriorated ...
Wellington P. do Prado, Jorge A. Navarro‐Giraldo, Muhammad Tahsin, Vinicius T. Santana, Eduardo Abramof, Paulo H. O. Rappl, Suelen de Castro, Marcelos L. Peres, Petr Neugebauer   +8 more
wiley   +1 more source

On the theory of cavities with point-like perturbations. Part II: Rectangular cavities

, 2010
We consider an application of a general theory for cavities with point-like perturbations for a rectangular shape. Hereby we concentrate on experimental wave patterns obtained for nearly degenerate states. The nodal lines in these patterns may be broken,
Albeverio S, Demkov Yu N, H-J Stöckmann, Rahav S, Stöckmann H-J, T Tudorovskiy, Tudorovskiy T, Tudorovskiy T, U Kuhl   +8 more
core   +2 more sources

Hybrid Magnetoactive Soft Elastomers: Material Development Toward Application in Diaphragm Pumps

Advanced Materials Technologies, EarlyView.
Hybrid magnetoactive soft elastomeric membranes are developed by combining two different types of magnetic particles. The membranes exhibit distinct mechanical, magnetic and thermal properties owing to the unique characteristics of the two magnetic particles.
Somashree Mondal, Paweł Orkisz, Bogdan Sapiński, Ralph Spolenak, Frank Clemens   +4 more
wiley   +1 more source

Wideband Direction-of-Arrival Estimation With Arbitrary Array via Coherent Annihilating

IEEE Access, 2019
In this paper, a new wideband DOA estimation method for arbitrary array application is proposed. The arbitrary array manifold is approximately decomposed under the concept of manifold separation technique (MST) and a linear combination of the equal ...
Yujian Pan, Guo Qing Luo, Zhen Liao, Bengeng Cai, Min Yao   +4 more
doaj   +1 more source

Single-, Dual- and Triple-band Frequency Reconfigurable Antenna [PDF]

, 2014
The paper presents a frequency reconfigurable slot dipole antenna. The antenna is capable of being switched between single-band, dual-band or triple-band operation.
Hamid, M. R., Idris, I. H., Jamaluddin, M. H., Kelly, J. R., Majid, H. A., Rahim, M. K. A.   +5 more
core   +1 more source

Accelerating Discovery to Deployment: Argonne's Materials Engineering Research Facility (MERF) and Its Role in Scaling Materials Technologies for Water and Resource Solutions

Advanced Materials Technologies, EarlyView.
In this Perspective, we highlight the processing science and scale‐up capabilities of the Materials Engineering Research Facility (MERF) at the U.S. Department of Energy's Argonne National Laboratory, with an emphasis on practical solutions for sustainable water and critical resource recovery. We demonstrate how national laboratories bridge fundamental
Yuepeng Zhang, Bratin Sengupta, Xiaoao Shi, Haihui Pu, Jeffrey W. Elam, Gregory K. Krumdick, Jessica Durham Macholz, Allison Bennett Irion, Junhong Chen, Seth B. Darling   +9 more
wiley   +1 more source