Results 61 to 70 of about 24,215 (336)

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Dielectric Resonator Antenna Geometry-Dependent Performance Tradeoffs

IEEE Open Journal of Antennas and Propagation, 2021
A flexible shape generation technique (Surface Contour Shape Generation) is combined with multiobjective evolutionary optimization algorithms in order to synthesize geometrically-diverse dielectric resonator antennas and explore the impact geometry has ...
Eric B. Whiting, Sawyer D. Campbell, Galestan Mackertich-Sengerdy, Douglas H Werner   +3 more
doaj   +1 more source

Microstrip Patch Antennas Fed by Substrate Integrated Waveguide [PDF]

, 2013
Dizertační práce je zaměřena na výzkum mikropáskových flíčkových antén a anténních řad napájených vlnovodem integrovaným do substrátu (SIW). Využitím vlnovodu integrovaného do substrátu pro napájení mikropáskové flíčkové antény dochází ke kombinaci ...
Mikulášek, Tomáš
core  

Experimental Test of a Two-dimensional Approximation for Dielectric Microcavities

, 2009
Open dielectric resonators of different shapes are widely used for the manufacture of microlasers. A precise determination of their resonance frequencies and widths is crucial for their design. Most microlasers have a flat cylindrical geometry, and a two-
A. Richter, A. Richter, B. Dietz, C. Vassallo, F. Schäfer, H. C. Casey, H.-J. Stöckmann, J. D. Jackson, J. U. Nöckel, M. Janezic, M. Miski-Oglu, P. Oria Iriarte, S. Bittner   +12 more
core   +1 more source

Phase Change Material‐Driven Tunable Metasurface for Adaptive Terahertz Sensing and Communication in 6G Perceptive Networks

Advanced Functional Materials, EarlyView.
This study explores the benefits of metasurfaces made from functional materials, highlighting their ability to be adapted and improved for various high‐frequency applications, including communications and sensing. It first demonstrates the potential of these functional material‐based metasurfaces to advance the field of sub‐THz perceptive networks ...
Yat‐Sing To, Jiachen Du, Cyril Decroze, Laure Huitema, Aurelian Crunteanu, Hang Wong   +5 more
wiley   +1 more source

Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light

Advanced Functional Materials, EarlyView.
A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid, Demeng Feng, Pournima Narayanan, Justin S. Edwards, Manchen Hu, Emma Belliveau, Minjeong Kim, Shenwei Yin, Sanket Deshpande, Chenghao Wan, Linda Pucurimay, David A. Czaplewski, Daniel N. Congreve, Mikhail A. Kats   +13 more
wiley   +1 more source

A RECONFIGURABLE METASURFACE IN THE FORM OF A FABRY-PÉROT RESONATOR, INVOLVING SEMI-TRANSPARENT MIRRORS AND A NONLINEAR DIELECTRIC INSERT [PDF]

Radio Physics and Radio Astronomy
Subject and Purpose. The paper is aimed at suggesting ways for implementing electromagnetic devices that would involve a nonlinear dielectric inside the structure for concentrating electromagnetic field within it at relatively low intensities of the ...
Ye. O. Antonenko, Yu. V. Antonenko, A. V. Gribovsky, V. A. Katrich   +3 more
doaj   +1 more source

Experimental investigation of the effects of polarization on the measured radiation efficiency of a dielectric resonator antenna [PDF]

, 2008
©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any ...
Almpanis, G., Benedickter, H., Fumeaux, C., Lai, Q., Vahldieck, R.   +4 more
core   +1 more source

Dielectric Resonator Metasurface for Dispersion Engineering

, 2016
We introduce a practical dielectric metasurface design for microwave frequencies. The metasurface is made of an array of dielectric resonators held together by dielectric connections thus avoiding the need of a mechanical support in the form of a ...
Achouri, Karim, Caloz, Christophe, Gupta, Shulabh, Rmili, Hatem, Yahyaoui, Ali   +4 more
core   +1 more source

Embedded dielectric resonator antenna for bandwidthenhancement

Electronics Letters, 1997
A new embedded structure with an annular ring and a cylindrical dielectric resonator excited by means of a coaxial probe has been realised and investigated experimentally to obtain a large bandwidth enhancement. The return loss, radiation patterns, and antenna gain of this configuration are presented.
Sangiovanni, A., Dauvignac, Jean-Yves, Pichot, Christian   +2 more
openaire   +1 more source