Results 41 to 50 of about 16,741 (297)

Resonant hemispherical dielectric antenna

Electronics Letters, 1984
An antenna consisting of a resonant dielectric hemisphere on top of a ground plane is investigated. Calculations of the internal and external fields are made with emphasis on the lowest-order mode that results in efficient radiation in the direction perpendicular to the ground plane.
M.W. McAllister, S.A. Long
openaire   +1 more source

Rational Fine‐Tuning of MOF Pore Metrics: Enhanced SO2 Capture and Sensing with Optimal Multi‐Site Interactions

Advanced Functional Materials, EarlyView.
A pore tuning strategy to amplify the multi‐site MOF‐SO2 interactions is proposed to achieve an enhanced trace SO2 capture and chemiresistive sensing in highly stable isostructural DMOFs by annelating benzene rings. This work provides a facile strategy to achieve tailor‐made stable MOF materials for specific multifunctional applications.
Shanghua Xing, Abdulrahman Mohabbat, István Boldog, Jens Möllmer, Marcus Lange, Yulyan Haiduk, Tobias Heinen, Vladimir Pankov, Oliver Weingart, Christoph Janiak   +9 more
wiley   +1 more source

Wristwatch-Style Wearable Dielectric Resonator Antennas for Applications on Limps

IEEE Access, 2020
A wristwatch-style wearable dielectric resonator antenna (DRA) is proposed for the 2.45-GHz ISM band and sub-6 GHz 5G NR bands around 2.5 GHz, such as the commercial band for China Mobile Communications Corporation.
Ma Boyuan, Jin Pan, Enhao Wang, Deqiang Yang   +3 more
doaj   +1 more source

Magnetoquasistatic resonances of small dielectric objects [PDF]

, 2019
A small dielectric object with positive permittivity may resonate when the free-space wavelength is large in comparison with the object dimensions if the permittivity is sufficiently high.
Forestiere, Carlo, Miano, Giovanni, Pascale, Mariano, Rubinacci, Guglielmo, Tamburrino, Antonello, Tricarico, Roberto, Ventre, Salvatore   +6 more
core   +3 more sources

Tuning the Dielectric Properties of Individual Clay Nanosheets by Interlayer Composition: Toward Nano‐Electret Materials

Advanced Functional Materials, EarlyView.
The dielectric properties of clays are studied on the level of individual monolayers and functional double stacks. The material breakdown characteristics and charge storage performance are analyzed. For illustration, a defined charge pattern representing a cuneiform character is produced, written into a microscopic clay tile, referencing the origins of
Sebastian Gödrich, Paul Markus, Matthias Stöter, Bernhard Biersack, Rainer Schobert, Josef Breu, Georg Papastavrou   +6 more
wiley   +1 more source

Low-profile miniaturized dielectric resonator array antenna design for frequency division duplex based on sequential rotation method

Frontiers in Physics
IntroductionThe antenna must adhere to more stringent requirements, including multi-band operation, high performance, and compact design, since it is the primary component of satellite communication systems.
Mohd Aliff Afira Sani, Nor Samsiah Sani, Michal Prauzek, Jaromir Konecny, Hung Tran-Huy, Trang Hoang-Thu, Iyas Qaddara, Heba G. Mohamed, Darius Andriukaitis   +8 more
doaj   +1 more source

Miniaturized Conformal Arc Dielectric Resonator Antennas Using Dielectric and Metallic Loading

IEEE Access, 2019
Compact arc-shaped conformal dielectric resonator antennas (DRAs) loaded by metal plates and high-dielectric-constant (HiK) patches are investigated. Their miniaturizing principles are analyzed from different aspects.
Ma Boyuan, Jin Pan, Enhao Wang, Deqiang Yang   +3 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

Electromagnetic radiation by antennas of arbitrary shape in a layered spherical media [PDF]

, 2009
A unified method of moments model is developed for the analysis of arbitrarily shaped antennas that are radiating next to a multilayered dielectric sphere.
Khamas, S.K.
core   +1 more source

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