Results 31 to 40 of about 1,490 (262)
Applied Sciences, 2017 Recently, high frequency bands (above 6 GHz) have attracted more attention for the next generation communication systems due to the limited frequency resources below 6 GHz.
Xin Zhou +7 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Here, we provide the reader with the current state of the art in the fabrication of high‐T2‐coherence diamond, optimized through the use of double electron–electron resonance (DEER) spectroscopy. We reveal the main as well as yet unidentified spin defects, the reduction of which is essential for reducing the spin bath and fabricating materials for ...
Olga Rubinas +6 more
wiley +1 more source
Archives of AcousticsThe article presents the results of comparative studies concerning the efficiency of systems aimed at minimising the acoustic nuisance of noise generated by the railway vehicle movement.
Grzegorz KLEKOT +3 more
doaj +1 more source
Wearable Kirigami‐Apertured Capacitive Sensors for Continuous Cardiac Volumetric Monitoring
Advanced Functional Materials, EarlyView.A wearable kirigami‐apertured carbon nanotube‐paper composite (K‐CPC) capacitive sensor enables cardiac volumetric monitoring. The kirigami process creates a central aperture with cantilevered fibers that confine the electric field, enhancing both sensitivity and lateral resolution.
Yu‐Jen Cheng +4 more
wiley +1 more source
A Novel Mode-Stirred Reverberation Chamber Design for 5G Millimeter Wave Bands
IEEE Access, 2021 A novel mode-stirred reverberation chamber (RC) is designed and analyzed for millimeter wave bands. The size of the proposed RC with dimensions of 0.9 m × 0.9 m × 1.1 m is suitable for user equipment (UE) tests.
Zhiqin Wang +4 more
doaj +1 more source
The study of the effectiveness of sound insulation of gypsum wall boards with “Shimast” coating [PDF]
MATEC Web of Conferences, 2020 The article presents the experimental studies of sound insulation of a single-layer barrier made of gypsum wall boards with a thin-layer coating. The coating consists of a viscous base and glass airless microgranules. The coating increases the efficiency
Totunov Semen +2 more
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Advanced Materials, EarlyView.This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau +9 more
wiley +1 more source
Impacts of Absorber Loadings on Simulating the Multipath Channel in a Reverberation Chamber
International Journal of Antennas and Propagation, 2017 In reverberation chambers, the multipath channels with different delay characteristics can be generated by loading the chamber with different amounts of absorbers.
Xin Zhou +7 more
doaj +1 more source
On the Evaluation of the Shielding Effectiveness of Electrically Large Enclosure
Advanced Electromagnetics, 2012 The shielding effectiveness (SE) has become afundamental step in testing active or passive electricdevices. The Reverberating Chamber (RC) is a wellestablishedmethod for determining the SE since has theadvantage to expose the material to a more ...
A. Gifuni +6 more
doaj +1 more source
Acoustic tests of type KPF1 high-pressure external gear pumps
Technical Transactions, 2020 This article presents the results of testing the sound pressure level and sound power level of the experimental 3PW-KPF1-24-40-2-776 high-pressure gear pump. Acoustic tests were conducted in an reverberation chamber.
Osiński Piotr +3 more
doaj +1 more source