Results 61 to 70 of about 155,552 (273)
Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
A Metamaterial-Based Cross-Polarization Converter Characterized by Wideband and High Efficiency
Crystals, 2022 Metamaterial-based polarization converters, which have all kinds of polarizations realizable via adjusting metamaterial parameters, have been springing up at an increasing rate. However, the reported metamaterial-based polarization converters suffer from
Yannan Jiang +4 more
doaj +1 more source
Wideband Waveform Design for Robust Target Detection
, 2014 Future radar systems are expected to use waveforms of a high bandwidth, where the main advantage is an improved range resolution. In this paper, a technique to design robust wideband waveforms for a Multiple-Input-Single-Output system is developed.
Panahi, Ashkan +2 more
core +1 more source
A wideband CPW ring power combiner with low insertion loss and high port isolation [PDF]
, 2012 In this paper we present a coplanar waveguide (CPW)-based ring power combiner that exhibits less than 0.8 dB insertion loss, better than 15 dB port match and higher than 22 dB isolation loss over the frequency range from 50 GHz to 100 GHz.
Cumming, D.R.S. +4 more
core +1 more source
Advanced Functional Materials, EarlyView.This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger +11 more
wiley +1 more source
Slanted-eye featured forbidden bands in a water channel with undulated sidewalls
Results in Physics, 2021 Resonances induced by structure periodicity can always lead to frequency gaps, which are forbidden bands of propagating waves. Besides the traditional Bragg gaps, non-Bragg gaps have been found in periodic waveguides for years, which have been proved to ...
Bo-Yang Ma +4 more
doaj +1 more source
Wideband VCO with high phase stability Patent [PDF]
, 1971 Wideband voltage controlled oscillator with high phase ...
Hearn, C. P.
core +1 more source
Cooperative wideband spectrum sensing with multi-bit hard decision in cognitive radio [PDF]
, 2013 Cognitive radio offers an increasingly attractive solution to overcome the underutilization problem. A sensor network based cooperative wideband spectrum sensing is proposed in this paper. The purpose of the sensor network is to determine the frequencies
Ammar, M. +4 more
core +2 more sources
Advanced Functional Materials, EarlyView.Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song +4 more
wiley +1 more source
Folded Chirp-Rate Shift Keying Modulation for LEO Satellite IoT
IEEE Access, 2019 In the low earth orbit (LEO) satellite Internet of Things (IoT), the IoT devices can be distributed in remote areas (e.g., desert, ocean, and forest) for some special applications, where they are unable to have direct terrestrial network accesses and can
Chao Yang +3 more
doaj +1 more source