Results 121 to 130 of about 110,697 (224)

Adapting Mixer Metamaterials With a Metasurface Absorber

IET Radar, Sonar & Navigation
ABSTRACT This paper presents an in‐depth study of mixer metasurfaces comprising a frequency‐selective surface (FSS) mixer layer and a secondary transmission line local oscillator (LO) layer. Through both simulation and experimental measurement, we demonstrate how an upconverted signal is maximised by optimising metamaterial design and
Bowe, D.A., Ford, K.L., Tennant, A.
openaire   +2 more sources

Improved microwave absorption of pyramidal absorber using metamaterial

, 2016
International audienceWe proposed and demonstrated a scheme to enhance and tune absorption properties of conventional microwave absorbing materials by metamaterials.
Laura Pometcu, Pometcu, L., Benzerga, Ratiba, Pouliguen, P., Gwenael Dun, Dun, G., Ratiba Benzerga, Sharaiha, A., Ala Sharaiha, Philippe Pouliguen   +9 more
core   +1 more source

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source

Hybrid graphene and iron-based multiband terahertz metamaterial absorber for sensing applications

Next Materials
Terahertz (THz) metamaterial absorbers have attracted significant attention for high-performance sensing applications due to their strong light–matter interaction and compact size.
Youssef Amraoui, Imane Halkhams, Rachid El Alami, Mohammed Ouazzani Jamil, Hassan Qjidaa   +4 more
doaj   +1 more source

A Compact Resistively Loaded Metamaterial Absorber for 2.4 GHz RF Energy Harvesting With Impedance‐Matched Rectifier Analysis

Advanced Electronic Materials, EarlyView.
A compact resistively loaded metamaterial absorber captures RF energy at 2.4 GHz and directs most of the accepted power to modeled loads. The resonant response is confirmed experimentally for the fabricated absorber, while an impedance‐matched rectifier is evaluated through simulation. The stage‐wise results distinguish absorber, rectifier, and cascade
Md. Murad Kabir Nipun, Md. Jahedul Islam
wiley   +1 more source

Multi-band metamaterial absorber topology for infrared frequency regime

, 2017
In this paper, a new multiband metamaterial absorber design is proposed and the numerical characterization is carried out. The design is composed of three layers with differently sized quadruplets in which the interaction among them causes the multiband ...
Mulla, Batuhan, Sabah, Cumali
core   +1 more source

Broadband Near‐Field Computational Microwave Imaging Enabled by Nonperiodic Dispersive Unit‐Cell Loading in a Passive Metasurface

Advanced Electronic Materials, EarlyView.
A compact passive engineered surface converts changes in microwave frequency into many distinct illumination patterns, allowing nearby objects to be imaged without mechanical scanning, active tuning, or a large antenna array. Operating from 18 to 28 GHz, the single‐port system uses measured field patterns to reconstruct metallic targets and distinguish
Mohammed H. Arif, Firas Slewa Dawod, Henrik Jansen, Caner Kadıoğlu, Sayan Roy, Dirk Heberling, Renato Negra   +6 more
wiley   +1 more source

Evolution of Physical Intelligence Across Scales

Advanced Intelligent Discovery, EarlyView.
By following the evolution of physical intelligence across scales, this article shows how intelligence arises from materials, structures, physical interactions, and collectives. It establishes physical intelligence as the evolutionary foundation upon which embodied intelligence is built.
Ke Liu, Tianyun Huang, Aming Li, Pengyu Lv, Tingting Qin, Wenhui Chen, Hui Wei, Huiling Duan   +7 more
wiley   +1 more source

Explaining the Origin of Negative Poisson's Ratio in Amorphous Networks With Machine Learning

Advanced Intelligent Discovery, EarlyView.
This review summarizes how machine learning (ML) breaks the “vicious cycle” in designing auxetic amorphous networks. By transitioning from traditional “black‐box” optimization to an interpretable “AI‐Physics” closed‐loop paradigm, ML is shown to not only discover highly optimized structures—such as all‐convex polygon networks—but also unveil hidden ...
Shengyu Lu, Xiangying Shen
wiley   +1 more source

POLARIZATION-INDEPENDENT METAMATERIAL BASED DUAL BAND ABSORBER FOR STEALTH APPLICATIONS IN MICROWAVE BANDS

Electrica, 2016
Metamaterials have drawn a great attention in recent years because of their unnatural electromagnetic properties such as backward wave propagation, negative refractive index and phase velocity. Therefore, they introduce a different perspective on lenses,
Kadir OZDEN, Ahmet OZER, O.Mert YUCEDAG, Hasan KOCER   +3 more
doaj   +2 more sources