Results 41 to 50 of about 33,091 (311)

Microwave modes of ambidextrous helices

Scientific Reports
This work presents an investigation into the electromagnetic properties of ambidextrous helices, structures composed of equal numbers of left- and right-handed turns, operating in the gigahertz frequency range.
J. Gudge-Brooke, N. Clow, A. P. Hibbins, A. W. Powell, J. R. Sambles   +4 more
doaj   +1 more source

Emulation of metamaterial waveguides

Algerian Journal of Signals and Systems, 2018
In this work, we are interested by emulating metamaterial microwave waveguides which behave like conventional metallic ones. We use metamaterial layers based on two types of unit cells.
Khedidja BOURAS, Abdelhadi LABIAD, Chaker SALEH, Mouloud BOUZOUAD   +3 more
doaj   +1 more source

Estimating number of group targets arranged in linear array via forward‐backward matrix pencil method

IET Radar, Sonar & Navigation, 2023
An efficient number estimation method is proposed for target detection by using the forward‐backward matrix pencil method. Compared with the traditional parameter estimation methods, the proposed method can work well even for sparse signals.
Xiyuan Sun, Shixi Li, Pengfei Gu, Zi He, Dazhi Ding, Shaoqing Guo, You Li   +6 more
doaj   +1 more source

Tunable Electromagnetically Induced Transparent Window of Terahertz Metamaterials and Its Sensing Performance

Applied Sciences, 2022
The electromagnetically induced transparency effect of terahertz metamaterials exhibits excellent modulation and sensing properties, and it is critical to investigate the modulation effect of the transparent window by optimizing structural parameters. In
Zhenlin Wu, Peiyao An, Menghan Ding, Yanan Qi, Lin Zhang, Shaoshuai Han, Di Lian, Changming Chen, Xin Yang   +8 more
doaj   +1 more source

Ballistic metamaterials

Optica, 2020
We report the theoretical prediction and experimental realization of the optical phenomenon of “ballistic resonance.” This resonance, resulting from the interplay between free charge motion in confining geometries and periodic driving electromagnetic fields, can be utilized to achieve negative permittivity at frequencies well above the bulk plasma ...
Kun Li, Evan Simmons, Andrew F. Briggs, Seth R. Bank, Daniel Wasserman, Viktor A. Podolskiy, Evgenii E. Narimanov   +6 more
openaire   +2 more sources

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

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, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Zero electromagnetic coupling of closely spaced identical helical resonators

Scientific Reports
The interaction between closely spaced elements in an electromagnetic array typically leads to significant inter-element coupling, altering the resonance properties of each element.
J. Gudge-Brooke, N. Clow, A. P. Hibbins, A. W. Powell, J. R. Sambles   +4 more
doaj   +1 more source

Structural design and optimization of double-cross shape broadband absorption metamaterial based on CB-ABS

Frontiers in Materials, 2022
This work presents a novel broadband double-cross shape metamaterial structure based on the Carbon Black-Acrylonitrile-Butadiene-Styrene (CB-ABS) composite material.
Mengzhou Chen, Liuying Wang, Gu Liu, Chaoqun Ge, Long Wang, Kejun Xu, Weichao Wang   +6 more
doaj   +1 more source

Evaluating Energy Absorption Performance of Filled Lattice Structures

Advanced Engineering Materials, EarlyView.
Maximum stress must be considered to robustly evaluate energy absorber designs. This approach was applied to compare all types of absorbers in a single Ashby diagram and determine the utility of filling lattice voids with a second material. High‐performance fillers can improve the performance of lattices that are limited by buckling or catastrophic ...
Christian Bonney, William P. King, Iwona Jasiuk   +2 more
wiley   +1 more source

Nonlocal phase-change metaoptics for reconfigurable nonvolatile image processing

Light: Science & Applications
The next generation of smart imaging and vision systems will require compact and tunable optical computing hardware to perform high-speed and low-power image processing.
Guoce Yang, Mengyun Wang, June Sang Lee, Nikolaos Farmakidis, Joe Shields, Carlota Ruiz de Galarreta, Stuart Kendall, Jacopo Bertolotti, Andriy Moskalenko, Kairan Huang, Andrea Alù, C. David Wright, Harish Bhaskaran   +12 more
doaj   +1 more source