Results 11 to 20 of about 40,326 (144)

Cylindrical Resonator Sectorally Filled With DNG Metamaterial and Excited by a Line Source [PDF]

, 2012
A circular cylindrical resonator with metallic walls is analyzed in the phasor domain. The resonator contains a wedge of double-negative (DNG) metamaterial that is anti-isorefractive to the double-positive (DPS) material filling the remaining volume of ...
Graglia, Roberto, Uslenghi, P.L.E., Uslenghi P. L. E., Lombardi, Guido, Daniele, Vito   +4 more
core   +1 more source

Research on Low-Frequency Noise Control Based on Fractal Coiled Acoustic Metamaterials

Shock and Vibration, 2022
In this paper, a self-similar fractal coiled acoustic metamaterial is designed for the low-frequency noise control problem by combining a perforated plate and a coiled back cavity structure.
Hongyu Cui, Chengtao Liu, Haoming Hu
doaj   +1 more source

Investigation of frequency-dependent permittivity tunability of P(VDF-TrFE) metal-ferroelectric-metal capacitor

Results in Physics, 2019
We report on the tunability of the frequency-dependent permittivity of a metal-ferroelectric-metal (MFM) capacitor fabricated with P(VDF-TrFE), an organic ferroelectric material.
S.-W. Han, C.-H. Lee, H. Shin, J.-H. Lee, H.-Y. Cha   +4 more
doaj   +1 more source

Development of diverse coding metamaterial structure for radar cross section reduction applications

Scientific Reports, 2022
Despite their widespread use for performing advanced electromagnetic properties, metamaterial suffers from several restrictions in this technological era.
Tayaallen Ramachandran, Mohammad Rashed Iqbal Faruque, Mohammad Tariqul Islam, Mayeen Uddin Khandaker, K. S. Al-mugren   +4 more
doaj   +1 more source

Quantum master equation for coupling mechanism of metamaterial

Results in Physics, 2022
In this paper, we present a full quantum description for coupling mechanism of the metamaterial. We start the derivation from quantum master equation to fit the spectrum of THz metamaterial. Therefore we can employ the quantum master equation to describe
Wei Huang, Songyi Liu, Shiting Cao, Chu Guo, Shan Yin, Xinwei Du, Wentao Zhang   +6 more
doaj   +1 more source

Electrically tunable harmonics in time-modulated metasurfaces for wavefront engineering

New Journal of Physics, 2018
Modulation of metasurfaces in time gives rise to several exotic space–time scattering phenomena by breaking the reciprocity constraint and generation of higher-order frequency harmonics. We introduce a new design paradigm for time-modulated metasurfaces,
Mohammad Mahdi Salary, Samad Jafar-Zanjani, Hossein Mosallaei   +2 more
doaj   +1 more source

Metamaterial Mediated Inverse Cherenkov Acceleration [PDF]

, 2010
In this paper we ex­am­ine the ef­fect of in­tro­duc­ing an Elec­tro­mag­net­ic meta­ma­te­ri­al into a Trav­el­ling Wave struc­ture to me­di­ate in­verse Cherenkov ac­cel­er­a­tion.
Tan, Y.S., Seviour, Rebecca
core   +3 more sources

Highly tunable low frequency metamaterial cavity for vibration localization

Scientific Reports, 2022
Metamaterial cavity has gathered much attention recently due to its capability of localizing vibration energy. Despite the active research, however, there are still big technical challenges not solved yet.
Hong Woo Park, Hong Min Seung, Wonjae Choi, Miso Kim, Joo Hwan Oh   +4 more
doaj   +1 more source

A Novel Method for Enhancement of Gain Bandwidth of a Hybrid 3-State Reconfigurable Reflectarray Metasurface Antenna [PDF]

Journal of Electromagnetic Engineering and Science
This paper proposes a novel method for enhancing the gain bandwidth of hybrid 3-state reconfigurable reflectarray metasurface antennas (RRMAs) containing passive unit cells.
Yong-Hyun Nam, Jeong-Hae Lee
doaj   +1 more source

A Comparative Study and Analysis of Layered-Beam and Single-Beam Metamaterial Structures: Transmissibility Bandgap Development

Applied Sciences, 2022
Recently, layered-beam metamaterial structures have been gaining popularity in a variety of engineering applications including energy harvesting and vibration isolation.
Winner Anigbogu, Hamzeh Bardaweel
doaj   +1 more source