Results 31 to 40 of about 3,149 (257)

A tri-hybrid of Al2O3-SiO2-MgZrO3 stair shaped half-cylindrical dielectric resonator antenna (SHCDRA) for wideband wireless communication systems

Engineering Science and Technology, an International Journal, 2022
A novel wideband hybrid dielectric resonator antenna (DRA) made up of three heterogeneous layers of dielectric materials stacked on a rectangular slot patch is proposed in this paper.
Mohamad Faiz Mohamed Omar, Ihsan Ahmad Zubir, Shahanawaz Kamal, Mohd Fadzil Ain   +3 more
doaj   +1 more source

Complex WGM frequencies of gyroelectric cylindrical resonators

IET Microwaves, Antennas & Propagation, 2021
Asymptotic closed‐form expressions for calculating complex transverse electric (TE)/transverse magnetic (TM) whispering gallery mode (WGM) frequencies in homogeneous gyroelectric circular cylindrical resonators of infinite length are derived. In addition,
Konstantinos Katsinos, Grigorios P. Zouros, Georgios D. Kolezas, Gerasimos K. Pagiatakis, John A. Roumeliotis   +4 more
doaj   +1 more source

Rotations of Cylindrical Dielectric Resonators in a Rectangular Waveguide

Vìsnik Nacìonalʹnogo Tehnìčnogo Unìversitetu Ukraïni Kììvsʹkij Polìtehnìčnij Ìnstitut: Serìâ Radìotehnìka, Radìoaparatobuduvannâ, 2021
The coupling coefficients of cylindrical dielectric resonators with a regular rectangular waveguide under the condition their axes rotation are calculated. The dependences of the coupling coefficients on the angles of rotation and transverse coordinates
A. A. Trubin
doaj   +1 more source

Computing resonant modes of circular cylindrical resonators by vertical mode expansions [PDF]

Physical Review E, 2019
Open subwavelength cylindrical resonators of finite height are widely used in various photonics applications. Circular cylindrical resonators are particularly important in nanophotonics, since they are relatively easy to fabricate and can be designed to exhibit different resonance effects.
Hualiang Shi, Ya Yan Lu
openaire   +3 more sources

Hybrid Dielectric Resonator Antenna Composed of High-Permittivity Dielectric Resonator for Wireless Communications in WLAN and WiMAX

International Journal of Antennas and Propagation, 2012
The-hybrid dielectric resonator antenna consisted of a cylindrical high-permittivity dielectric resonator, a rectangular slot, and two-rectangular patches were implemented. The hybrid dielectric resonator antenna had three resonant frequencies. The lower,
Yih-Chien Chen
doaj   +1 more source

Cylindrical laser resonators*

Journal of the Optical Society of America, 1973
The properties of an improved class of lasers is presented. In one configuration of these lasers the radiation propagates radially within the amplifying medium, resulting in high fields and symmetric illumination at the resonator axis. Thus there is a strong focusing of energy at the axis of the resonator.
openaire   +2 more sources

Increasing the Insertion Loss of Sonic Crystal Noise Barriers with Helmholtz Resonators

Applied Sciences, 2023
Helmholtz resonators (HRs) have the advantage of extending and improving their insulating capacity when used as scatterers in noise barriers made of periodic media, such as sonic crystals (SCs).
Javier Redondo, David Ramírez-Solana, Rubén Picó   +2 more
doaj   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer

Advanced Functional Materials, EarlyView.
Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero, Meghna Jha, Elsa Veronica Flores‐Vela, Joost Kimpel, Andreas Schaefer, Jiali Guo, Jesika Asatryan, Alberto Peinador Veiga, Shuichi Haraguchi, Per‐Anders Carlsson, Jaime Martín, Mariano Campoy‐Quiles, Christian Müller   +12 more
wiley   +1 more source

Vortex modes in acoustofluidic cylindrical resonators

Journal of Fluid Mechanics
This paper presents a theoretical investigation of vortex modes in acoustofluidic cylindrical resonators with rigid boundaries and viscous fluids. By solving the Helmholtz equation for linear pressure, incorporating boundary conditions that account for no-slip surfaces and vortex and non-vortex excitation at the base, we analyse both single- and dual ...
Alisson da Silva Marques, Glauber Tomaz da Silva   +1 more
openaire   +3 more sources