Results 121 to 130 of about 3,338 (308)
Wireless power transmission in concrete using cylindrical dielectric resonator antennas
, 2018 This paper investigates the capability of wireless power transmission (WPT) in a concrete medium using Cylindrical Dielectric Resonator Antennas (CDRAs).
Ranjith Liyanapathirana +5 more
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Light Switchable Ionic Conductivity of Arylazopyrazole Modified Polysiloxanes
Advanced Materials Technologies, EarlyView.We present a polysiloxane functionalized with a novel arylazopyrazole dye that undergoes reversible photoisomerization. Upon lithium bis(trifluoromethanesulfonyl)imide addition and UV irradiation, the polymer exhibits a shift in tan(d) toward higher frequencies and enhanced ionic conductivity.
Malte S. Beccard +7 more
wiley +1 more source
Dielectric Resonator Nanoantenna Array For Optical Frequencies
, 2015 A dielectric resonator nanoantenna array is numerically investigated. The study was carried out by using the FIT- finite integration technique. The results show a promising alternative for coupling external beams to plasmonic waveguides.
Hernandez-Figueroa H.E. +1 more
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Advanced Materials Technologies, EarlyView.This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane +4 more
wiley +1 more source
Microwave dual-band dielectric resonator antennas.
, 2018 Este trabalho visou ao desenvolvimento de antenas de ressoador dielétrico de banda dupla em frequências de micro-ondas por meio do estabelecimento de uma metodologia de projeto para as mesmas e da proposição de configurações inéditas de antenas desse ...
Seko, Murilo Hiroaki
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Advanced Materials Technologies, EarlyView.Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu +8 more
wiley +1 more source
IET Microwaves, Antennas & PropagationThe design of three‐dimensional (3D)‐printed heterogeneous ceramics exhibiting isotropic and anisotropic dielectric permittivities at microwave frequencies is studied for dielectric resonator antenna (DRA) applications.
Bruno deAraùjo +5 more
doaj +1 more source
, 2002 Aperture coupled dielectric resonator antennas (DRAs) that reside above a layered background are analyzed using the method of moments (MoM). Dyadic Green's functions for the layered medium are derived in a simple and effective manner and Rao-Wilton ...
Michielssen, E, Liu, Z, Chew, WC
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Additively Manufactured Porous Ceramics as Tunable Dielectrics for Passive Temperature Sensing
Advanced Materials Technologies, EarlyView.Porous ceramic lattices, 3D‐printed from a multicomponent oxide ink, are integrated with LC resonators for passive wireless temperature sensing. By tuning porosity, the dielectric properties and RF response are engineered to produce distinct resonant frequency shifts with temperature. The results establish a structure‐driven approach to customizing the
Sogol Heidarishahrivar +5 more
wiley +1 more source
Design of Broadband and Multiband Dielectric Resonator Antennas
, 2007 本論文主要是設計寬頻及多頻介質共振器天線，可應用於寬頻無線通訊系統。 在此論文中，我們在介質共振器內插入一空隙，以增強電場強度，提高輻射效率，而使頻寬增加。或挖一溝槽，擾動原本的電磁場分佈，降低共振器之品質因子，而達到寬頻的效果。利用此概念設計一雙頻介質共振器天線，可符合WiMAX與WLAN之規格。 在此論文中，我們也設計一介質共振器天線，使共振器之TEy111、TEy112、與TEy113的共振頻率互相靠近，利用孔隙耦合的方式饋入，以結合三個共振頻帶而達到寬頻的效果，並在介質共振器內部挖一溝槽 ...
張子軒, Chang, Tze-Hsuan
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