Results 91 to 100 of about 34,611 (261)

Composite GPS Patch Antenna for the AR Bandwidth Enhancement

International Journal of Antennas and Propagation, 2016
A composite Global Positioning System (GPS) patch antenna with a quadrature 3 dB hybrid coupler was designed and implemented for working RHCP and had a broadband axial ratio (AR) bandwidth.
Minkil Park, Wonhee Lee, Taeho Son
doaj   +1 more source

Plasmon‐Enhanced Second‐Harmonic Generation in Atomically Thin Crystalline Silver Nanostructures

Advanced Materials, EarlyView.
Atomically thin crystalline silver films combine vertical quantum confinement with lateral plasmonic field enhancement to boost second‐harmonic generation. Nanoribbon and nanotriangle arrays enable geometry‐tunable infrared plasmon resonances, producing strong SHG from deeply subwavelength metallic volumes compatible with silicon‐based nanophotonics ...
Saad Abdullah, Philipp K. Jenke, Andrew P. Weber, Álvaro Rodríguez Echarri, Vahagn Mkhitaryan, Fadil Iyikanat, Frederik Schiller, Philip Walther, J. Enrique Ortega, Lee A. Rozema, F. Javier García de Abajo   +10 more
wiley   +1 more source

Circular microstrip antenna with defected ground structure for bandwidth enhancement at 2.4 GHz

Journal Geuthee of Engineering and Energy
This study proposes an optimized circular microstrip patch antenna integrated with a stepped-slot Defected Ground Structure (DGS) for 2.4 GHz WLAN applications.
Muhammad Nur Fadly, Deri Latika Herda, Popy Maria   +2 more
doaj   +1 more source

Helicity‐Defined Analog Conductance States in Chiral Perovskite Synapses

Advanced Materials, EarlyView.
Chiral perovskite synapses convert the handedness of circularly polarized light into persistent analog memory during electrical programming. An optimized n = 3 structure combines strong helicity selectivity with low read noise, enabling 72 distinct conductance levels.
Min Jong Lee, Hyoungwook Cho, Sang Heon Lee, Ohhyun Kwon, Minil Kang, Dong Gyu Lee, Seongwon Lee, Tae Kyung Lee, Gyeong Min Lee, Minseong Um, Sung Su Yoon, Gayoung Ham, Hyojung Cha, Hyungju Ahn, SungWoo Nam, Hyung‐Min Lee, Jae Won Shim   +16 more
wiley   +1 more source

Demagnetization‐Driven Nanoscale Chirality‐Selective Phonon Transport

Advanced Materials, EarlyView.
Chiral heat flow is switched in a ferromagnet/chiral α‐SiO2 heterostructure by controlling the angular momentum of demagnetization‐driven chiral phonons. When phonon handedness matches the crystal chirality, nanoscale thermal transport is enhanced; the opposite handedness suppresses transport, establishing a magnetization‐tunable chiral phonon diode ...
In Hyeok Choi, Daeheon Kim, Yeon Jong Jin, Seungmo Yang, Tae‐Seong Ju, Changsoo Kim, Chanyong Hwang, Dongbin Shin, Jong Seok Lee   +8 more
wiley   +1 more source

Extending the Frequency Bandwidth of a Tristable Electromagnetic Energy Harvester Through the Use of Stoppers

Energies
This study investigated a nonlinear tristable electromagnetic vibration energy harvester enhanced with adjustable mechanical stoppers. The stoppers were designed to limit yoke displacement and prevent sticking in the outer stable positions.
Marcin Kulik, Rafał Gabor
doaj   +1 more source

Robust Spin Splitting and Fermiology in the Layered Altermagnet CoNb4${\rm CoNb}_4$Se8${\rm Se}_8$

Advanced Materials, EarlyView.
The emergence of an altermagnetic phase is demonstrated in the cobalt‐intercalated superconducting 2H‐NbSe2 polymorph. A combined theoretical and experimental approach directly probes the magnetism, the altermagnetic lifting of Kramers degeneracy, and the electronic phase space, establishing CoNb4Se8 as the first g‐wave altermagnetic layered material ...
Alessandro De Vita, Chiara Bigi, Davide Romanin, Matthew D. Watson, Vincent Polewczyk, Marta Zonno, François Bertran, Pietro M. Forcella, My Bang Petersen, Federico Motti, Giovanni Vinai, Manuel Tuniz, Federico Cilento, Mario Cuoco, Brian M. Andersen, Andreas Kreisel, Luciano Jacopo D'Onofrio, Oliver J. Clark, Mark T. Edmonds, Christopher Candelora, Muxian Xu, Siyu Cheng, Alexander LaFleur, Tommaso Antonelli, Giorgio Sangiovanni, Lorenzo Del Re, Ivana Vobornik, Jun Fujii, Fabio Miletto Granozio, Alessia Sambri, Emiliano Di Gennaro, Jeppe B. Jacobsen, Henrik Jacobsen, Iulia Cojocariu, Marcin Szpytma, Andrea Locatelli, Tevfik Mentes, Won Seop Song, Jun Sung Kim, Matthieu Jamet, Jean‐François Jacquot, Pasquale Orgiani, Ralph Ernstorfer, Ilija Zeljkovic, Younghun Hwang, Matteo Calandra, Jill A. Miwa, Federico Mazzola   +47 more
wiley   +1 more source

MULTILAYER MICROSTRIP ANTENNA QUALITY FACTOR OPTIMIZATION FOR BANDWIDTH ENHANCEMENT [PDF]

Journal of Engineering Science and Technology, 2012
The impedance bandwidth, one of the important characteristics of microstrip patch antennas, can be significantly improved by using a multilayer dielectric configuration.
M.C. SRIVASTAVA, SAMIR DEV GUPTA
doaj  

Advances in Bio‐Integrated Edge Computing Systems for Smart and Connected Health

Advanced Materials, EarlyView.
This review explores advances in bio‐integrated edge computing for healthcare, focusing on co‐designing computing, sensing, and energy strategies to overcome integration and power challenges for optimized, decentralized operation. ABSTRACT Recent advances in bio‐integrated healthcare technologies have enabled continuous, high‐resolution monitoring and ...
Gyuwon Kim, Seungwon Yoo, Tae Woog Kang, Yunuo Huang, Woon‐Hong Yeo   +4 more
wiley   +1 more source

Wafer‐Scale Direct Growth of Ultraclean Monolayer Amorphous Carbon on c‐Sapphire by Remote Catalytic Dehydrogenation

Advanced Materials, EarlyView.
Remote catalytic dehydrogenation enables the direct growth of monolayer amorphous carbon on a 2‐inch sapphire wafer by thermal CVD. Spatial separation of the catalyst from the growth substrate eliminates metallic residue and post‐growth processing, yielding a wafer‐scale uniform film with a random polygonal sp2‐hybridized carbon network that exhibits ...
Muhammad Sabbtain Abbas, Imhwan Kim, Seokje Lee, Yasir Hassan, Jihwan Kim, Eunsu Lee, Han Ik Kim, Yoonkang Kim, Gyu‐Chul Yi   +8 more
wiley   +1 more source