Results 101 to 110 of about 33,663 (265)

Ascertaining Operating Points of Harmonic Transponders Using Intermodulation Responses

IEEE Open Journal of Antennas and Propagation
Harmonic transponders are nonlinear, passive devices that typically receive an interrogation signal at one single frequency and reradiate harmonics. In this work, we propose leveraging the device’s nonlinearity by interrogating with two closely ...
Jeff Frolik, Elsie Anthonio, Rye Fought, Tara Harte   +3 more
doaj   +1 more source

Multi‐Channel Electrically Tunable Varifocal Metalens With Compact Multilayer Polarization‐Dependent Metasurfaces and Liquid Crystals

Advanced Science, EarlyView.
A compact eight‐channel electrically tunable varifocal metalens with three single‐layer polarization‐multiplexed bi‐focal metalens and three LC cells. The total thickness of the device is ∼6 mm, while the focal lengths can be switched among eight values (3.6, 4.2, 4.5, 4.9, 6.2, 6.9, 8.4, and 9.6 mm). ABSTRACT As an essential module of optical systems,
Zhiyao Ma, Yize Liu, Zhe Li, Tian Tian, Yuxuan Liao, Xue Feng, Yongzhuo Li, Kaiyu Cui, Fang Liu, Hao Sun, Wei Zhang, Yidong Huang   +11 more
wiley   +1 more source

Tunable High‐Performance Metamaterial Filters Based on Novel SRR Architectures

Advanced Science, EarlyView.
Based on two novel SRR configurations and two independent SRR integration approaches, four tunable bandpass metamaterial filters were fabricated with an ultra‐thin ceramic substrate. Among them, SM‐2 achieves over 97% electromagnetic wave transmittance, with a minimal 1.15% deviation in its resonant frequency prediction, making them promising ...
Lingxi Qu, Liya Zheng, Ruopeng Liu, Chunlin Ji, Bin Li   +4 more
wiley   +1 more source

Stress‐to‐Light Conversion in an Earth‐Abundant Oxide Semiconductor

Advanced Science, EarlyView.
Stress‐to‐light conversion in solids represents a unique photonic functionality, yet it has never been realized in a chemically simple and sustainable material. Here, we show that sustainable semiconductor ZnO exhibits strong near‐infrared (NIR) luminescence under elastic stress when defect‐engineered to stabilize the p‐type state.
Tomoki Uchiyama, Koki Otonari, Reona Omori, Guangfa Yang, Eiji Nishibori, Ying Chen, Xu‐Guang Zheng, Chao‐Nan Xu   +7 more
wiley   +1 more source

Fluorescence Tuning of Carbon Dots from Red to Blue via UV‐Induced Photochemical Etching

Advanced Science, EarlyView.
A UV‐driven photochemical process enables continuous color evolution of carbon dots from red to blue using a single irradiation parameter. Progressive photoetching restructures graphitic domains and surface states, allowing full visible‐spectrum emission control.
Nanzhi Zheng, Yuchen Yang, Jingwei Xu, Jincheng Gan, Yinuo An, Xinyu Li, Guohua Chen   +6 more
wiley   +1 more source

"Saturn" remains in orbit

Технологія та конструювання в електронній апаратурі, 2013
The article is dedicated to scientific and production enterprise "Saturn" — since its foundation up to the present day. The authors describe the determining stages of its development and its team’s scientific and technological achievements over the 45 ...
V. M. Chmil, E. N. Glushechenko
doaj  

Modular wave digital approach: methodology review and application on Wilkinson-type power dividers

Cogent Engineering
Wave digital (WD) filter theory represents a powerful approach for modeling various physical systems. The WD framework, based on this theory, offers the ability to create digital models of planar microstrip circuits.
Biljana P. Stošić, Marin Nedelchev, Zlatica Marinković   +2 more
doaj   +1 more source

Garnets for Microwave Devices.

Journal of the Japan Society of Powder and Powder Metallurgy, 1996
The magnetic characterirtics and ferromagnetic resonance linewidth of garnet system {Gdz-Y3-2x-zCa2X}[Fe2-ylny](Fe3-xVx)O12 was investigated as function of x, y, and z. 4 π Ms temperature stability depends on Tmax strongly. Putting Tmax to around 20C, 4 π Ms temperature coefficient α will be as low as 0.05% / °C. In this system, ferromagnetic resonance
openaire   +2 more sources

Enhancing Biogenic Formic Acid Production in the Modified OxFA Process by Acetonitrile Addition

Advanced Science, EarlyView.
In this study, the beneficial effect of using acetonitrile as a co‐solvent in the modified OxFA process is shown, outperforming methanol, demonstrating improved reaction kinetics combined with high selectivity for the HPA‐2 (H5PV2Mo10O40) catalyzed oxidation of xylose to FA.
Jan‐Dominik H. Krueger, Pegah Saedi, Maximilian J. Poller, Alberto Collauto, Jason P. Hallett, David Robinson, Maxie M. Roessler, Jakob Albert   +7 more
wiley   +1 more source

Fabrication of Microwave Devices Based on Magnetic Nanowires Using a Laser-Assisted Process. [PDF]

Micromachines (Basel), 2019
Van Kerckhoven V, Piraux L, Huynen I.
europepmc   +1 more source