Results 81 to 90 of about 241,717 (322)

A 2-D Fully Polarized Van Atta Array Based on Wide-Beam Tri-Polarized Antennas

Micromachines
This paper proposes a 2-D fully polarized Van Atta array, which consists of four tri-polarized antenna elements. The tri-polarized antenna element comprises a monopole antenna and a low-profile microstrip antenna that widens the beam by folding four ...
Jicheng Pan, Lei Chen, Shuangdi Zhao, Tianling Zhang   +3 more
doaj   +1 more source

Metamaterial Antennas Enhance MRI of the Eye and Occipital Brain

Advanced Materials, EarlyView.
A radiofrequency antenna platform comprising planar and bend configurations is developed, incorporating structurally integrated epsilon‐negative metamaterial unit cells to enhance MRI. These antennas enable high‐resolution in vivo human MRI of the eye, orbit, and occipital brain. Comprehensive validation, including simulations, phantom experiments, SAR,
Nandita Saha, Bilguun Nurzed, Mostafa Berangi, Andre Kuehne, Helmar Waiczies, Igor Fabian Tellez Ceja, Xiang Hu, Thomas Gladytz, Lisa Krenz, Dave Huebler, Beate Endemann, Claudia Brockmann, Ebba Beller, Oliver Stachs, Thoralf Niendorf   +14 more
wiley   +1 more source

High-Gain Miniaturized Ultrawideband Antipodal Vivaldi Antenna with Metamaterials

Micromachines
A compact high-gain antipodal Vivaldi antenna with ultra-wideband (UWB) performance ranging from 1 GHz to 25 GHz is proposed and demonstrated. The antenna features two sets of tapered exponential slots along the flare edges to enhance low-frequency ...
Wentao Zhang, Linqi Shi, Chenjie Zhao, Rui Yang   +3 more
doaj   +1 more source

Detection Performance of Noncoherent Radar: MIMO Radar, Phased Array Radar, Directional MIMO Radar

The Journal of Korean Institute of Communications and Information Sciences, 2011
In a traditional phased array radar, closely spaced antenna elements transmit a scaled version of single waveform to maximize the signal energy. On the contrary, a multiple-input multiple-output (MIMO) radar consists of widely separated antennas and transmits an arbitrary waveform from each antenna element.
Chan-Ho An, Jang-Hoon Yang, Ui-Young Pak, Young-Jae Ryu, Duk-Chan Han, Dong-Ku Kim   +5 more
openaire   +2 more sources

Recent Progress on Flexible Multimodal Sensors: Decoupling Strategies, Fabrication and Applications

Advanced Materials, EarlyView.
In this review, we establish a tripartite decoupling framework for flexible multimodal sensors, which elucidates the underlying principles of signal crosstalk and their solutions through material design, structural engineering, and AI algorithms. We also demonstrate its potential applications across environmental monitoring, health monitoring, human ...
Tao Wu, Yu‐Tao Li, Luyu Zhao, Yi Zhang, Zhaojie Zhang, Jian Yuan, Yiwen Wu, Anqi Che, Yuanxiao Ma, Yang Chai, Yeliang Wang   +10 more
wiley   +1 more source

Observation of edge solitons and transitions between them in a trimer circuit lattice

Communications Physics
In nonlinear topological systems, edge solitons either originate from linear topological edge modes or emerge as nonlinearity-induced localized states without topological protection.
Rujiang Li, Xiangyu Kong, Wencai Wang, Yixi Wang, Yongtao Jia, Huibin Tao, Pengfei Li, Ying Liu, Boris A. Malomed   +8 more
doaj   +1 more source

Unimodular Multi-Input Multi-Output Waveform and Mismatch Filter Design for Saturated Forward Jamming Suppression

Sensors
Forward jammers replicate and retransmit radar signals back to generate coherent jamming signals and false targets, making anti-jamming an urgent issue in electronic warfare.
Xuan Fang, Dehua Zhao, Liang Zhang
doaj   +1 more source

Accurate detection of moving targets via random sensor arrays and Kerdock codes

, 2013
The detection and parameter estimation of moving targets is one of the most important tasks in radar. Arrays of randomly distributed antennas have been popular for this purpose for about half a century.
Strohmer, Thomas, Wang, Haichao
core   +1 more source

Perspective on Aqueous Batteries: Historical Milestones and Modern Revival

Advanced Materials, EarlyView.
This review retraces the development of aqueous batteries from classical Zn‐MnO2 chemistry to modern Zn and Ni systems, correlating voltage, capacity, and electrolyte formulation with practical performance. By mapping historical success and failure onto current and future research directions, it identifies guiding principles that steer the design of ...
Fangwang Ming, Dong Guo, Yizhou Wang, Hussam Qasem, Hanfeng Liang, Husam N. Alshareef   +5 more
wiley   +1 more source

Diagnosis of array antennas based on near-field data using Faster R-CNN

Materials & Design
In this paper, a source reconstruction method for detecting failures in array antenna elements using near-field data based on Faster region-convolutional neural network (Faster R-CNN) is introduced.
Boguang Yang, Yulun Wei, Jixiang Shi, Tao Hong, Liangyu Li, Kai-Da Xu   +5 more
doaj   +1 more source