Results 51 to 60 of about 2,939 (183)

Enhanced Transmit Efficiency of a Loop Array Combined With Out‐of‐Phase Passive Dipoles for Thoracic Spinal Cord MRI at 7T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose The design of radiofrequency (RF) coils tailored for the target anatomy is necessary to overcome the transmit field homogeneity and penetration issues at Ultra‐High‐Field (UHF). For the spinal cord, the optimal design has not yet been determined. This work intends to demonstrate the added value of a pair of passive dipoles placed under
Hugo Amat, Marc Dubois, Aurelien Destruel, Sajad Hosseinnezhadian, Djamel Berrahou, Charles Betemps, Amira Trabelsi, David Bendahan, Stefan Enoch, Virginie Callot, Redha Abdeddaim   +10 more
wiley   +1 more source

Ambient‐Spray Ni–Cu(–O)/Ag Nanowire Transparent Heaters for High‐Temperature Heating and Far‐/Near‐Field EMI Suppression

Advanced Materials Interfaces, Volume 13, Issue 16, 18 August 2026.
A vacuum‐free, ambient‐spray Ni–Cu(–O)/Ag nanowire transparent‐heater platform is realized via conformal junction‐shell engineering and silica–hybrid overcoating, enabling robust high‐temperature heating together with GHz‐band far‐field EMI shielding and near‐field magnetic‐noise attenuation.
Ye Na Heo, Do Il Kim, Hyun Ho Park, Soong Ju Oh, Sang Woo Kim   +4 more
wiley   +1 more source

Metasurface‐Enabled Active‐Like Passive Radar

Advanced Science, Volume 13, Issue 44, 7 August 2026.
A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li, Jiawen Xu, Hanting Zhao, Xu Zhao, Yanjin Chen, Tie Jun Cui, Vincenzo Galdi, Lianlin Li   +7 more
wiley   +1 more source

Low‐profile millimetre‐wave wideband microstrip antenna with parasitic patch arrays

IET Microwaves, Antennas & Propagation, 2021
A millimetre‐wave low‐profile wideband microstrip antenna is proposed. To widen impedance bandwidth and achieve stable large gain simultaneously, coplanar parasitic patch arrays are arranged on both sides of a microstrip patch fed by a coaxial probe ...
Mei Xue, Weikang Wan, Qidong Wang, Liqiang Cao   +3 more
doaj   +1 more source

A 0.7 to 30 GHz Coplanar Vivaldi Antenna

Microwave and Optical Technology Letters, Volume 68, Issue 8, August 2026.
ABSTRACT In the literature there are multiple Vivaldi antenna designs that have a wide impedance bandwidth; however, the usable bandwidth is often limited by pattern degradation at the higher frequencies of the band. This paper presents the design and implementation of a coplanar Vivaldi antenna with a 42.9:1 usable bandwidth ratio (0.7–30 GHz).
Jessica Mundell, Johann Wilhelm Odendaal, Johan Joubert, Bennie Jacobs   +3 more
wiley   +1 more source

PERFORMANCE ANALYSIS OF RECTANGULAR MPA USING DIFFERENT SUBSTRATE MATERIALS FOR WLAN APPLICATION

ICTACT Journal on Communication Technology, 2017
In this paper, a rectangular microstrip patch antenna (MPA) is designed using different substrate materials for analyzing the performance of the MPA. Alumina (Al2O3), Bakelite, Beryllium oxide (BeO), Gallium Arsenide (GaAs), RT-Duroid and Flame Retardant
E Aravindraj, K Ayyappan, R Kumar
doaj   +1 more source

A Compact Spin‐Coated Graphene UWB Antenna for Breast Tumor Detection

Advanced Engineering Materials, Volume 28, Issue 14, 22 July 2026.
A compact, spin‐coated graphene ultra‐wideband patch antenna designed for breast tumor detection, capable of distinguishing between malignant and benign tumors. This innovative antenna can serve as an effective initial screening tool, particularly in resource‐limited settings such as rural areas, where access to advanced medical equipment like MRI and ...
Raja Rashidul Hasan, Shuvra Saha, Sumit Hassan Eshan, Rinku Basak, Md. Nahian Al Subri Ivan, Ahmed Murtuza Saleque, Raja Tariqul Hasan Tusher, Sadia Zabin, Md. Abdur Rahman, Yuen Hong Tsang   +9 more
wiley   +1 more source

Investigation on Metamaterial Antenna for Terahertz Applications

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
In this paper, the metamaterial based rectangular microstrip patch antenna is proposed and designed for THz applications. The circular split ring resonator is implemented as metamaterial. By incorporating metamaterial in the conventional microstrip patch
Amalraj Taksala Devapriya, Savarimuthu Robinson   +1 more
doaj   +1 more source

Noninvasive Intelligent Brain‐Metasurface System for Real‐Time Electromagnetic Wave Manipulation

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
A noninvasive intelligent brain–computer interface (BCI) is integrated with a reconfigurable metasurface to establish a direct neural‐to electromagnetic transduction pathway for real time, multimodal wave control. By combining convolutional‐neural‐network‐based decoding of motor‐imagery electroencephalography (EEG) signals with threshold‐based ...
Xiao Hai, Ruiyang Shen, Xiaoyi Wang, Guo‐Min Yang   +3 more
wiley   +1 more source

An Active Beam‐Reconfigurable Retrodirective Array

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
The proposed beam‐reconfigurable retrodirective array not only enables retroreflection toward the signal source but also achieves flexible beam steering via a tunable reflection plate, offering a viable solution for real‐time multipoint communication and multitarget wireless power transfer.
Wen Yue Wei, Yan Shi, Li Jing Yang, Jun Wei Wu, Qiang Feng, Long Li   +5 more
wiley   +1 more source