Results 51 to 60 of about 839,323 (288)

A Foldable Tightly Coupled Crossed Rings Antenna Array of Ultrawide Bandwidth and Dual Polarization

IEEE Access, 2022
Low-profile foldable array antennas are becoming increasingly more important for a wide range of applications such as satellite communications and wearable electronic devices.
Yanwei Fu, Yongwei Zhang, Quan Shi, Murat Temiz, Ahmed El-Makadema, Jiajia Shi   +5 more
doaj   +1 more source

Advances in Sustainable and Wearable Textile Based Soft Robotics

Advanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas, Marzia Dulal, Sophia K. Novoselov, Victoria K. Novoselov, Kostya S. Novoselov, Shaila Afroj, Nazmul Karim   +6 more
wiley   +1 more source

Estimation and Minimization of the Cramer-Rao lower bound for radio direction-finding on the azimuth and elevation of planar antenna arrays

Journal of Communications Software and Systems, 2019
In this paper an approach of obtaining optimal planar antenna arrays consisting of omnidirectional sensors is proposed. The novelty of the proposed approach is to apply an exact expression of the Cramer-Rao lower bound for an arbitrary planar antenna ...
Ilia Peshkov, Yuri Nechaev
doaj  

Near-Field Focused Subarrays in a Multi-Panel Configuration

IEEE Access, 2019
This paper investigates the focusing features of a multi-panel near-field focused (NFF) antenna. Differently from conventional NFF planar arrays, the proposed configuration is made of a set of NFF subarrays that are concentrically arranged over a ...
Hsi-Tseng Chou, Marcos R. Pino, Paolo Nepa, Chang-Yi Liu   +3 more
doaj   +1 more source

Electrospun Wood‐Derived Biopolymers as Electrodes in Electrochemical Energy Storage Technologies

Advanced Functional Materials, EarlyView.
Electrospinning transforms wood‐derived cellulose and lignin into architecturally defined, binder‐free carbon electrodes with tuneable porosity and functionality. This review shows how fibre design enables decoupled charge and mass transport, enhancing performance across battery systems, while identifying key challenges in spinnability, scalability ...
Michael W. Thielke, Hattie R. Chisnall, Jesus Vazquez Chavez, Ana B. Jorge Sobrido   +3 more
wiley   +1 more source

Scanned microstrip arrays using simple integrated ferrite phase shifters [PDF]

, 2000
A phase-steered microstrip antenna array is presented, suitable for application as a mobile vehicle satellite terminal. Phase shifters are implemented on a hybrid dielectric-ferrite substrate, and use is made of the phase transition near the cut-off ...
Langley, Richard J., Batchelor, John C., Economou, L.   +2 more
core   +1 more source

Low-Side Lobes 3D Printed Slotted Waveguide Antenna Array for Millimeter-Wave Communication Systems

IEEE Access
In this paper, a 3D printed slotted waveguide antenna array is proposed for millimeter-wave communication systems at 28 GHz. The design method consists of the characterization of an isolated slot and then development of the linear and planar arrays.
Zia Ullah Khan, Shaker Alkaraki, Rifaqat Hussain, Khaled A. Aljaloud, Tian Hong Loh, Akram Alomainy   +5 more
doaj   +1 more source

Synthesis of Reflectors Characterized by the Spatial Dispersion of the Reflection Coefficient

IEEE Open Journal of Antennas and Propagation, 2020
Planar antenna reflectors are attractive for the designs of both narrow-beam antenna arrays and frequency-scanning arrays. Planar implementation of reflectors can be performed through substrate integrated waveguide (SIW) technology.
Kirill Klionovski, Sergey E. Bankov, Atif Shamim   +2 more
doaj   +1 more source

Functionalizing Micro‐to‐Mesoscopic Electrode Architectures for Regulating Electron Transfer Behaviors in Electrocatalysis

Advanced Functional Materials, EarlyView.
A systematic review is conducted to assess the influence of electrode architecture across micro‐ to mesoscopic length scales on electron‐transfer pathways in electrocatalysis. We discuss the structure‐activity relationships in electrocatalytic applications, including resource recovery and environmental remediation, and provide cost‐effective, efficient
Manshu Zhao, Jiaojiao Zhang, Shideng Yuan, Xinmeng Yu, Keming Wan, Xiaoguang Duan, Zhining Wang   +6 more
wiley   +1 more source

Design and Study of a Miniaturized Millimeter Wave Array Antenna for Wireless Body Area Network

International Journal of Antennas and Propagation, 2022
A miniaturized millimeter wave (mmWave) antenna for wireless body area networks is proposed in this paper. The antenna is found to be operational in the V-band, around the 60 GHz frequency range, with high efficiency of up to 99.98% in free space ...
Abdullah G. Alharbi, H. M. Arifur Rahman, Mohammad Monirujjaman Khan, Muhammad Inam Abbasi, Amani Abdulrahman Albraikan, Faris A. Almalki   +5 more
doaj   +1 more source