Results 61 to 70 of about 239,965 (279)

Energy Harvesting for Secure OFDMA Systems

, 2014
Energy harvesting and physical-layer security in wireless networks are of great significance. In this paper, we study the simultaneous wireless information and power transfer (SWIPT) in downlink orthogonal frequency-division multiple access (OFDMA ...
Feng, Suili, Liu, Yuan, Zhang, Meng
core   +1 more source

Analysis And Design Of Wireless Power Transfer System (Wireless Power Transfer)

Jurnal Mekintek : Jurnal Mekanikal, Energi, Industri, Dan Teknologi, 2020
Wireless Power Transfer is a way of sending electrical energy through air media, so that electrical energy can be transmitted from a power source to an electrical load without using a conductor or cable. The maximum distance that can be sent by the transmitter to the receiver is 5cm with a voltage of 1.3 volts. This proves that the farther the distance
openaire   +2 more sources

A Smart Magnetically Actuated Flip‐Disc Programmable Metasurface with Ultralow Power Consumption for Real‐Time Channel Control

Advanced Functional Materials, EarlyView.
The study proposes a 1‐bit programmable metasurface based on flip‐disc display, named flip‐disc metasurface (FD‐MTS). This new design enables ultralow energy consumption while maintaining coding patterns. It also exhibits high scalability and multifunctional flexibility.
Jiang Han Bao, Che Liu, Jia Cheng Li, Zhen Hao Fu, Yi Su Huang, Si Qi Huang, Lei Zhang, Jian Wei You, Tie Jun Cui   +8 more
wiley   +1 more source

Mitigating leakage electric field in inductive power transfer via winding and compensation capacitor configuration

Wireless Power Transfer
As inductive power transfer (IPT) systems gain increasing attention, optimizing electric field distribution and reducing intensity are crucial to ensuring system safety within electromagnetic exposure limits.
Zeeshan Shafiq, Siqi Li, Zhe Liu, Sizhao Lu, Tong Li, Enguo Rong, Zhe Li   +6 more
doaj   +1 more source

Magnetic Beamforming for Wireless Power Transfer

, 2015
Magnetic resonant coupling (MRC) is an efficient method for realizing the near-field wireless power transfer (WPT). The use of multiple transmitters (TXs) each with one coil can be applied to enhance the WPT performance by focusing the magnetic fields ...
Moghadam, Mohammad R. Vedady, Yang, Gang, Zhang, Rui   +2 more
core   +1 more source

Solvent‐Free Bonding Mechanisms and Microstructure Engineering in Dry Electrode Technology for Lithium‐Ion Batteries

Advanced Functional Materials, EarlyView.
Dry electrode technology revolutionizes battery manufacturing by eliminating toxic solvents and energy‐intensive drying. This work details two promising techniques: dry spray deposition and polymer fibrillation. How their unique solvent‐free bonding mechanisms create uniform microstructures for thicker, denser electrodes, boosting energy density and ...
Yuhao Liang, Hao Long, Zimo Huang, Ting He, Xueming Chen, Meng Li, Hao Chen, Shanqing Zhang   +7 more
wiley   +1 more source

A sliding-mode-controlled rectification method for electric wheelchair wireless charging

Wireless Power Transfer
This article proposes a sliding-mode-controlled rectification method to address charging current fluctuations caused by coupling coil misalignment or distance variations in electric wheelchair applications.
Junhao Yang, Tianxu Feng, Junhao Zhang, Yu Ren, Liukang Tang   +4 more
doaj   +1 more source

Organic laser power converter for efficient wireless micro power transfer

Nature Communications, 2023
Wireless power transfer with collimated power transmission and efficient conversion provides an alternative charging mode for off-grid and portable micro-power electronics. However, charging micro-power electronics with low photon flux can be challenging
Yafei Wang, Zhong Zheng, Jianqiu Wang, Pengqing Bi, Zhihao Chen, Junzhen Ren, Cunbin An, Shaoqing Zhang, Jianhui Hou   +8 more
doaj   +1 more source

Photo‐Switching Thermal and Lithium‐Ion Conductivity in Azobenzene Polymers

Advanced Functional Materials, EarlyView.
Light‐responsive azobenzene polymers control thermal and ionic transport simultaneously through structural transitions. UV illumination disrupts π–π stacking, converting crystalline trans states to amorphous cis configurations. Thermal conductivity drops from 0.45 to 0.15 W·m−1·K−1 while Li+ diffusivity increases 100 fold. This dual transport switching
Jaeuk Sung, Jungwoo Shin, Qiujie Zhao, Minjee Kang, Christopher Evans, Cecilia Leal, Paul V. Braun, David G. Cahill   +7 more
wiley   +1 more source

13.56 MHz magnetic backplate-integrated PAWC wireless power transfer: an innovative switchless control and no-load protection approach

Wireless Power Transfer
This study first proposes a planar alternating winding coil (PAWC) integrating a magnetic backplate, adopting a dual-sided alternating winding architecture on dielectric substrates.
Zixuan Yi, Xiaojun Tao, Dan Zeng, Meiling Li   +3 more
doaj   +1 more source