Results 11 to 20 of about 208,038 (301)
IEEE Access, 2023 In this study, we propose a digital beamforming system for microwave power transfer with a real-time beam-scanning algorithm for tracking a moving receiver. To perform scanning, each channel in the transmitter generates and converts a baseband signal for
Minjae Ahn +4 more
doaj +1 more source
Large microwave generation from d.c. driven magnetic vortex oscillators in magnetic tunnel junctions [PDF]
, 1999 Spin polarized current can excite the magnetization of a ferromagnet through the transfer of spin angular momentum to the local spin system. This pure spin-related transport phenomena leads to alluring possibilities for the achievement of a nanometer ...
Dussaux, A. +12 more
core +5 more sources
RF and Microwave Power Standards from 10 MHz to 40 GHz over Decades [PDF]
Journal of the Korean Institute of Electromagnetic Engineering and Science, 2018 Radio frequency (RF) and microwave power is one of the key quantities in the framework of electromagnetic measurement standards. Therefore, the stability of the power standard is essential to users’ reliable measurements in various areas.
Tae-Weon Kang +3 more
doaj +1 more source
A Study on Automatically Target-Chasing Microwave Power Transfer Systems in Multipath Environments
Energies, 2022 In this paper, we propose novel retrodirective systems to improve the efficiency and safety of microwave power transmission (MPT) systems in multipath environments.
Naoki Shinohara, Taichi Sasaki
doaj +1 more source
Wireless Power Transfer System Based on Strapping Resonators
Applied Sciences, 2018 In this study, a kind of strapped resonator is proposed to deal with high power wireless power transfer (WPT) in microwave regimes. In many specific applications, such as high power microwave wireless power transfer system (WPT), a coil resonator is not ...
Fei-Fei Guo, Shuai Ding, Bing-Zhong Wang
doaj +1 more source
Energies, 2022 In this article, the concept of a 22-kW microwave-powered unmanned aerial vehicle is presented. Its system architecture is analyzed and modeled for wirelessly transferring microwave power to the flying UAVs.
Muttahid Ull Hoque +3 more
doaj +1 more source
International Journal of Antennas and Propagation, 2013 This paper describes experimental demonstrations of a wireless power transfer system equipped with a microwave band communication function. Battery charging using the system is described to evaluate the possibility of the coexistence of both wireless ...
Satoshi Yoshida +4 more
doaj +1 more source
A Comparison of Laser and Microwave Approaches to CW Beamed Energy Launch [PDF]
, 2006 One approach to beamed energy propulsion uses a solid heat exchanger to absorb energy from a distant source and transfer it to a working fluid. Systems of this type can be designed using either microwave or laser sources.
Kare, Jordin T., Parkin, Kevin L. G.
core +1 more source
Design and implementation of a near-field focused metasurface for microwave power transmission
Results in Physics, 2023 In this paper, a near-field focused (NFF) metasurface composed of sub-wavelength structures for microwave power transmission is designed and implemented.
Han Xiong +5 more
doaj +1 more source
Noise Suppression and Precise Phase Control of a Commercial S-Band Magnetron
IEEE Access, 2020 We demonstrate noise suppression and precise phase control of a commercial 2.45GHz magnetron aiming for wireless power transfer application. The impurity of the microwave spectrum was confirmed to be due to the switching frequency of 76kHz in the power ...
Seong-Tae Han +3 more
doaj +1 more source