Results 31 to 40 of about 6,815,632 (371)
Energies, 2018 In this article, a highly efficient power module is presented with two class-E power amplifiers and an adaptive power combiner for transmitting output powers >100 W at 6.78 MHz in a wireless power transfer system.
Ui-Gyu Choi, Jong-Ryul Yang
doaj +1 more source
Self-Phase Modulation-Induced Instability of High-Power Narrow-Linewidth Fiber Amplifiers
Photonics, 2023 In this study, we investigated the effect of self-phase modulation (SPM)-induced modulation instability (MI) on the spectral purity of high-power narrow-linewidth fiber amplifiers and established a spectral evolution model for SPM-induced MI in those ...
Xiaoqin Shan, Yunhan Zheng, Rihong Zhu
doaj +1 more source
GaN-based Power amplifiers for microwave applications
Ingeniería Investigación y Desarrollo, 2016 This paper presents a discussion about the design strategies of different kind of power amplifiers for RF/Microwave appli- cations, such as the tuned load power amplifier, class F, class F-1 and Doherty.
Jorge Julián Moreno-Rubio +5 more
doaj +1 more source
Wideband Techniques for Outphasing Power Amplifiers
IEEE Transactions on Circuits and Systems Part 1: Regular Papers, 2018 In this paper a wideband, high-power amplifier that achieves an output power of 20 W with a bandwidth greater than one octave in the L and S bands is presented. Two ~10 W Class AB PAs are implemented with Gallium Nitride-high electron mobility transistor
Kyle D. Holzer, Wen Yuan, J. Walling
semanticscholar +1 more source
Cost effective power amplifiers for pulsed NMR sensors [PDF]
, 2015 Sensors that measure magnetic resonance relaxation times are increasingly finding applications in areas such as food and drink authenticity and waste water treatment control.
Hughes-Riley, T, Morris, RH, Newton, MI
core +1 more source
Design and implementation of a 1.65~3 GHz 500 watts power amplifier
Dianzi Jishu Yingyong, 2022 Modern transmission systems have put forward higher and higher requirements for the working frequency band and power level of power amplifiers, and the design of power amplifiers based on GaN power devices can meet these new requirements.
Xue Xin, Dong Liang, Wu Jiaqian
doaj +1 more source
Distributed active transformer - a new power-combining andimpedance-transformation technique [PDF]
, 2002 In this paper, we compare the performance of the newly introduced distributed active transformer (DAT) structure to that of conventional on-chip impedance-transformations methods. Their fundamental power-efficiency limitations in the design of high-power
Aoki, Ichiro +3 more
core +1 more source
IEEE Open Journal of Circuits and Systems, 2023 Recent advancements in low power and low noise front-end amplifiers have made it possible to support high-speed data transmission within the deep roll-off regions of conventional wireline channels.
Yudhajit Ray, Shreyas Sen
doaj +1 more source
Suppression of stimulated Brillouin scattering in optical fibers using a linearly chirped diode laser [PDF]
, 2012 The output of high power fiber amplifiers is typically limited by stimulated Brillouin scattering (SBS). An analysis of SBS with a chirped pump laser indicates that a chirp of 2.5 × 10^(15) Hz/s could raise, by an order of magnitude, the SBS threshold ...
Cahill, J. P. +7 more
core +1 more source
Waveforms for the Massive MIMO Downlink: Amplifier Efficiency, Distortion and Performance
, 2015 In massive MIMO, most precoders result in downlink signals that suffer from high PAR, independently of modulation order and whether single-carrier or OFDM transmission is used. The high PAR lowers the power efficiency of the base station amplifiers.
Eriksson, Thomas +2 more
core +2 more sources