Results 31 to 40 of about 4,965,450 (253)

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

Doherty Power Amplifiers for Ka-Band Satellite Downlink [PDF]

, 2022
This paper describes the design, realization and tests of different Doherty power amplifiers (DPAs) specifically conceived for Ka-band satellite downlink applications, i.e., 17.3 - 20.3 GHz.
Rocco Giofre, Piacibello, Anna, Giofre, Rocco, Camarchia, Vittorio, Anna Piacibello, Paolo Colantonio, Colantonio, Paolo, Vittorio Camarchia   +7 more
core   +1 more source

Research and design of transient pulse damage in high-power RF amplifier

Dianzi Jishu Yingyong
Due to a variety of imperceptible design defects，high-power RF amplifiers are prone to transient pulse, which has a significant impact on the reliability and service life of the hardware，and seriously interfere with the quality of work.
Xu Hao
doaj   +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

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Digital Predistortion for Dual-Input Doherty Amplifiers [PDF]

, 2012
This paper presents a digital predistortion technique for dual-input Doherty power amplifiers. The proposed technique utilizes both RF inputs of the main and peak amplifiers in the digital predistorter.
Fager, Christian, Fager, Christian,, Christian Fager, Vreede, Leo de,, Jawad Qureshi, Eriksson, Thomas,, Qureshi, Jawad, Eriksson, Thomas, Haiying Cao, Leo de Vreede, Cao, Haiying,, Vreede, Leo de, Qureshi, Jawad,, Thomas Eriksson, Cao, Haiying   +14 more
core   +1 more source

Utilizing Neural Network for Designing Load‐Independent Class E Inverter

IET Power Electronics
This paper presents the design, simulation, and fabrication of a load‐independent Class E inverter utilizing an artificial neural network (ANN) facilitator.
Mehrnaz Khodadoost, Mohsen Hayati, Hamed Abbasi   +2 more
doaj   +1 more source

Analysis of Discrete-Time Integrating Amplifiers as an Alternative to Continuous-Time Amplifiers in Broadband Receivers

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

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

New Accurate Wattmeter Based on Logarithmic Amplifiers [PDF]

Engineering and Technology Journal, 2018
Analog Computers can realize most of mathematical equations; these equations can be solved using difference, adder, logarithmic, anti-logarithmic, integrator, and differentiator amplifiers.
Azzad Saeed
doaj   +1 more source