Results 141 to 150 of about 6,815,632 (371)

Design of a Load Modulated Balanced Amplifier with a Two-Stage Control Power Amplifier [PDF]

, 2023
Sagini E. Mochumbe, Youngoo Yang
openalex   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Laser peak power scaling and beam quality improvement with Ytterbium rod-type fiber amplifiers made by powder sinter technology

, 2018
Yuan Zhu
openalex   +2 more sources

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Few-cycle Yb-doped laser sources for attosecond science and strong-field physics

APL Photonics
Yb-doped laser amplifiers have, in recent years, found applications in attosecond science, driven largely by the opportunities associated with high-average-power and high-repetition-rate attosecond sources.
Tran-Chau Truong, Dipendra Khatri, Christopher Lantigua, Chelsea Kincaid, Michael Chini   +4 more
doaj   +1 more source

Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Ludger Overmeyer, Annika Raatz   +5 more
wiley   +1 more source

A Novel Autoregressive Spectral Estimation-Based Neural Network Crest Factor Reduction Structure in Power Amplifiers of 5G Systems in Sandstorm Environment [PDF]

, 2022
Xin Cao, Chenyi Wang, Qiang‐Ming Cai
openalex   +1 more source

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

Advanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan, David Bürger, Gunther Eggeler, Oleg Shchyglo, Ingo Steinbach, Muhammad Adil Ali   +5 more
wiley   +1 more source

Advancements in Doherty Power Amplifiers for High Efficiency, Broadband 5G, and Beyond

IEEE Access
Doherty Power Amplifiers (DPAs) are pivotal in meeting the stringent demands of modern wireless communication systems, including 5G New Radio, Wi-Fi 7, and joint communication and sensing (JCAS), where high peak-to-average power ratios (PAPR), wide ...
Meysam Azimi-Roein, Majid Baghaei-Nejad, Hafiz Hejazi   +2 more
doaj   +1 more source

Design and analysis of class E RF power amplifiers

, 2017
Sumati Sehajpal
openalex   +1 more source