Results 131 to 140 of about 5,748,011 (307)

Design and Implementation of High Gain High Stability Power Amplifier for X band Radar Transmitter

, 2010
Power Amplifier (PA) is an important part of transmitter’s front end. The main function is to amplify extremely high gain high stability power amplifier for radar transmitter.
Htun Myint, Hla Myo Tun, Zaw Min Naing
core  

A Proposal for Adopting the Frequency Response of an Envelope Amplifier with Memoryless DPD EER PA Model

, 2012
Recently, dynamic power supply voltage techniques, such as an Envelope Elimination and Restoration power amplifier (EER-PA) or Envelope-Tracking Power amplifier (ET-PA), have been attracting much attention because they can maintain high efficiency in ...
Morris, Kevin, Funahashi, Yuuki, Yamaguchi, Keiichi, Kato, Takayuki, Yamaoka, Atsushi, Tanabe, Yasuhiko, Watkins, Gavin T., Kogami, Yoshinori, Zhou, Jiafeng   +8 more
core   +1 more source

Associations of Frailty With the Risk of Incident Cancer and Cancer‐Related Mortality in Veterans With Rheumatoid Arthritis

Arthritis Care &Research, EarlyView.
Objective This study investigated the association between frailty and cancer incidence and mortality in patients with rheumatoid arthritis (RA). It aimed to identify how frailty influences cancer risk and cancer‐specific outcomes. Methods This retrospective cohort study analyzed data from the Veterans’ Affairs Rheumatoid Arthritis Registry (2002–2023).
Bhavik Bansal, Aaron Baraff, Katherine Wysham, James S. Andrews, Bryant R. England, Ted R. Mikuls, Joshua Baker, Kaleb Michaud, Alexa Meara, Una Makris, Carolyn Presley, Ariela Orkaby, Namrata Singh   +12 more
wiley   +1 more source

Real‐World Safety of Concomitant Colchicine and Statin Therapy

Arthritis Care &Research, EarlyView.
Objective This study aimed to evaluate the risk of clinically meaningful muscle‐ and liver‐related outcomes associated with concomitant colchicine–statin therapy in a real‐world setting, and to determine whether concomitant therapy increases the incidence of toxicity compared with either agent alone.
Roni Meidan, Ranel Loutati, Dan Caspi, Ori Elkayam, Ran Abuhasira, Tali Eviatar   +5 more
wiley   +1 more source

Effect Modification of Cigarette Smoking on the Relationship Between Posttraumatic Stress Disorder, Other Mental Health Conditions, and Rheumatoid Arthritis Risk: A Large Case‐Control Study in US Veterans

Arthritis Care &Research, EarlyView.
Objective We examined associations of posttraumatic stress disorder (PTSD) and other mental health disorders (OMH) with rheumatoid arthritis (RA), accounting for effects of smoking. Methods We conducted a matched case‐control study, identifying incident RA cases and controls using national Veterans Health Administration data (2006–2019).
Kelsey Coziahr, Harlan Sayles, Tate M. Johnson, Joshua F. Baker, Punyasha Roul, Grant W. Cannon, Gary A. Kunkel, Katherine D. Wysham, Gail S. Kerr, Amir A. Razmjou, Isaac Smith, Jennifer L. Barton, Maria I. Danila, Jonathan S. Richards, Bryant R. England, Ted R. Mikuls   +15 more
wiley   +1 more source

High Power Amplifier Based on a Transformer-Type Power Combiner in CMOS Technology

, 2010
In this brief, a transformer-type power combiner for a fully integrated high-power CMOS power amplifier (PA) is presented. The proposed power combiner is composed of a number of transformers that, unlike the ones in conventional approaches, have ...
Mojtaba Atarodi, Luong, Howard C., Atarodi, Mojtaba, Javidan, Javad, Javad Javidan, Howard C. Luong   +5 more
core   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source

IEEE 802.11b/g High Efficiency CMOS Power Amplifier with an Integrated Adaptive Bias Circuit

, 2007
本論文探討以UMC CMOS 0.18um RF製程來實現Doherty PA電路架構，以提高6dB-backoff 時的功率輸出效率。經由S參數的量測，在2.4GHz的頻段中，有10.6dB的小訊號增益。該電路的最大輸出功率與P1dB分別為22.6dB與21.4dBm。此時PAE最高可達33.6%，於P1dB點為32.6%，在6dB-backoff時仍高達21.1%的高效率值。由於晶片內部不需採用螺旋電感，其晶片面積僅666*999 µm2。The Doherty power ...
劉致元, Liu, Zhi-Yuan
core