Results 91 to 100 of about 1,717 (209)
River Research and Applications, Volume 42, Issue 6, Page 1172-1187, July 2026.ABSTRACT Regulated rivers represent complex hydrological systems where groundwater–surface water interactions are governed by natural conditions and human interventions. This study investigates the spatiotemporal dynamics of groundwater–surface water exchanges in the Nechako River, British Columbia (Canada), using numerical simulations.
Milad Fakhari +4 more
wiley +1 more source
A Compact Output Power Combiner for Broadband Doherty Power Amplifiers
, 2019 A novel compact output power combiner for broadband Doherty Power Amplifiers is proposed in this paper. The proposed output power combiner avoids the use of quarter-wave impedance transformers as they are sizable and work over narrow bandwidths. Instead,
Mona Zaghloul, Ali Darwish, Ken McKnight
core +1 more source
Tropical Pacific Variability Drives Quasi‐Decadal Sea Ice Fluctuations Off East Greenland
Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.Abstract The sea ice off East Greenland exhibits pronounced quasi‐decadal fluctuations superimposed on its long‐term decline. Here we show that this low‐frequency variability is tightly phase‐coherent with tropical Pacific quasi‐decadal variability (TPQD), revealing a teleconnection from the tropics to the Arctic.
Rongrong Xu +5 more
wiley +1 more source
Broadband Doherty Power Amplifier using Symmetrical GaN Transistors [PDF]
, 2016 The wireless industry has seen a tremendous growth in its users over the last decade. This has led the industry to adapt a number of new standards allowing for better use of the scarce and often very fragmented frequency spectrum.
Wyrzykowska, Aneta
core
Load Mismatch Compensation of Load-Modulated Power Amplifiers: A Comprehensive Review
EnergiesWith the diversification, acceleration, and arraying of wireless communication systems, power amplifiers (PAs) face stricter demands in terms of RF operation bandwidth, high-efficiency power range, and load mismatch compensation.
Yufeng Zang +4 more
doaj +1 more source
Output Bandwidth Limitations of Basestation Power Amplifier Design and Its Implementation Using Doherty Amplifier [PDF]
, 2014 : This thesis is a study of Bandwidth limitation of basestation power amplifier and its Doherty application. Fundamentally, bandwidth of a power amplifier (PA) is limited by both its input and output prematch networks and its Doherty architecture ...
core
IEEE AccessIn this paper, a CMOS Class-J Doherty power amplifier (PA) integrating a Class-G driver and an Impedance-Modulated-Quadrature-Transformer (IMQT) to enhance back-off efficiency for multimode operations is presented.
Selvakumar Mariappan +8 more
doaj +1 more source
Digital Predistorter Design Using a Reduced Volterra Model to Linearize GaN RF Power Amplifiers [PDF]
Radioengineering, 2018 In this paper, a novel method for reducing a Simplified Volterra Series (SVS) model size is proposed for GaN RF Power Amplifier (PA) Digital Predistorter (DPD) design.
H. Rezgui, F. Rouissi, A. Ghazel
doaj
A multi-objective optimization based doherty power amplifier and its matching network optimization method. [PDF]
PLoS One, 2023 Sun J.
europepmc +1 more source
Power Consumption and Reduction of High-Power Amplifier in 5G NR Downlink
IEEE AccessThis article presents a method for estimating the power consumption of radio frequency (RF) power amplifiers (PAs) within the 5G new radio (NR) downlink (from the base station to user equipment), particularly in the absence of user data.
Yuki Takagi +3 more
doaj +1 more source