Results 81 to 90 of about 5,033,045 (217)

Seasonal Modulation of ENSO Teleconnections to Horn of Africa Rainfall

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract Rainfall over the Horn of Africa (HoA) exhibits pronounced interannual variability linked to the El Niño‐Southern Oscillation (ENSO). However, the seasonal evolution of ENSO‐driven rainfall anomalies is not adequately explained by the ENSO, particularly the Niño3.4 index.
Charles Yusuph Ntigwaza, Wenjun Zhang, Teng Zhang, Feng Jiang, Hyacinth Nnamchi   +4 more
wiley   +1 more source

Design of a Doherty Power Amplifier in GaN Technology for 5G Applications [PDF]

, 2022
openIl numero di dispositivi e utilizzatori di Internet è in costante e rapida crescita. L'accesso ad Internet tramite dispositivi mobili è supportato dalla graduale introduzione del nuovo standard 5G, che permette velocità di trasmissione dati e ...
PARENZAN RUPENA, MARCO
core  

a 5G Doherty Power Amplifier Design Using Two-Section Impedance Transfer Networks

ARO-The Scientific Journal of Koya University
This paper introduces a simulation-based design study of a high-performance 2.6 GHz Doherty power amplifier (DPA) designed for 5G New Radio n7 and n38 frequency band applications.
Fawwaz Hazzazi, Salah I. Yahya, Reza Ebrahim Pourian, Ali Roshani, Saeid MahdiAbadi, Saeed Roshani, Sobhan Roshani   +6 more
doaj   +1 more source

Regolith Simulant Adhesion to Polycarbonate and PDMS: Deposition Methods, Coverage, and Removal Resistance

Macromolecular Materials and Engineering, Volume 311, Issue 11, November 2026.
Adhesion of lunar and Martian regolith simulants to polymer surfaces was investigated using air and rolling contact deposition. Polycarbonate showed significantly lower adhesion than PDMS, suggesting that substrate stiffness may play a more significant role than surface energy in controlling regolith adhesion.
Emma Nolan, Emily Power, Dylan Doherty, Susan M. Kelleher   +3 more
wiley   +1 more source

Parallel Doherty RF Power Amplifier For WiMAX Applications [PDF]

, 2018
: This work covers the design and implementation of a Parallel Doherty RF Power Amplifier in a GaN HEMT process for medium power macro-cell (16W) base station applications.

core  

Load Mismatch Compensation of Load-Modulated Power Amplifiers: A Comprehensive Review

Energies
With 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, Weimin Shi, Jinting Liu, Tian Qi, Mingyu Li   +4 more
doaj   +1 more source

34 dBm GaN Doherty Power Amplifier for Ka-band satellite downlink [PDF]

, 2021
This paper presents the design and experimental characterization of a Doherty power amplifier cell targeting the satellite Ka-band downlink. The foreseen application is in a combined power amplifier, where two Doherty cells are combined in parallel to ...
Quaglia R., Piacibello A., Giofré Rocco, Giofre R., Camarchia V.   +4 more
core  

A multi-objective optimization based doherty power amplifier and its matching network optimization method. [PDF]

PLoS One, 2023
Sun J.
europepmc   +1 more source

A 28-GHz CMOS-65 nm Dual Mode Class-J Doherty Power Amplifier With Integrated Class-G Driver and Impedance-Modulated- Quadrature-Transformer Achieving 21% Back-Off Efficiency

IEEE Access
In 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, Jagadheswaran Rajendran, Norhamizah Idros, Sofiyah Sal Hamid, Asrulnizam Bin Abd Manaf, Narendra Kumar, Abdullah Alghaihab, Arokia Nathan, Binboga Siddik Yarman   +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