Results 51 to 60 of about 134,248 (260)

Finding Structural Information of RF Power Amplifiers using an Orthogonal Non-Parametric Kernel Smoothing Estimator

, 2015
A non-parametric technique for modeling the behavior of power amplifiers is presented. The proposed technique relies on the principles of density estimation using the kernel method and is suited for use in power amplifier modeling.
Handel, Peter, Isaksson, Magnus, Khan, Zain Ahmed, Zenteno, Efrain   +3 more
core   +1 more source

Circuit QED with a Nonlinear Resonator : ac-Stark Shift and Dephasing [PDF]

, 2011
We have performed spectroscopic measurements of a superconducting qubit dispersively coupled to a nonlinear resonator driven by a pump microwave field. Measurements of the qubit frequency shift provide a sensitive probe of the intracavity field, yielding
Bertet, P., Blais, A., Boissonneault, M., Dewes, A., Doherty, A. C., Esteve, D., Mallet, F., Ong, F. R., Palacios-Laloy, A., Vion, D.   +9 more
core   +2 more sources

Inverted asymmetric Doherty power amplifier driven by two-stage symmetric Doherty amplifier

Electronics Letters, 2010
A new high efficiency Doherty structure for code division multiple access 2000 1×3-FA test signal is presented. The proposed Doherty structure consists of a two-stage symmetric Doherty drive amplifier and an inverted asymmetric Doherty power amplifier.
S.H. Chun, D.H. Jang, J.Y. Kim, J.H. Kim
openaire   +1 more source

The impacts of biological invasions

Biological Reviews, EarlyView.
ABSTRACT The Anthropocene is characterised by a continuous human‐mediated reshuffling of the distributions of species globally. Both intentional and unintentional introductions have resulted in numerous species being translocated beyond their native ranges, often leading to their establishment and subsequent spread – a process referred to as biological
Phillip J. Haubrock, Teun Everts, Neil Angelo S. Abreo, Jamie Bojko, Victor Deklerck, James W. E. Dickey, Ana Clara S. Franco, Emili García‐Berthou, Stelios Katsanevakis, Natalia I. Kirichenko, Stefano Mammola, Martin A. Nuñez, Ben Parker, Riccardo Scalera, Ismael Soto, Diederik Strubbe, Ali Serhan Tarkan, Lorenzo Vilizzi, Tim Adriaens, Paride Balzani, Dagmara Błońska, Elizabeta Briski, Rein Brys, Amy L. Burgess, James E. Byers, Carlos Cano‐Barbacil, Giuseppe Castaldelli, Jaimie T.A. Dick, Victoria Dominguez Almela, Romina D. Dimarco, Margarita Florencio, Antonín Kouba, Melina Kourantidou, Irmak Kurtul, Irene Martín‐Forés, Olivier Morissette, Julian D. Olden, Bruno E. Soares, Jakub Truszkowski, Hugo Verreycken, Marc Kenis, Ronaldo Sousa, J. Robert Britton   +42 more
wiley   +1 more source

Highly Efficient GaN Doherty Power Amplifier for N78 Sub-6 GHz Band 5G Applications

Electronics, 2023
In this paper, a high-efficiency GaN Doherty power amplifier (DPA) for 5G applications in the N78 sub-6 GHz band is introduced. The theoretical analysis of the matching networks for the peak and carrier transistors is presented, with a focus on the ...
Mohammed A. Elsayed Eid, T. Abouelnaga, Hamed A. Ibrahim, E. Hamad, Ahmed Jamal Abdullah Al-Gburi, Thamer A. H. Alghamdi, Moath A. Alathbah   +6 more
semanticscholar   +1 more source

Crisis Preparation, Capacity Building, and Community Resilience: Lessons From Maui

Nonprofit Management and Leadership, EarlyView.
ABSTRACT The 2023 Maui wildfires provide a unique context to explore the impact of nonprofit crisis networks taking a proactive role in community crisis response, leveraging resources, expertise, and networks. The Hawaiʻi Community Foundation (HCF) has been a key player in Maui's local response, providing critical support, mobilizing volunteers, and ...
Lauren Azevedo, Kaila Witkowski, Ratna Dougherty, Christa Remington   +3 more
wiley   +1 more source

GaN-based Power amplifiers for microwave applications

Ingeniería Investigación y Desarrollo, 2016
This paper presents a discussion about the design strategies of different kind of power amplifiers for RF/Microwave appli- cations, such as the tuned load power amplifier, class F, class F-1 and Doherty.
Jorge Julián Moreno-Rubio, Edison Ferney Angarita-Malver, Norma Restrepo-Burgos, Julián Leonardo Rodríguez, Juan Mauricio Salamanca, William Alexander Cuevas-Carrero   +5 more
doaj   +1 more source

A METHOD FOR DESIGNING BROADBAND DOHERTY POWER AMPLIFIERS [PDF]

Progress In Electromagnetics Research, 2014
In this contribution, a design approach for the realization of broadband Doherty Power Ampliflers (DPAs) is proposed and demonstrated. The methodology is based on the exploitation of the wideband response of 2-sections branch-line couplers both as input splitter and output combiner of the DPA.
PIAZZON, LUCA, GIOFRE', ROCCO, COLANTONIO, PAOLO, GIANNINI, FRANCO   +3 more
openaire   +2 more sources

Spatiotemporal Assessment of Groundwater Interactions With a Regulated River: A Case Study of the Nechako River, Canada

River Research and Applications, EarlyView.
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, John Gray, Avery Dextrase, Andre St‐Hilaire, Richard Martel   +4 more
wiley   +1 more source

Dynamic Power Splitting in a Hybrid Common-Emitter/Common-Base Doherty Amplifier for High Average Efficiency Above 100 GHz Using an InP HBT Process

IEEE Journal of Microwaves
A Doherty power amplifier is introduced that uses a hybrid combination of common-emitter (CE) and common-base (CB) devices for operation above 100 GHz. The use of CE and CB devices demonstrates dynamic input power splitting between a main and auxiliary ...
Eythan Lam, James F. Buckwalter
doaj   +1 more source