Publications associées à Haute fréquence

Phase transitions, screening and dielectric response of CsPbBr3

Cesium-lead-bromide (CsPbBr3) is the simplest all inorganic halide perovskite. It serves as a reference material for understanding the exceptional solar cell properties of the organic-inorganic hybrid halide perovskites and is itself discussed as an altern ...

ROYAL SOC CHEMISTRY2020

Active Phase-Conjugating Rotman Lens With Reflection Amplifiers for Backscattering Enhancement

Pouyan Keshavarzian

Active retrodirective antenna arrays find a variety of use in applications involving wireless communication and sensing systems. This article presents a novel active version of the phase-conjugating Rotman lens with negative conductance amplifiers for appl ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020

High-Frequency GaN-on-Si power integrated circuits based on Tri-Anode SBDs

Elison de Nazareth Matioli, Remco Franciscus Peter van Erp, Halil Kerim Yildirim, Jun Ma, Luca Nela, Georgios Kampitsis

In this work, we report on the switching performance of AlGaN/GaN lateral Tri-Anode SBDs. The Tri-Anode architecture leads to a more than 50% reduction in the device charge with respect to conventional planar structure, confirmed both by capacitive and rev ...

IEEE2020

Distributed and dynamic strain sensing with high spatial resolution and large measurable strain range

Luc Thévenaz, Malak Mohamed Hossameldeen Omar Mohamed Galal, Zhisheng Yang, Li Zhang

A distributed and dynamic strain sensing system based on frequency-scanning phase-sensitive optical time domain reflectometry is proposed and demonstrated. By utilizing an RF pulse scheme with a fast arbitrary waveform generator, a train of optical pulses ...

2020

Comparison of Wide-band-gap Technologies for Soft-Switching Losses at High Frequencies

Elison de Nazareth Matioli, Halil Kerim Yildirim, Mohammad Samizadeh Nikooytabalvandani, Armin Jafari, Palliyage Srilak Nirmana Perera, Reza Soleiman Zadeh Ardebili, Furkan Karakaya

Soft-switching power converters based on wide-band-gap (WBG) transistors offer superior efficiency and power density advantages. However, at high frequencies, loss behavior varies significantly between different WBG technologies. This includes losses relat ...

2020

Multi-Variable High-Frequency Input-Admittance of Grid-Connected Converters: Modeling, Validation and Implications on Stability

Drazen Dujic, Francisco Daniel Freijedo Fernández, Marc Ferrer Duran

Modern grids are facing a massive integration of power electronics devices, usually associated to instability issues. In order to assess the likelihood and severity of harmonic instability in the high frequency region, this work develops a multi-variable i ...

2019

Transadmittance Efficiency under NQS Operation in Asymmetric Double Gate FDSOI MOSFET

Jean-Michel Sallese, Christophe Lallement

The state-of-the-art RF and millimeterwave circuits design requires accurate prediction of the nonquasi-static (NQS) effects at high frequency for all levels of channel inversion. This paper provides a practical insight to help high-frequency performance a ...

2019

Communication trade-offs for Local-SGD with large step size

Aymeric Daphnis Kévin Dieuleveut

Synchronous mini-batch SGD is state-of-the-art for large-scale distributed machine learning. However, in practice, its convergence is bottlenecked by slow communication rounds between worker nodes. A natural solution to reduce communication is to use the " ...

NEURAL INFORMATION PROCESSING SYSTEMS (NIPS)2019

F-19 Magic Angle Spinning Dynamic Nuclear Polarization Enhanced NMR Spectroscopy

David Lyndon Emsley, Dominik Józef Kubicki, Moreno Lelli, Jasmine Viger-Gravel, Claudia Esther Avalos, David Benjamin Roger Antoine Gajan

The introduction of high-frequency, high-power microwave sources, tailored biradicals, and low-temperature magic angle spinning (MAS) probes has led to a rapid development of hyperpolarization strategies for solids and frozen solutions, leading to large ga ...

WILEY-V C H VERLAG GMBH2019

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Haute fréquence

Phase transitions, screening and dielectric response of CsPbBr3

Active Phase-Conjugating Rotman Lens With Reflection Amplifiers for Backscattering Enhancement

High-Frequency GaN-on-Si power integrated circuits based on Tri-Anode SBDs

Distributed and dynamic strain sensing with high spatial resolution and large measurable strain range

Magnetic hyperthermia with epsilon-Fe(2)O(3)nanoparticles

Comparison of Wide-band-gap Technologies for Soft-Switching Losses at High Frequencies

Multi-Variable High-Frequency Input-Admittance of Grid-Connected Converters: Modeling, Validation and Implications on Stability

Transadmittance Efficiency under NQS Operation in Asymmetric Double Gate FDSOI MOSFET

Communication trade-offs for Local-SGD with large step size

F-19 Magic Angle Spinning Dynamic Nuclear Polarization Enhanced NMR Spectroscopy

Graph Chatbot

Chattez avec Graph Search

Transadmittance Efficiency under NQS Operation in Asymmetric Double Gate FDSOI MOSFET

Multi-Variable High-Frequency Input-Admittance of Grid-Connected Converters: Modeling, Validation and Implications on Stability

Active Phase-Conjugating Rotman Lens With Reflection Amplifiers for Backscattering Enhancement

Phase transitions, screening and dielectric response of CsPbBr3

High-Frequency GaN-on-Si power integrated circuits based on Tri-Anode SBDs

Distributed and dynamic strain sensing with high spatial resolution and large measurable strain range

Magnetic hyperthermia with epsilon-Fe(2)O(3)nanoparticles

F-19 Magic Angle Spinning Dynamic Nuclear Polarization Enhanced NMR Spectroscopy

Comparison of Wide-band-gap Technologies for Soft-Switching Losses at High Frequencies

Communication trade-offs for Local-SGD with large step size