Latest Space News
Thu, 22 Mar 2018 18:39:52 +0000
The 2018 defense appropriation may be the one and only chance for Congress to add $600 million for two new satellites given how large of an increase the Pentagon is getting — $61 billion more than last year’s funding.
Thu, 22 Mar 2018 17:28:33 +0000
Spanish startup Zero 2 Infinity will use a 3D-printed combustions chamber for the engines it is developing to power its Bloostar balloon-assisted orbital rocket.
Thu, 22 Mar 2018 17:09:09 +0000
A final fiscal year 2018 omnibus spending bill released March 21 fully funds two key weather satellite programs at NOAA while increasing funding for future weather satellites and space weather efforts.
Thu, 22 Mar 2018 07:00:22 +0000
A final fiscal year 2018 spending bill released by House and Senate appropriators March 21 would give NASA more than $20.7 billion, far above the administration’s original request.
Wed, 21 Mar 2018 22:31:04 +0000
The Air Force's share of the Defense Department's $12.5 billion national security space budget is $11.4 billion.
Wed, 21 Mar 2018 22:03:48 +0000
A Belgian court reversed approval for Inmarsat’s European Aviation Network in the country after fleet operator Viasat challenged the legality of its authorization.
Wed, 21 Mar 2018 19:55:11 +0000
The European Space Agency is revising its e.Deorbit program to look for synergies between the mission and satellite servicing vehicles.
Wed, 21 Mar 2018 19:32:51 +0000
Congress expects to receive from Hyten in June a “warfighting concept of operations” for space. One of the topics will be how to prepare the military for space operations.
Wed, 21 Mar 2018 16:06:41 +0000
Relativity, the startup company developing small launch vehicles using additive manufacturing technologies, announced March 21 an agreement with NASA’s Stennis Space Center to take over one of its test stands.
Wed, 21 Mar 2018 13:20:38 +0000
President Trump's riff on creating a military space force captured the public’s imagination, spawning memes and jokes about starship ninjas gearing up to fight the nation’s wars in space.
Wed, 21 Mar 2018 11:05:37 +0000
The Japanese government, working with private ventures, announced plans March 20 to establish a nearly billion-dollar fund to support the development of space startups in the country.
Wed, 21 Mar 2018 01:24:13 +0000
An Alaskan spaceport will host the first launch of a rocket developed by a stealthy startup company as soon as next week, spaceport officials confirmed March 20.
Tue, 20 Mar 2018 20:40:50 +0000
A decision on a new launch date for NASA’s James Webb Space Telescope, and announcement of any potential breach of its $8 billion cost cap, could come next week, an agency official said March 20.
Tue, 20 Mar 2018 18:20:11 +0000
A letter signed by more than 60 House members calls on the Senate to advance the stalled nomination of fellow congressman Jim Bridenstine to be NASA administrator.
Tue, 20 Mar 2018 17:29:38 +0000
Citing recent reforms that provide more time to orbit a new satellite constellation, satellite broadband-startup OneWeb asked U.S. telecom regulators to nearly triple the size of its authorized low-Earth-orbit constellation.
Tue, 20 Mar 2018 10:53:36 +0000
Citing progress in producing plutonium-238, NASA will allow scientists proposing missions for an upcoming planetary science competition to use nuclear power sources.
Tue, 20 Mar 2018 04:30:11 +0000
Seeking to return a borrowed satellite as soon as possible, Israeli fleet operator Spacecom is very close to purchasing a new satellite dubbed Amos-8, a company official said March 14.
Mon, 19 Mar 2018 17:49:42 +0000
For the space-based infrared SBIRS satellites 5 and 6, the Air Force says the per-unit cost went down 12 percent — from $1.9 billion to $1.6 billion.
Mon, 19 Mar 2018 10:39:02 +0000
Companies that are developing small launch vehicles or who provide rideshare launch services say they expect new Chinese launch vehicles to drive down launch prices, raising concerns among some of unfair competition.
Sun, 18 Mar 2018 09:26:31 +0000
Pentagon official: “There are new threats that the industrial base needs to support. So what does this mean in terms of production capacity?”
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    Personal information
    Contact information
    Candidate Profile
     Date Submitted:23-03-2015
     Last Modified:23-03-2015 (04:24)
    Job information
     Current job:Post doctoral fellow - Power electronics
     Employment Term:Temp/Contract
     Job location:Anywhere
     Date available:within 3months
     KeywordsPower electronics, SMPS, wide band gap devices, power managment, converter design,


                    2011-2014        Ph.D in power electronic: G2Elab/Thales, Grenoble, France

    Thesis title: High frequency DC-DC converter using GaN devices.


                    2007-2010        ENGINEERING SCHOOL: ENSE3, GRENOBLE, FRANCE

    Electrical engineering degree with a specialization in power electronic.



                    2014-2015        Postdoctoral fellow, G2Elab, France

    ·      Design of 600V switching mode power supply (SMPS) using GaN devices, for motor control.

    ·      Computation of stray parasitic elements to improve dynamic performances.

    ·      Study of different gate driver topologies to work at high temperature.

    ·      EMC optimization

    ·      PCB design

    ·      Tests and measures

    ·      Team leader in the Little Box Challenge (LBC).  High power density, single phase 2kVA inverter.

    ·      Optimization of every aspect of the inverter: Control, gate driver, layout, EMC, filters, power topology, packaging, thermal aspects…

    ·      Multi-level topology

    ·      Active filter

    ·      GaN FET


                    2011-2014        Ph.D student, G2Elab/Thales, France

    ·      Realization of a 100W 1.4MHz insulated DC/DC converter achieving 92% efficiency.

    ·      Analysis of insulated DC/DC converter topology like DAB.

    ·      Use of MOSFETs and wide band gap devices for high frequencies (GaN devices).

    ·      PCB design using Altium. Reduction of parasitic elements to prevent EMC issues. SMD and through hole devices on PCB or IMS substrate.

    ·      Hardware construction. Electronic hardware design.

    ·      Parasitic elements computation using InCa3D.  Design of inductances using PCB tracks.

    ·      Design of different insulated gate driver topologies. Realization of an IC to improve commutation of wide band gap devices.

    ·      Simulation of power electronic circuits (SMPS) using SPICE-like tools.

    ·      Loss computation in switches and magnetic elements using Mathcad.

    ·      Design of magnetic components.

    ·      Analogue and digital controllers.

    ·      Measures, test and debug of switch mode power supply.


    2010                    research internship, CEA-INES, Bourget du lac, France (6months)

    ·         Study of the impact of soiling on photovoltaic panel efficiency.

    ·         Spectral responsivity analysis.

    ·         Spectrometry.


    2009                    Internship, Expert solaire, Poisat, France (3months)

    ·         Design of solar PV array systems on roofs using PVsyst.

    ·         Evaluation of shadings.

    ·         3D modelling of the building and its PV system.



    insulated gate driver for eGaN fets

    Delaine, Johan ; Jeannin, Pierre-Olivier ; Frey, David ; Guepratte, Kevin

    Energy Conversion Congress and Exposition (ECCE), 2014


    Improvement of GaN transistors working conditions to increase efficiency Of A 100W DC-DC converter

    Delaine, Johan ; Jeannin, Pierre-Olivier ; Frey, David ; Guepratte, Kevin

    Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Seventh Annual IEEE


    High frequency DC-DC converter using GaN device

    Delaine, Johan ; Jeannin, Pierre-Olivier ; Frey, David ; Guepratte, Kevin

    Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE



    French: native language.

    English: Fluent.



    Traveling, hand ball (captain and coach), riding motorcycle, growing bonsai and playing guitar and drums.

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