CV: Scientist


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Candidate Profile
 Date Submitted:21-09-2017
 Last Modified:26-09-2017 (03:52)
Job information
 Current job:Scientist
 Employment Term:Permanent
 Job location:Anywhere
 Date available:within 2 months
 Industry:Satellite Manufacturers and Subcontractors, Launch Systems, Consulting/Engineering Services
 KeywordsSPACE PROGRAM MANAGEMENT, PAYLOAD TESTING, SPACE TECHNOLOGY ANALYST, DESIGN & MANUFACTURING EPC, SSPA, TWTA
CV

Date of Birth, Place              28/05/1974, Kollam, Kerala

Present location                    Space Application Centre (SAC), ISRO, Ahmedabad, Gujarat       

Designation                          Senior Scientist, Space Program /Project  Manager / Team Leader, Payload DC Power Systems & RF Power Amplifier Expert

Research Experience/Area          20 Years. Space, Aerospace and Defense    Commercial / R&D /Critical Technology development Program  

Design, Qualification and FM manufacturing of Satellite DC Power Systems / RF systems, EPC, SSPA, TWTA Design, Simulation, Development, Testing/Optimizations, Qualification and Flight Model Manufacturing carried out for Communication, Navigation and Remote Sensing Satellites, Deep Space Missions.

Interesting fields               Space & Defense Program/Project Management, Payload Testing & Characterization, Satellite Power System Design/Simulations, Qualification, FM manufacturing, Advanced GaN based Hi-Rel DC/DC Conversion, ZVS/ZCS PWM & Resonant converters, Digital Control using FPGA/DSP,  Planar/Integrated Magnetics packaging, Circuit Simulation & Analysis, EMI/EMC Control, HMC/Power Hybrids, POL/LDO/MAGAMP designs, Envelope tracking, Flexible SSPA/GaN SSPA, Photovoltaic/Motor Controls, Linear/Nonlinear Robust Control Systems

Software skills                  ORCAD/PSPICE, SABER, SIMPLIS/SIMETRIX, LTSPICE, PSIM, MATLAB/SIMULINK, VHDL, Libero

Qualification                      Graduate in Engineering Technology, B-Tech [Electronics & Communication, TKMCE, Kollam, Kerala University, India]

Language Skills                 English, Hindi, Gujarati, Tamil, Malayalam

Membership                      

1. Associate of COSPAR [International Committee On Space Research, USA]

2. Member of VEDAS [Vacuum Electronic Device Application Society, India]     

Publications                       More than 25 Publications/Articles in IEEE and National Journals, Transactions, Conferences, ISRO documents

Appreciation                      Recipient of ISRO Team Excellence Award 2013 for developing 100W UHF SSPA / 60W C-TWTA

 

Work Experience:

1995-1997 Scientist CEERI, Pilani, Rajasthan

Worked in CEERI, Pilani (A CSIR Lab, Govt. Of India) as a Scientist during 1995-1997 and associated with Design and Development of Space TWT for ISRO & Military TWT for DRDO.

 

1997- 2017 Scientist SAC, ISRO, Ahmedabad

In SAC/ISRO as Scientist/Engineer, working towards research, design, development and production of satellite equipments: EPC (satellite power supply), SSPA and TWTA (Satellite RF power amplifiers). During the last 20 years, I have worked in the field of EPCs, SSPAs & TWTAs. I have been responsible design and development of a number of State of the art EPCs ranging from very low power to high power & high voltage with advanced topologies. I have also been involved in the indigenous development of Space TWTAs, Space SSPAs.

 

Professional Experience

Space Program Management, Coordinating with Contractors/sub-contractors, Payload subsystems/systems delivery

Design, Simulation, development, Testing, Qualification and Flight Model manufacturing of Space/Satellite systems

-Electronic Power Conditioners (EPCs) developed for Low, Medium and High Power (1W to 650W DC) onboard Comm. and Navigation Satellite Payloads

-High Voltage Electronic Power Conditioners (HV-EPCs) developed for 3KV to 6KV (150W-1500W DC) for TWTAs and Ion Thrusters

-Indian Space Traveling Wave Tube Amplifiers (TWTAs) developed; Flight Model 60W C-Band TWTAs and Engineering Model 140W Ku-Band TWTAs

Handled multi-disciplinary science and technologies (Power electronics, Digital, RF& Microwave, UHV/HV systems, Metal-Ceramic technologies, Material science & Particle physics)

Co-coordination among “Govt.R&D – Academy – Industry” Network projects for various critical technologies development and technological capability building.

Exposure to versatile work environments viz. Fundamental Research environment, Semi R&D + Production environment, Large scale Industrial Production environment; during execution of various collaborative projects.

20 years of experience in procurement of Satellite systems (EPCs, Receivers, SSPAs, TWTAs) from global market. Interaction with renowned Space Equipment Manufacturers Boeing/L3Comm USA, TEASAT/Thales/Astrium EADS Germany/France, Alcatel Space Denmark, IR/Infineon, ASP, Germany, MDA, Canada

Deputed to three renowned space equipment manufacturers (M/s BOEING USA, M/s THALES & M/s ASTRIUM Germany)

Functioned as Member in several RFP Review Committee, PDR/CDR Committee for Electronic Warfare/Radar Systems of DRDO, Space Systems of ISRO.             

 

Equipments Designed, Developed & Qualified for various Space programs of ISRO

EPC for C, Ku Band LNA, U/D Converter, Receivers, Beacon       3W, 7.5W, 15W DC Power level                   26-42V Bus & 70V Bus designs

EPC for UHF, L, S, C Band GaAs SSPAs              25W, 50W, 120W, 300W DC Power level                      42V Bus & 70V Bus designs

EPC for UHF, L, S, C Band GaN SSPAs               125W, 170W, 350W, 650W DC Power level                   26-42V Bus & 70V Bus designs

HVEPC and C-Band TWTAs                   HV EPC 3KV@150W DC &   60W C-Band TWTA                26-42V Bus & 70V Bus designs

HV EPC and Ku-Band TWTAs                HV EPC 6KV@300W DC &   140W Ku-Band TWTA             26-42V Bus & 70V Bus designs

 

Equipments Design, Development presently carrying out along with ISRO’s Commercial Program Managements

New generation FPGA Controlled EPC            50-650W EPCs for 15W-250W Flexible GaN SSPAs              26-42V Bus & 70V Bus designs

New generation eGaN Based EPCs             50-650W Switching GaN EPCs for 15W-250W GaN SSPAs             70V Bus designs

HV-EPC for Ion Thruster                    1KV-2KV, 500W-1500W DC Power supply               70V Bus designs

 

Conversion topologies worked on              Low voltage:  Flyback, Forward, Push-pull, RR/Active Clamp Forward, LLC, ZVT PSFB SR/CDR

                                                                  High Voltage: ZVS/ZCS Push-pull, ZVT PSFB, Series Resonant PSFB, LLC/LCC PSFB

 

    Control methods worked on                  Analog control:  Voltage Mode, Current Mode, Feed-Forward, Phase shifted PWM, PFM

Digital Control:  Dynamic Bias, Envelope tracking Flexible DSP/FPGA/ASIC Controlled (DPWM, DPID, DPFM) EPCs for new generation Flexible payloads

 

    Packaging technologies worked on   Control HMCs, Power Hybrids, Planar Magnetics, Integrated Magnetics, FPGA, ASIC, LTCC


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