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CV: Scientist
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Date Submitted: Last Modified: Current job: Employment Term: Job location: Date available: Industry: KeywordsDate 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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