Posted by on December 22, 19102 at 08:03:35:
Bhupinder Singh
1A-084 Ridgewood Estate DLF-IV
Gurgaon 122002 Ph: 8942290 Mobile 9810794339
Email: bhupps2001@yahoo.com
SUMMARY Eleven years of experience in the Design and Development of RF and Microwave Circuits, Modules, and Systems containing VCOs, RF Amplifiers (LNAs and High Gain), Mixers, Printed Circuit Filters, Power Amplifiers, E-Plane Wave Guide Filters and Diplexers, PLDROs, PLLs, and Frequency Synthesizers. Use of Eesof Touch stone, Libra, ADS and MW Office in the Design of Microwave Circuits, modules. Electromagnetic Analysis of multiconductor and multilayered PCBs, microstrip and Wave Guide discontinuities up to 40GHz using EM Simulator of MW Office and IE3D EM Simulator.
EXPERIENCE
May 2002- Till Date HFCL R&D, Gurgaon
Senior Manager
· Design and Development of Upconverter and Downconverter for 155Mbps SDH Radio operating at 18 GHz.
· Design and Simulation of SDH Radio Architecture on System Simulator of MW Office.
· Simulation of the effect of AWGN Channel, RF Filter and Amplifier phase Non Linearities and their effect on System BER.
·
July 99 – April 2002 ADE, Bangalore
Scientist ‘D’
· Design and Development of highly efficient reverse link power amplifier for CDMA system such as IS-95.
· Design and Development of printed circuit mm-wave triplexer realized in suspended stripline.
· Design of VCOs and DR based oscillators in the Ka – Band.
· Design of test set up to carry out interference studies on the commercial GPS.
For all these circuits Design , verification and layout generation was done using CAD tools such as EESof’s Series IV, MW EM-Simulator and MATLAB 5.3.
July 95 – June 99 ADE, Bangalore
Scientist ‘C’
· Design and Development of Low to Medium Power FM Transmitters and Receivers for a L Band and C Band communication link.
· Design of PLL Oscillators and Frequency Synthesizers up to 2 GHz.
· Design of a L Band and a S Band LOS link to control an unmanned aircraft from ground.
Sept 91 – June 95 ADE, Bangalore
Scientist ‘B’
· Design and Development of Active and Passive Microwave circuits such as LNAs, RF Amplifiers( Broad Band and High Gain), Balanced Mixers, Power Amplifiers, IF Amplifiers, Printed circuit Filters,Cavity Filters etc.
· Analysis of Discontinuities in Stripline, Microstripline and suspended stripline using Method Of Moments(MOM) and Spectral Domain Immitance Approach.
DETAILS PROJECT -1
Design, Development, Testing and Integration of Transmitter and Receiver for an L-Band Ground to Aerial LOS link.
PROJECT DURATION
Two Years from Dec-95 to Dec-97.
STAFF
Three Scientists including me along with three technicians.
Project Description
A high sensitivity L-Band Telemetry Receiver and a Matched Low Power Transmitter for a ground to aerial LOS link was designed. The receiver was a simultaneous FM and AM receiver with a sensitivity of -95dbm for FM ( IF
bandwidth of 1MHz) and –100dbm for the AM (IF bandwidth of 10KHz). The FM output carries the data and the AM out put is used as reference for the Tracking Antenna so as to point it towards the aerial target. The Matched FM transmitter was a PLO based five watts on board Transmitter with a frequency deviation of 300KHz and maximum modulating Frequency of 150 KHz.. The sensitivity and Power figures were arrived at by carrying out Link calculation for a 75 KMs LOS link including a fading margin of more than 6db. To improve the efficiency of the transmitter a class C final Power Amplifier stage was used. A modular approach was used in the design of these RF subsystems and the various modules such as LNAs, Mixers, Printed Filters, Local Oscillators, Frequency Multipliers, IF Amplifiers, Modulators and Demodulators etc were designed and developed indigenously.
The Design, Design Evaluation and Simulations were carried in Six months time. Components procurement and prototype development took another Six months(as most of the components were imported from US). The testing including environmental and EMI/EMC as per MIL STD 461C lasted for another Six months and finally Design modifications, Final Document Preparation and Integration with other subsystems such as Encoder and Decoder took another Six months time. The final product was ready in December 97 for production.
All the above activities were carried out under my supervision and I as an active member of the team was also responsible for motivating and building up a team of highly skilled RF Engineers. Technical training courses were carried out by me to educate the staff members to help them understand our goals and to achieve them in the tight time frame.
PROJECT-2
Design and Development of a Transmitter and a Receiver for a Video link.
PROJECT DURATION
One year from April 98 to April 99
STAFF
Two scientists including me and two technicians.
Project Description
A FM Video Transmitter and matched Receiver for a 860 MHz Video link was designed for a ground to aerial LOS link. An onboard video camera provides the information signal to the PLO Transmitter modulator. The Transmitter was designed for a power output of 4 Watts and a frequency deviation of 6 MHz. The receiver was designed to provide a sensitivity of –85dbm and a fading margin of better than 6db.
The Design, Design verification and Simulations were carried out in a span of three months and the first prototype was ready at end of eight month. The testing, Design modifications and Document preparation were carried out in the last four months and by the end of the one year duration the final product was ready for Integration.
PROJECT –3
To develop a design procedure for generalized mm-wave triplexers.
PROJECT DURATION
Nine Months from April 2000 to January 2001.
Project Description
This project was carried out at IIT Kanpur as part of my M.Tech Thesis under the supervision of Prof. M.Sachidananda of Electrical Engineering Dept.
I developed a procedure for designing wide as well as narrow band Triplexers working from a few GHz to within mm-wave range. To verify the design procedure, a Triplexer working from 18GHz to 40 GHz was tried in a suspended stripline but unfortunately could not develop the Triplexer due to short time constraint.
PROJECT-4
Carry out interference studies on commercial GPS and generate the Frequency vs. Interference Margin data.
DURATION
Six Months from February 2001 to August 2001.
STAFF
Three scientists including me and one technician.
Project Description
To avoid interference of a Low Power L-Band Telemetry Transmitters and 1800 MHz Video Transmitter, it was desired to carry out interference studies on a commercial GPS receiver. There was no data available about the Active Antenna used in the GPS. Hence the initial studies were carried out on the GPS Kernel using a GPS simulator with signal level set at –125dbm and a signal generator as an interferer of varying power in a direct mode. The Rejection offered by the Active antenna was measured relative to the GPS center frequency of 1575.4 MHz in an anechoic chamber in radiation mode. The two readings were combined together at the desired frequencies and the interference margin was calculated. Lastly methods were proposed to increase this interference margin and a proposal was submitted to design interference cancellers for the GPS.
The task was carried out in two steps. In the first step literature survey was carried out to find out the standard methods of carrying out the test and study the particular GPS provided its Architecture, Block Diagram, Signal Flow etc. In the second step a test procedure was designed with the available resources and the test was carried out. The team members were invited to put their suggestions to carry out the testing and it was the result of the team effort that the project was carried out successfully in the proposed time.
PROJECT-5
Design of a secure communication link for an unmanned air vehicle.
PROJECT DURATION
One years from Sept 2001 to Sept 2004
STAFF
Three scientists including me and three technicians
The project includes the Design and Development of a C-Band 150 KMs LOS ground to air secure communication link which is extendable to more than 250 KMs by positioning an extra ground station. The link calculation and the design of Transmitter and Receiver is finished and first prototype is expected to be ready by March 2002. To get a secure link complex modulation schemes such as Direct Sequence Spread Spectrum is used along with QPSK modulation. The main challenges are the design of a high efficiency power amplifier to handle complex modulation schemes and the choice of a secure code.
From Sept 91 to Dec 95, I worked as member of an RF team where I carried out the Design, Development and Testing of RF modules for various projects. As a team member, I learnt to handle Microwave Instruments, CAD tools for RF/Microwave circuit design.
PROJECT-6
Design and Development of upconverter and downconverter for 155Mbps Digital Radio operating at 18 GHz.
PROJECT DURATION
One years from May 2002 to April 2003.
STAFF
Four Engineers , One Senior Engineer , One Assistant Manager.
The project includes design and development of upconverter and downconverter for SDH Transreceiver operating at 18 GHz. The upconverter accepts 155Mbps * 10 multiplexed data from ten channels. Each channel uses 32 QAM modulation scheme and occupies RF Bandwidth of 45 MHz. The final RF output power can be varied from 16dbm to 23 dbm . The downconverter is a high sensitivity(~75 dbm for BER ~ 10E-6) , low distortion, AGC controlled module operating at a frequency difference of 1010 MHz w.r.t. the transmission frequency.
All the RF modules of the transreceiver have been designed and their circuit performance has been verified. The system integration will start once all the RF modules have been fabricated.
INSTRUMENTS Experience in handling Network Analyzers, Noise Figure Meter, Spectrum Analyzers, RF Sources, Power Meter, Distortion Analyzer.
AWARDS Director’s Commendation Award in the Year 1995 for outstanding contribution in the the field of Microwave Communication.
ADE’s Young Scientist Award for the Year 1999 for outstanding contribution in the Design and Development of RF Subsystems.
QUALIFICATIONS
July’1999 –Jan’2001 M.Tech. IIT-Kanpur 9.14 CPI
(Elecrical Engg.)
Subjects: Advanced Electromagnetics Theory, DSP Programming and Architecture (TMS 320 C5X), Microwave Circuit Theory, Advanced Topics in Digital Communication (IS 95, WCDMA), Satellite Communication, Antenna Theory and Design, Communication Systems, Mobile Communication and Thesis
Topics: Design of Generalized mm-wave Triplexer.
Jan 95 – April 95 Microwave and Satellite Communication IISc Bangalore
Sept 90 – Sept 91 Technical Training Course IAT, PUNE
July’1988-May’1990 Masters in Science(Electronics) Delhi University
July’1985-May’1988 Bachelor in Science Delhi University