Project Engineer

NANDINI BADDAM Email : *************@*****.***

RF ENGINEER Phone : 480-***-****

Profile Summary

RF Engineer with 5 + years of experience in designing, building and testing equipment that generates radio frequency and microwave signals, including associated transmissions and detection systems.

Professional Experience

Wide breadth of RF measurement experience

Excellent grasp of device technology and analog circuit design.

Proficiency in planning and consolidation of competent microwave circuits

Testing, designing, and validating new products in the lab

Supporting in the research and development of new RF technologies

Providing support to the technical team and establishing design criteria

Researching and resolving technical problems found during testing and integration phases.

Involved in design, development, testing of Transmitter and Receiver.

Preparation of Schematics, high level design document, acceptance test plan, quality test plan for production.

Oversaw self design project management and upgrading.

Developing parts lists and placed orders for test systems and created documentation package including test procedures and instruction manual

Designing the Switching Circuits using TINA Software and LT spice.

Debugging any sort of technical issues in testing level from sub-module to integration level.

Involved in the Environmental tests and analyzed final performance of the system.

Look after the testing of different RF and Microwave products.

Quality Assurance of all products and their technical literature.

Knowledge of RF planning, and analyzing the data.

Design and development of various types of RF Communication modules (receivers, transmitters, RF low-noise and Power amplifiers, filters, and power-dividers) for commercial, military and space applications.

Preparation of design conceptualization, Qualification, Acceptance documents and providing manufacturing and customer support.

Determined problem sites by using network key performance indicators and drive test data.

Handled customer complaints very effectively

Sorted issues regarding thermal and heat dissipation issues

Ensured that all design specifications are followed in production process

Technical Proficiency

Hands on experience with modern testing equipments. Compatible with all type of Agilent’s VNAs, signal generator, Spectrum Analyzer, Power Meter upto 40 GHz etc.

Analysis of different Schematics by using Tina Soft Ware and Spice Simulation, Agilent’s Advanced Design System.

Ability to utilize noise analyzers required for evaluating different RF modules and circuits

Proficiency with C, Labview, and Matlab.

Proficiency in Excel, PowerPoint and other MS Office software.

Education:

Bachelor degree in Electronics and Communication Engineering

Project Experience:

Astra Microwave Products Limited, India Dec 2012 – Nov 2015

Role: RF Engineer

ASTRA is working For SAC, ISRO, BEL, RELAINCE, LRDE, DRDL, DRDO, SHAR and many more esteemed R&D organizations related to Defense & Space Communications.

Project : 01

TITLE : Online Calibration Module

CLIENT : LRDE, Bangalore

Frequency : S-Band (3.1GHz-3.5GHz).

Project scope

The main feature of this module is to provide the time delay between leakage signal and the signal which is to be calibrated. The S-Band Online Calibration Module with delay line is designed to operate at the S-Band frequency. The unit is integrated with central unit and active array antenna unit. This unit requires a DC supply of 28 Volts for its operation. The delay of 5µs is provided by using BAW delay line.

Responsibilities:

Preparation of design conceptualization, board floor plan and giving layout design guide lines to PCB designers.

Preparation of system architecture document, Selection of Components, Generation of Bill of material.

Preparation of high level design document, acceptance test plan, quality test plan for production.

Preparing and submitting schematic diagrams and testing procedures as per the direction of senior engineers.

Designing and testing the different sub modules like SPDT Switch, Amplifier, delay line, Differential Receiver, Attenuator and Band pass filter.

Designing the power supply unit which provides the 28V output power for the operation of the unit.

Debugging the technical issues in testing level to ensure the insertion loss, isolation and return losses of different path as per the specifications.

Record all the parameter readings in the integration level at different environmental conditions.

Prepared the guidelines and documents of all sub modules for production of the unit.

Project : 02

TITLE : C-Band Receiver Exciter Unit

CLIENT : BEL, Bangalore

Frequency : 5.1-5.85 GHz.

Project scope

The receiver exciter unit is the interface between Phased array antenna and programmable signal processor unit. It is mounted inside the shelter .Receiver configuration is in the form of three channels, mono pulse, gain phase matched and double conversion super heterodyne type with LNA front end. Receiver down converts the radar waveforms from C-Band to IF and sends to the PSPU. It is capable of conserving the salient characteristics of target echo, strength variations, Doppler phase shift, angle error etc while down converting to IF. The front end receiver is mounted as an integral part of the antenna feed. This unit also generates system timings and controls.

Responsibilities:

Designed the different sub modules like LO& BITE Distribution module, AC-DC Power supply unit, DC-DC Converter module and RF Bite distribution module of the receiver exciter unit.

Preparation of system architecture document, Selection of Components, Generation of Bill of material of all above mentioned sub modules.

Preparing and submitting schematic diagrams and testing procedures of the sub modules.

Preparation of high level design document, acceptance test plan, quality test plan for production.

Debugging the technical issues in testing level of LO& BITE Distribution module to ensure the insertion loss, isolation and return losses of different path as per the specifications.

Debugging the technical issues in RF Bite distribution module to ensure gain, phase difference and return losses of different paths (SUM, AZ, EL &GRD) as per the specifications.

Record all the parameter readings of different sub modules at different environmental conditions and rectify any technical issues if happens to meet the specifications.

Testing the C-band receiver exciter unit in integration level to check the spurious,harmonics, gain and phase difference etc as per the specifications provided from the client and rectify any technical issues if necessary

Record all the parameter readings in the integration level at different environmental conditions.

Prepared the guidelines and documents of all sub modules separately for production of the unit.

Project : 03

TITLE : VHF T/R MODULE

CLIENT : SHAR, Sriharikota

Frequency : 45-55 MHz

Project scope

This is a power amplifier which can give 2KW output power at VHF frequency used for space

Applications. This module is powered using 230 V AC/50 Hz mains supply. Functional Requirement of the T/R module is to select either Transmit or receive path by proper switching of I/P and O/P Switch. These T/R modules provide Power amplification for Transmit drive signals and low noise amplification to the receive signal. It also provides Amplitude and Phase control for both Transmitting and Receiving Path.

Roles and Responsibilities:

Designing system architecture and PCB layout board of the transmitter and receiver paths.

Preparing the schematics, selecting the components and generation of bill of materials.

Preparation of high level design document, acceptance test plan, quality test plan for production.

Testing the receiver path by providing required inputs and resolving the technical issues if necessary to meet the specifications.

Record the parameters like gain, attenuation, phase and return losses of the receiver path and to ensure that these parameters will not change in other environmental conditions.

Testing and debugging the transmitter path to obtain the 2KW output power.

To check the output power in all thermal conditions and ensure that it remains unaffected.

Debugging and Testing the TR module in integration level and check all the required parameters as per the specification in all conditions.

Involved in R&D and production of sub scale radar of 200 no’s

Prepared the guidelines and documents for production of 6000 TRMs.

Project : 04

TITLE : Dual Channel Receiver

CLIENT : RCI, Hyderabad

Frequency : 1.68 GHz.

Project scope

The Dual channel receiver is a coherent detector which converts the received IF signal into INPHASE (I) and Quadrature phase (Q) base band signals. It consists of two identical independent channels that work on a coherent signal of 140 MHz .The IF signal is centered around 1.68GHz.it provides 50dB gain. The unit works on 28V power supply. The RF filter in the receiver chain is designed for 3dB bandwidth of 25 MHz.

Responsibilities:

Preparation of system architecture document and Selection of Components as per the specs provided from the client.

Designing and testing the 6-bit digital attenuator by applying the required inputs.

Designing and testing the cascaded amplifiers, low pass filter, power divider and directional coupler.

Preparation of system architecture document, Selection of Components, Generation of Bill of material of all above mentioned sub modules.

Preparing and submitting schematic diagrams and testing procedures of the sub modules.

Preparation of high level design document, acceptance test plan, quality test plan for production.

Record all the parameter readings(gain, band width, attenuation, phase, amplitude and phase imbalance and dynamic range) in the integration level at different environmental conditions and rectify any technical issues if necessary.

Prepared the guidelines and documents separately for production of the unit.

AMPL, INDIA April 2010 – May 2012

Role : Internship (in RF Domain)

TITLE : SPST & SPDT SWITCH

CLIENT : SAC, Ahmadabad

Frequency: L& S Band

Project scope:

This project is mainly used in TR modules to isolate transmitting and receiving path. Depending on the input trigger it allows either transmitting path or receiving path.

Tested different modules like Circulators, Isolators, Filters, Power amplifiers, Detector diodes, IC’s from different manufacturers.

Designed and tested RF switches at different frequency bands under the guidance and supervision of senior RF engineers.

Debugging and testing the AC-DC power supplies and DC-DC converters.

Designed and tested passive power dividers at different frequencies.

Debugging and testing Low Noise Amplifiers, digital Attenuators, phase shifters etc

Testing and debugging LO Modules at 1200MHz frequency. These LO Modules are used as sub modules in weapon location radar.

Interpersonal skills

Self-starter and comfortable in high intensity and challenging work environment.

Encouraging team members at all time with positive attitude thereby enhancing their efficiencies and there by delivering the best performance from them and hence benefiting the organization.

Coordination with team members to ensure smooth implementation of changes at work place.

Possessing good leadership quality to get the work in an efficient manner.

Ability to understand, follow and enforce safety procedures.

Competitive, hardworking and a good team member with good communication skills.

Outstanding skill in coordinating with test and technical subcontract personnel manufacturing and customers.

High critical thinking and problem-solving skills.

Sound organizational and management abilities.

Strong oral and written communication skills.

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