Engineer Design

Ajit Rajagopalan

***-* ********** ***** ***** : 919-***-****

Raleigh, NC 27609 ****.***********@*****.***

OBJECTIVE To obtain a full time position as an antenna design/RF engineer.

SUMMARY Achieved novel antenna design solutions for ultra wideband vector antenna

systems (loops and bowties) in wireless communications and performed

channel capacity calculations. Worked extensively with EM tools including

Agilent ADS and Ansoft HFSS. Fabricated antennas using PCB milling

machines and conducted experiments using vector network analyzers (VNAs).

Conducted human body exposure studies in HFSS, designed an electric field

probe and performed calibration in tissue simulant liquid.

EDUCATION

North Carolina State University, Raleigh, NC Aug.’04 – Dec.’08

PhD, Electrical Engineering

• Thesis: Antenna design for ultra wide band communications and

frequency selective surfaces

• Advisor: Dr. Gianluca Lazzi

North Carolina State University, Raleigh, NC Aug.’02 – May ’04

Master of Science (M.S.) in Electrical Engineering

University of Mumbai, Mumbai, India Aug.’98 – Aug.’02

Bachelor of Engineering (B.E.) in Electronics and Telecommunications

EXPERIENCE

Vadum Inc, Raleigh, NC Oct.’08 – present

Senior RF Engineer

• Investigated design of E-field probes and came up with design

specifications.

• Worked with mechanical engineers and technicians in the design of the

probe.

• Calibrated E-filed probe prototypes in tissue stimulant liquid.

• Developed codes in MATLAB for radiation patterns of horizontal and

vertical dipole antennas near the earth that produce results in a fraction of

the time as that produced by simulations.

• Incorporated the radiation pattern codes in a statistical model.

Vadum Inc, Raleigh, NC Feb.’08 – Aug.’08

Intern, Project Engineer

• Studied the effect of electromagnetic radiation on the human body using

Ansoft HFSS which involved simulations using plane wave excitation and

antennas in proximity to the human body and performed SAR calculations

to determine hot spots.

• Researched IEEE standard for safety from exposure to electromagnetic

fields and determined system specifications for a SAR measurement

system.

VISA STATUS Can work for any employer enrolled in the E-Verify program till Feb. 2011

without sponsorship.

North Carolina State University, Raleigh, NC Aug.’03 – Aug.’08

Research Assistant, Department of Electrical and Computer Engineering

• Designed a center fed ultra wide band (UWB) loop antenna and a two sided

bowtie antenna operating from 3.6-8.5 GHz on ceramic substrate.

Optimized the designs with Agilent ADS simulations with fabrication on

LPKF Protomat milling machine.

• Integrated the three antennas on one substrate with low mutual coupling

between them forming a vector antenna.

• Performed channel measurements using UWB vector antennas, in a rich

scattering environment using a 3 Transmitter- 3 Receiver channel

characterization system with network analyzer and switching matrix.

• Demonstrated enhancement in UWB MIMO channel capacity using vector

antenna systems.

TECHNICAL/COMPUTER SKILLS

EM and Circuit design tools: Agilent ADS, Momentum, Ansoft HFSS

Programming languages: C, C++, Matlab, LabView, Fortran

Lab equipment: Agilent vector network analyzers (VNAs), vertical PCB prototyping milling

machines (LPKF C60), Agilent dielectric probe kit, extensive antenna fabrication and testing

experience.

SELECTED PUBLICATIONS

[1] A.Rajagopalan, G.Gupta, A.S.Konanur, B.L.Hughes and G.Lazzi, “Increasing channel

capacity of an Ultra Wideband MIMO system using Vector Antennas”, IEEE

Transactions on Antennas and Propagation, vol.55, no.10, Oct.2007.

[2] A.Rajagopalan and G.Lazzi, “A novel prototype for UWB MIMO vector antenna”,

National Radio Science Meeting, Boulder, CO, Jan. 2006.

[3] A.Rajagopalan, A.S.Konanur and G.Lazzi, “On the development of Wide Band

antenna geometries for UWB MIMO systems”, 2005 IEEE International Antennas

and Propagation Sym. and URSI North American Radio Science Meeting,

Washington D.C., June 2005.

[4] L.LoMonte, B.Elnour, A.Rajagopalan, G.Gupta, D.Erricolo and G.Lazzi, “Circularly

and linearly distributed narrowband vector antennas for direction of arrival

applications”, URSI North American Radio Science Meeting, Ottawa, Canada, July

2007.

[5] G.Gupta, A.Rajagopalan, B.L.Hughes and G.Lazzi, “Degrees of freedom in linear

array systems with finite length polarized antennas”, URSI North American Radio

Science Meeting, Ottawa, Canada, July 2007.

ACTIVITIES AND HONORS

• Eta Kappa Nu: Invited to join the honor society of Eta Kappa Nu on faculty recommendation

and served as Vice President of the student chapter during the year 2007-2008.

• Organized seminars in Matlab, PSpice and Labview for undergraduates.

• Tutored undergraduate students in Mathematics and Physics.

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