Harsha Challa

**** ******** ****, ******* ******, Apt 1806, Dallas, Texas - 75252

ac3dx2@r.postjobfree.com 972-***-**** in.linkedin.com/in/harshachalla

OBJECTIVE:

Seeking a full time job in electrical engineering with focus in RF Systems/Amplifier Design/Wireless Communications.

EDUCATION:

M.S., Electrical Engineering Dec 2017

The University of Texas Dallas, Richardson, Texas GPA 3.2/4

B. Tech, Electronics and Communication Engineering May 2015

Gayatri Vidya Parishad college of engineering (Autonomous), AP, India GPA 8.3/10

TECHNICAL SKILLS:

Languages: C, C++,Matlab, MASM, VHDL

Hardware exposure: VNA, Signal Generator, Spectrum Analyzer, DSO, RF Power Meter, LCR Meter, op-amp IC741

Software packages: MS Office, AWR microwave office, Cadence, FEKO, Auto cad, FPGA, Spice, P-Spice,

H-spice, Kiel u vision, Verilog, HFSS, CST, ADS and Verilog

Relevant Coursework: Microwave and measurement design lab, RF and microwave circuits, RF and Microwave amplifier design, RFIC Design, RF Systems, Antennas and Wave propagation, DSP, Random Process, Introduction to Wireless Communications

EXPERIENCE :

Internship at Doordarshan, India Jan 2013- Jan 2014

learnt about satellite communication and terrestrial communication . Learnt about working of Earth station, Up linking and Down linking of signals, Parabolic dish antenna and components of Low Noise Amplifier.

Worked as a lab assistant in college for Microwave lab, Analog circuits lab and VLSI lab for 3 years Jan 2012 - Feb 2015

ACADEMIC PROJECTS:

Design of a two stage Low Noise Amplifier(LNA) @ centre frequency 10 GHz in AWR

Amplifier was Unconditionally stable for all frequencies, with NF measured was 1.9dB

Gain measured was 19.6dB > 18 dB(desired)& O/P return loss was 58.5 dB > 12dB(desired)

Design of MMIC Low pass filter & High Pass Filter on GaAs chip @ 5GHz cut off frequency(fc)

Rejection @ 2fc GHz was 51 dB, area was 1.24 sq.mm, cost was 2.48 $, figure of merit was

21- (Low Pass Filter)

Rejection @0.5fc GHz was 30 dB, area was 1.35 sq.mm, cost was 2.72 $, figure of merit was 20- (High Pass Filter)

RF System Project Focused on Predictive-E-Maintenance system for Industrial Machines

Two communication channels developed at 2.4 GHz and 5.8GHz centre frequency.

Noise figure for Receiver of channel 1 & channel 2 were 3.4 & 2.8

Power Added Efficiency for Transmitter 1 & Transmitter 2 was 54.2% and 42%

Developed a compact Ka band planar 3 way power divider in AWR microwave office software which uses coupled line instead of transmission line to reduce chip size specifications

insertion loss < 5.1 dB, O/P isolation > 17 dB, return loss < 18 dB and Phase difference of 4.2 degrees at fc @ 30 GHz

Design of Half wave Dipole Antenna, Half wave Monopole Antenna and Complex wire Antenna in FEKO

For Dipole Antenna,Gain is 2.15dB, Directivity is 1.64,VSWR is 1.44, Radiation efficiency is 100%, and it is Linearly polarized . For Monopole Antenna Gain is 2.15dB, Directivity is 1.62,VSWR is 1.28, Radiation efficiency is 100% and it is Linearly polarized. For Complex wire Antenna Gain is 2.1589dB, Directivity is 1.61,VSWR is 1.34, Radiation efficiency is 100% and it is Linearly polarized.

Design of Octave Bandwidth Feedback MMIC Filter in AWR Microwave Office

Operating frequency range is 2 GHz to 4 GHz, Linear gain 17dB, Gain flatness is 2 dB, Input return loss is 20dB, Output return loss is 20dB and it is Unconditionally Stable

Simulation of Adaptive Modulation in Orthogonal Frequency Division Multiplexing Systems in Matlab

Modulation type - QPSK,FFT size 256 and Cyclic prefix length 32.

Design of 0.5dB Equi-Ripple Chebyshev on FR4 substrate in AWR microwave office

2.5 GHz Frequency (fc) and rejection at 2fc was 40dB

Design and Analysis complex structure dipole antenna and compared it simple dipole

Gain = 1.67 dB, Directivity = 1.67 dB, Operating frequency = 1.2 GHz, Radiation resistance = 73Ω

Design of 3dB Maximally flat Butterworth Filter on Duroid substrate AWR microwave office

2.5 GHz Frequency (fc) and rejection at 2fc was 40dB.

Simulation of Orthogonal Frequency Division Multiplexing Physical Layer in Matlab

Modulation type - QPSK, FFT size 64 and Cyclic prefix of 8

Test, Debug and Measurement :

VNA calibration using SOLT, Familiarity with cross talk or Isolation calibration.

Characterization and Modelling SMD resistor and capacitor without port extension and De-embedding the text fixture for DUT measurements

Work Authorization : F-1 Visa

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