Lijun Han
Phone: 913-***-****
Overland Park, KS, 66213
Email: abl7qd@r.postjobfree.com
OBJECTIVE Seeking a fulltime electrical engineer position in the area of
embedded system design, radio frequency circuit design and
mixed signal design.
PROFILE Solid background in both electrical and mechanical engineering
with more than 10 published technical papers.
Strong technical understanding and analytical skills with
practical project experiences in embedded system, RF and mixed
signal design, EMC/EMI test and analysis.
Hands-on skills and knowledge in high frequency measurement
and test, and proficiency in the use of measurement tools
including network analyzer, spectrum analyzer, oscilloscope,
and signal generator.
Energetic, self-motivated, responsible and fast learning
characters and ability to work effectively in a team
environment.
WORK Hardware Design Engineer at Garmin International Inc
EXPERIENCE Aug. 2007 - present
Aviation RF Communication Module Design Project
Redesigned aviation communication receiver module and replaced
obsolete Intel microprocessor with TI ARM7 processor for
existing product. Experiences including RF receiver front end
analysis, RF filter design, impedance matching network design,
IF amplifier replacement, IF AGC design, phase locked loop
analysis, microprocessor selection, microprocessor
implementation in aviation product.
Familiar product hardware development lifecycle, related work
including creating minimum system performance specifications,
product schematics and prototype PCB layout, working with
factory for prototype board build, conducting prototype board
bench test and debug.
Conducted product standard requirements test, minimum
performance test and environment condition tests for FAA
compliance including conducted emission, radiated emission, RF
susceptibility, lightning, audio noise susceptibility, ESD,
signal induced susceptibility, and temperature tests.
Documented product technical standard order (TSO) test results
and prepared technical test reports for FAA certification.
DSP Based Aviation Audio Control System Design Project
Participated in DSP based audio control system design,
including ADC/DAC DSP module implementation, clock signal
distribution design, clock signal integrity and timing
analysis, discrete IO, audio filter and amplifier circuitry
design.
Developed audio control system hardware test program for DSP
chip (Blackfin) including writing interface drivers for UART,
SPI, SPORT, Parallel Port, I2C, and GPIO using C language in
Visual DSP. The program implemented timer, watchdog,
interruption, and DMA. Other test program developed for
digital communication D8PSK receiver including DSP filter,
signal correlation, audio noise squelch and audio mixer,
ARINC429 transceiver.
Worked with vendors and suppliers in parts selection,
coordinated with software group and system group in product
development, wrote software program guide, and supported
system group in system level test.
Graduate Research Assistant at UMR EMC Lab
Jan. 2006 - Aug. 2007
Freescale 8-bit Microcontroller EMI/ESD Test Project
Conducted direct power injection and current coupling
measurement to evaluate the microcontroller EMI and immunity
to ESD events. Experience including: 4-layer EMC test board
design, probe parameter characterization, S-parameter
extraction using vector network analyzer, IC high frequency
current measurement and IC time domain reaction measurement
using oscilloscope.
Worked on extracting microcontroller IC parameters and
simulated the IC reactions to ESD events using PSPICE model.
Wrote C and assemble code for 8-bit microcontroller to detect
and record microcontroller behaviors in the ESD events.
Coordinated with Freescale EMC research group and reported
research progress regularly by preparing technical reports and
making presentations.
RF/Analog and Digital Circuit Design: Phase-Magnitude
Detection System Project
Involved in design and implementation of high frequency phase
and magnitude detection circuit, selected and tuned the
components, tested and debugged the PCB. The circuit consisted
of LNA, mixer, amplifier, RF filters, A/D converter, PLL,
phase shifter, power splitter, voltage controlled attenuator,
logarithm detector and etc.
Developed the control program to automatically test the
phase-magnitude detection system using the GPIB and acquire
the data using external NI A/D converter card.
3D Positioning System Development and Integration Project
Assisted to select, test and align the mechanical and motion
part of the 3D positioning system, including the rotary servo
motor and linear servo motor.
Developed the software using C++ to control the 3D positioning
system through the CAN Bus communication based on CAN Open
protocol.
Product Design Engineer at Meramec Group
Mar. 2005 -- Jul. 2005
Created products 2D and 3D geometry modeling for machining
using AutoCAD and Solidworks.
Software Design Engineer
Apr. 1998 - Jan. 2000
NeTrue Communication Inc., China
Worked in software group to develop IP phone Gateway program
based on TCP/IP protocol and Winsock in windows Visual C++
environment using MFC library.
COURSEWORK High Speed Digital Design Antenna and
Propagation
VLSI Design High
speed and RF design
Computational Electromagnetic Advance VLSI Design
Circuit and Network Analysis Mixed Signal
Design and Signal Integrity
EDUCATION M.S. Electrical and Computer Engineering (GPA 4.0)
Aug. 2007
University of Missouri-Rolla
PhD. Mechanical Engineering (GPA 4.0)
Dec. 2004
University of Missouri-Rolla
M.S. Engineering and Computer Graphics
Feb. 1998
Zhejiang University, P.R. China
B.S. Mechanical Engineering (Minor in Electrical Engineering)
Jul. 1995
Zhejiang University, P.R. China
PUBLICATIONS Available upon request
REFERENCES Available upon request