Engineer Design

SENIOR RF / ANTENNA ENGINEER

With extensive experience in antenna design, transmitter and receiver

development

. Over 25 years experience in the field of electronics.

. 12 years R&D experience in the industry of telecommunication,

mobile and satellite, focusing on RF transmission & antennas.

. Strong academic background in microwave and electrical

engineering.

. Design, simulation, and synthesis of RF circuits in transmitters and

receivers - using ADS, GENESYS, RF DESIGNER, RFSIM, TOUCHSTONE.

. Design, simulation, and analysis of various antennas and related

circuits - IE3D, Ensemble, NEC-PRO, QUICKFIELD

. Smart antenna/near-field antenna and related technologies, design and

development. Microstrip antennas and circuits, electromagnetic

analysis using various numerical methods - HFSS, FEMAX3, MathCAD,

MatLAB

. Schematic and circuit board design - AutoCAD, OrCAD, PADS layout,

DxDesigner.

. Excellent hands-on skills - prototyping, bench tune-up and

optimization, using test equipment such as network analyzers, spectrum

analyzers, oscilloscopes, etc.

. Hard working team player, with a focus on meeting project

deadlines

. 19 technical papers published by magazine and conference

. 4 patent applications have been recently submitted and disclosed.

CAREER OBJECTIVE

To continue to make contributions in the microwave engineering fields of RF

system and antenna design

PROFESSIONAL EXPERIENCE

Zebra Technologies Corp. Vernon Hills, IL, USA February

2006 ~ Now

Position RF Engineer IV

Primary Focus: Development HF UHF RFID and Wi-Fi UWB technologies

. Adapt RFID reader, antenna, and transponders into printer configuration

using design tools such as HFSS, AutoCAD, PADS Layout, and DxDesigner.

. Designed HF RFID (13.56MHz) near field antennas like coil couplers and

miniature.

. Designed UHF RFID (900MHz) near field antennas like cross dipole, loop,

and coplanar waveguide.

. Designed Wi-Fi RTL (2.4GHz) tag antennas such as PCB dipole, circular

patch, and multi-polarized antennas.

. Designed UWB RTL (6.5GHz) tag antennas such as center-fed PCB collinear

array, tag antenna with dual polarizations. Designed super omni collinear

antennas.

Interdigital Communications Corp. Melbourne, FL, USA March 2005

~ Aug. 2005

Position: Senior Staff Engineer

Primary Focus: Research and development of smart antennas for PC CARD,

AP, and mobility.

. Enhance performance of the smart Trident antennas by using technologies

such as space- and polar-diversity, small antenna arrays, scattering- and

sub-resonant antenna elements. Tools include HFSS, MI3000 from MI

Technologies

. Developed cross-polarization MIMO antenna system used for PCMCIA card

. Development of MIMO array based on Butler Matrix

. Design helix-type dual polarization antennas for wireless

5K9H Electronics Halifax, NS, Canada

Sept. 2004 ~ Feb. 2005

Primary Focus: Consultant on RF and electronics

Seimac Limited Dartmouth, NS, Canada

Jan. 1999 ~ Sept. 2004

Position: Senior RF Engineer

Primary focus: Developing satellite communication antennas, transmitters

and receivers for new radio products

Products developed included:

Emergency Position Indicator Rescue Beacon (EPIRB)

402 MHz. GOES satellite up-link 15W 8PSK transmitter

900MHz/2.4GHz spread spectrum two-way industrial radios

. 121.5 MHz / 406 MHz military survival locator beacon (SLB)

VHF homing beacon transmitter, and direction finding receiver

Technical contributions:

. Production support for 400MHz ARGOS transmitters incl.: WILDCAT, BOBCAT,

X-CAT Troubleshooting: impedance matching, antenna characterization,

power amplifier load pull analysis, PLL frequency stability, and EMI

. Applied wide band matching techniques to solve impedance tolerance

problems for under-sized antennas

. Investigated high accuracy and high stability oscillators for use in

401MHz and 406 MHz transmitters; using VCXOs, TCXOs, OCXOs

Design and prototyping:

Designed, developed and tested medium/high power amplifiers operating at

120MHz, 400MHz, 900MHz and 2400MHz

Developed 402MHz linear 15W power amplifier achieving very high spectral

purity

LNAs and up/down converters for a receiver/transmitter, requiring very low

phase noise and high sensitivity

Adaptive antenna tuner which protects transmitter from antenna impedance

mismatch

Oscillators and phase-locked loops for use in transmitter circuits

IF/RF LC Filters, such as HP, LP, BP, notch (at 1570MHz), and duplexer

around the mixers

Microstrip coupler power detector at the power amplifier output, in a space-

constrained application, that provided automatic power level monitoring

together with an AGC loop

DDS (Direct Digital Synthesizer) has been used for frequency measurement,

frequency compensation, and frequency synthesis

Various of on-unit antennas from VHF up to 2.4GHz including: Multi-band

vertical antennas, Helical antenna for Iridium satellite unit, Sleeve

dipoles antenna for Globalstar satellite unit at 1600MHz, Low-profile blade

antenna for container ship tracking at 400MHz, Length reduced monopole

antenna for a 400MHz fishing vessel tracker

Sinclair Technologies Inc. ON, Canada

Feb. 1997 - Dec. 1998

Position: Project Engineer

Primary Focus: Antenna design, modification, and prototyping to

meet manufacturing specification Development tools included

IE3D, AutoCAD

Products developed included:

. PCS/PCN base station antennas made of patch elements

. Vertical- and dual-polarization planar antennas consisting of printed

dipoles and microstrip elements

. 12', 17', 18' (4, 8, 12 radiating elements) Microstrip linear array

antennas at 1800MHz/1900MHz

. VHF/UHF antennas

Deltec Ltd. New Zealand

Jan. 1996 - Feb. 1997

Position: Design Engineer

Primary Focus: Development of GSM/PCN planar antennas and arrays

Tools used included IE3D, ENSEMBLE, and MathCAD

. Developed and provided production support for multi-layer printed circuit

antennas and panel antennas 900MHz, 1800MHz

. Used network analysis techniques, investigated a microstrip coupler for

antenna feeding networks

. Designed and implemented a phase shifter to provide variable beam tilt

for a smart antenna array

Delft University of Technology The Netherlands Dec.

1989 - Oct. 1995

(Faculty of Electrical Engineering)

Position: Researcher

Primary Focus: Antennae and propagation, including:

. Radiation characteristics analysis of miniature waveguide radiator with

numerical methods such as Finite-Element Method (FEM). (My Ph.D theses

and several publications were based on this research)

. Calibration of an active antenna array used in remote sensing SAR.

. Design of a C-band microstrip antenna with low cross-polarization and

wide band matching (Touchstone)

Sinica Academy Beijing, China Mar. 1982 ~

Nov. 1989

Space Science and Technology Center

Position: Electronic Engineer

Primary Focus: Various project teams including work on:

. Short-distance high-altitude scientific balloon system.

. China-Japan overseas balloon flight experiment. Designed FM-PCM telemetry

system. Multi-microcomputer structure applied to remote monitoring system

on board the high-altitude scientific balloon. (This study resulted in my

M.Sc. degree from Graduate School of Sinica Academy)

. Participation in China-US cooperation on global space atmosphere

environment investigation

. Control and data collection with MCS-51 and TMS32020 (FFT) micro-

computers applied to

space electric field meter on board the satellite

. Team leader for the design of an airborne microwave scatterometer

. Developed the central control and data processing system of the

scatterometer with TMS32025

high-speed signal processor

EDUCATION

Ph.D.E.E..

Delft University of Technology, Faculty of Electrical Engineering The

Netherlands Oct. 1995

Major: Antennas and propagation

Thesis: "Characterization of Miniature Dielectric-filled Open-ended

Waveguide Antennas"

Chartered Designer

Delft University of Technology, Faculty of Electrical Engineering. The

Netherlands Nov. 1992

M.Sc E.E.

Graduate School of Chinese Academy of Sciences Beijing, China

Apr. 1986

Major: Space Electronics

Thesis: "Multi-computer Telemetry and Telecontrol System"

B.Sc. E.E.

Xian University of Electronic and Technology, Xian China

Jan. 1982

Dept. of Computer Engineering

Major: Computer applications and Telecommunication

Thesis: "The analysis of monitoring programs of microcomputers"

COMPUTER SOFTWARE SKILLS

* ADS * GENESYS * RFSIM * IE3D * Ensemble * AutoCAD * OrCAD * DxDesigner *

PADS Layout * NEC-PRO * MathCAD * Quickfield * HFSS * FEMAX3 * TOUCHSTONE *

Microsoft office * MatLAB * RF Designer

SHORT TERM Training

. CST EM simulation training by CST America, Illinois, July 2009

. Quality Awareness, Design for Six Sigma, Zebra Tech. Illinois, April 2007

. HFSS training by Ansoft, Boston, July 2005

. Digital Signal Processing by Richard G. Lyons, Dartmouth, NS, Jan. 2002

. Spread Spectrum Systems by Robert Dixon, Seimac, Halifax, Feb. 2001

DDS Seminar by Analog Devices, Halifax, NS, Aug. 1999

. Radio Receiver Design by Robert Dixon, George Washington University,

Washington DC, Oct. 1999

LANGUAGES

. Fluent in English and Chinese

Tel: 312-***-**** / 902-***-**** (h)

Email: *******@*****.***

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