Electrical Engineer Design

TUAN HUU BUI

*** ******* ***** *****

Garner, NC 27529

*******@**.**.***

Phone : 469-***-****

Sr. RF Design Engineer

Summary

RF Electrical Engineering about 10 years experience in RF Design and Product Development of

Commercial cell phones, Government Radio products, Wireless meter, and Radio BTS. Ability to work on

critical issues under significant time pressures. Recognized for attention to detail, adherence to

standards, and expert technical background. Skills include analysis of technical designs and

implementation plans. Enhanced knowledge of RF technology and industry guidelines through training

classes.

Country of Citizenship: U.S.A.

Experience

Nokia Inc., Dallas, Texas January 2009 to Present

Full-time employment.

Sr. RF Design Engineer.

Research and Development BTS

Develop multi-carrier BTS includes GSM/EDGE, WCDMA, and LTE. Responsible for the Dual band RF

Transmitter design, 900MHz and 1800MHz bands.

The responsibility includes: circuit simulation, link budget calculation, schematics, layout, design

documentation, and test report. Design with using ADS and Mentorgraphics.

Support factory for every prototype build.

Elster Integrated Solution, Raleigh, North Carolina August 2007 to January 2009

Sr. RF Electrical Design Engineer.

Research and Development Wireless Meter

Develop 2-way radio module for Electric, Gas, and Water meter. Responsible RF Transmitter, RF

Receiver from schematic to product layout, and FCC certification. The design operates in ISM band

(902-928 MHz and 2.4GHz – 2.48 GHz).

. Optimized RF Transmitter and RF Receiver of the 2-way radio module to meet low cost design

requirements and FCC requirements.

. Supported and optimized one-way radio module for water meter.

. Technical lead in EA Reference Design. Support partner’s device for in home display and providing

technical help from problem trouble shooting to FCC certification

. Technical lead in Zigbee design (IEEE 802.15.4) for in Home Display project with 2.4GHz frequency

band. The 100mW Zigbee module is a low cost design, which used to transfer data between indoor and

outdoor devices (Electric meter).

. Technical lead in 2nd Source Meter design. This 2-way radio module consist 900MHz module and

Zigbee module incorporate with meters from different suppliers of Electric meters.

L-3 Communications, Sarasota, FL August 2006 to August 2007

Full-time employment.

RF Electrical Design Engineer IV, Maritime group, Aviation Recorder Division.

Research and Develop Maritime products.

Responsible for VHF Transmitter and Receiver as well as sub-circuit designs of Maritime products from

concept prototype to product line. Responsible for schematics, layout, and test to ensure the RF

performance meets customer requirements.

Projects:

. Automation Identification System (AIS) for U.S Coast Guard: The goal is to improve RF Receiver

sensitivity for AIS Base-station.

. Airborne AIS: Research and Develop the current Transmitter design with Direct Digital Synthesizer

(DDS) from Skyworks for low cost and meet Airborne specification.

Motorola, Inc., Plantation, FL March 2002 to August 2006

Full-time Employment

Sr. RF Electrical Engineer, Advanced Technology and Strategy group, CGISS sector

Research and Development: Proof of Concepts and Prototypes.

Responsible for Receiver and Frequency Synthesizer sub-circuit designs of next generation architecture

and concept prototypes of the 2-way Radio for APCO P25 system. Responsible for schematics, layout,

and test to ensure the Receiver and Frequency Synthesizer performance meet customer requirements.

Analyzed and simulated sub-circuits with ADS, MathCAD, Math-Lab and produced test boards to

characterize their functionality prior radio board builds

• Designed and analyzed with ADS simulation for VHF, UHF, 7/800 VCOs, wide band VCO buffer,

filters, matching networks, PLL synthesizer. The PLL design used Fractional N synthesizer for wide

band frequency and low cost design. Used Colpitts and Hartley oscillators for VCO design to achieve

low phase noise wide band.

• Tested and analyzed all Vendors’ parts against Motorola Specs.

• Proficient in the use of ADS simulation, Mentor Graphics (schematic and layout), HPVEE, Lab-View,

MathCAD, Math-lab.

• Researched and developed new concepts as well as sub-circuits that provided vital solution for new

projects.

• Supported Dakota chip set certification. Programmed Tomahawk IC and LV Frac.N.

• Supported Product development team to meet ship acceptance schedule.

• Submitted 4 pattern disclosures.

• Accomplished projects: High-Speed Data Radio, Multi-band Radio, Trident IC Evaluation for multi-

band design.

Motorola, Inc, Plantation, FL January 2000 to March 2002

Full-time employment.

RF Electrical Engineer, Product Development Group, GTSS sector

Product Development: Digital Cell-phone Design

Responsible for receiver design of next generation Digital radio included implement and support High-Tier

radio to meet ship acceptance. Completed qualification of new IC parts, met all Receiver FCC

specification, and completed Receiver PQE data. Planned for upcoming milestones and prototype builds.

Followed the test plan and prioritized risks and tasks to ensure prompt completion of Receiver evaluation.

Responsible for Cost Reduction activities involving the RFMD PA, as well as the overall TX subsection.

Identified potential cost reductions in the TX section of Condor and/or Blue Jay radio.

• Qualified new LNA, Mixer, 700/800/900 MHz SAW filter, SPDT switch, IC coupler, Phototransistor.

• Automated Receiver tests with HPVEE program. Wrote HPVEE program to characterize LNA, Mixer,

and SAW filter.

• Worked closely with test engineers to ensure Radio products met all PQE requirements.

• Overcome receiver front-end performance roadblocks by providing viable solutions while not loosing

sight of cost, parts count, current drain, and schedule goals.

• Coordinated and Analyzed data from the ATE Lab for each radio prototype build and Root-caused

radio problems.

• Characterized new PA from RFMD as well as other new TX parts to improve the cost of current

shipping radios.

Education and Training

University of North Carolina, Charlotte, NC December 1999

M.S. Electrical and Computer Engineering

University of North Carolina, Charlotte, NC May 1999

B.S. Electrical and Computer Engineering

Training Courses from Motorola:

Applied RF Techniques I, II

Mentor Graphics

3G: CDMA 2000 Implementation and Operational Issues.

Digital Communications.

Radio Communications.

Understanding 802.11 Wireless LANs Protocols and Procedures.

Technical Writing.

Lithium Ion Cell Technology, Performance, and Basic Thermal Analysis.

Digital Signal Processing (DSP).

Skills

• Schematic capture and Layout tools used:

Mentor Graphics, Cadence Allegro, Altium Designer.

• Simulation tools used:

ADS, Ansoft Design, Microwave Office, Eagle-ware, MatLab and MathCAD.

• Other software used:

LabView, HPVEE, and other Windows applications.

• Equipments used:

Network Analyzer, Spectrum Analyzer, VCO/PLL Analyzer, Signal Generator (AM, FM, I/Q

Modulation), Audio Generator, Vector Network Analyzer, Oscilloscope, VSA analyzer, Arbitrary

W aveform Generator (AWG 2005), Frequency Counter, Marconi Instruments 2955 Radio

Communications Test Set, Real Time Spectrum Analyzer, Noise Figure Analyzer.

Honors and Awards

Engineering Excellent Award, Motorola, Inc

Graduated with distinction: Cum Laude, UNC at Charlotte, May 1999

Sr. Project in final list.

Early entry level in Master Program of Electrical and Computer Engineering, UNC at Charlotte, May 1998

Tau Beta Pi member, National Honor Society Engineering, Nov. 1998

Dean list, UNC at Charlotte, Nov. 1997 to Nov. 1998

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