A-Resume: Joseph w. Yan

Contact: adugdx@r.postjobfree.com

Joseph W. Yan RESUME

email:adugdx@r.postjobfree.com

BACKGROUND:

Veteran of: Lockheed Martin, TRW, Rockwell International, Space System Loral and Orbital Science.

Developed and delivered 2G, 2.5G 3G CDMA Radio out door unit Compliance to IS-95: (RF/RF system concentration).

Payload engineer/manager for various satellites program: Communication & TT&C payload for GEO and LEO orbits.

Oversee RF engineers and mechanical engineers in RF/RF Subsystem hardware design, such as Passive and Active Components from 500MHz to 60 GHz, from individual component to integrated assembly level (Receivers and Transmitters). Participated in team activities; design reviews, design improvement, and design verification through tests and simulation.

Developed advanced products for size, efficiency and performance/cost. In-depth/hands-on design experience of Components; such as Filters, LNA, Complex weights, Butler matrix, Receiver, Downconverter(Mixer), LO, IMUX, OMUX, and High Power Amplifier

(MPM), BFN (Beam Forming Network), Wideband Phase Shifter, HP Limiter, and etc., which encompassed the CDMA infrastructure and satellite payload system architecture RF component/Integrated Assembly design experience; Low Noise Amplifiers, Power Amplifiers, Frequency Translators, Multiplexers, Filters, High Power Limiter, Detectors, PIN diode Attenuators, Frequency Synthesizers, and Filters, frequency span from 1 GHz to 40 GHz. Simulation Tools & test equipment used: ADS, Touchstone, HFSS, Spectrum Analyzer, HP8510, Network S-parameters, all chip & wires equipment.

Participated and Designed MMIC (Microwave chips-set design) program under the DARPA/DOD effort; successfully designed and delivered Ku/Ka/44GHz band MMIC chips to the satellites program. Led following projects such as RADIO on CHIP, and Transversal Equalizer Filter on program funded project.

Publication/Patent: VWT; Virtual Wire Technology, by using phasing approach, delivering pencil sharp beam at 60 GHz.

Work Experience:

2015 (1st November) – 2022(1st September)

Yanz Technology LLC, Cupertino, California

Low Orbit Satellite system(CUBeSAT) Engineering

Link Budget study and analysis

On board RF equipment self-interference study for compliance matrix Technical Consultant/Independent Research & Development Area of Interests;

RF Components,

RF Sub/Systems,

MMIC chips,

Special Projects

Renewal Energy Technology, 2/4

Electromagnetic Energy Harvesting

and Implementation

for Ultra Speed Applications

& ETC

2014 (23rd August)-2015 (20th September)

Lockheed Martin Space System Company, Waterton, Colorado Staff RF Engineering

Supported (Military Special Program) MSP program: front-end receiver design (1 to 20 GHz) & development/hardware delivery; provided end to end RF simulation and RF budget allocation/ channel interfaces effect/potential spurious impacts. Interfaced with other engineering discipline to achieve the product delivery to the program. Provided PDR & CDR packages and supported engineering unit built.

Supported commercial satellite LOB; end-to-end simulation tool development under IR&D effort. Supported new business technical proposal activities such as JCSAT & Inmarsat program: Identified and category classification of subcontractors products for potential new program deployment in advance. Massive excavations of Lockheed Martin heritage RF products in the area of active components. Performed new business proposal preparation.

2011 (1st August)-2014 (4th August)

Blue Spectrum Corporation, Santa Clara Ave, San Jose, CA Principal RF System Engineering (Phase-Array Antenna)/CTO Designed and architected MIMO RF beam forming communication system (PA MCMs); RF equipment requirement flown down, to system level. Study Link budget analysis for various critical path (G/T, Gain/ Loss, Frequency Stability vs. phase noise, Modulation scheme vs. PA power p1dB, Compensation for ISI approach, and etc.) The system composed of Radio Card @ millimeter wave frequency, Beam Forming architecture including hardware partition, Local Oscillator, Frequency planning, and filter planning, Spurious suppression filters, Complex Weights Modules that control the multiple beams steering capability and PA supporting the beams delivery.

2008 (7th Jan)-2011 (19th July)

Space System Loral, Palo Alto, California & Ross Streamer Consultant Payload System Core Engineering

Prepared and analyzed payload link budget flow down. Updated System Integrated Budget. Prepared and delivered Volume 1 & 2 of the SOOH for satellite payload. Other activities; Resolved Receiver and Transmitter Issues, Panel level Test Requirement Review, High power impact analysis on various components, Analyzed interferences on payload due to various sources, supported PDR & CDR activity, and payload panel integration effort. Example of Payload Assignments were; EchoStar-18, Tele-Sat, and Amazona-3. 2006-2007 3/4

Orbital Science Corp. Dulles, Virginia

Payload System Engineering/Manager

Assigned AMC5R program, supported PDR and CDR effort such as budget analysis and payload block design. Reviewed and supported RF component engineers in updating and negotiate with the suppliers on technical material; for example the receiver specification requirement as well as other major equipment used in the payload. Interfaced with the customer weekly

provided report to the upper managers regarding the status of the payload progress; mostly in area involved the highest risk and recommended mitigation plan for schedule recovery and cost reduction by introduction of innovative RF solution. Updating payload financial profile vs technical achievement/progress. .

1996-2005

ITC Sunnyvale, California

Senior System Engineer CTO

Chief RF Repeater System Engineer/CTO

Designed and manufactured Fiber-Optic-Base-Station-Expander (FOBEX) system for CDMA Base-Station; 2G, 2.5G, and 3G outdoor unit.

Architected the system, achieved goal of seamlessly integrate with the existing CDMA base station without any interruption. Led a team of 13 members in various disciplines to achieve the objective given, within budget and met the schedule. Most of the RF subsystem content were designed and manufactured in-house; Power Amplifiers, transmitters, receivers, tuning- synthesizer, detectors, filters and master clock. The Radio-system met IS-95 standard and was produced in volume. The project played a major role in (CDMA) telecom infrastructure produced in volume. The project played a major role in (CDMA) telecom infrastructure development in the country of Korea. The technology was transferred to SKT under the STIC supervision, (STIC is a Venture Investment entity). 1990-1995

Rockwell International, Anaheim California

Special Products Manager

Classified Programs

Atomic clock for GPS satellite.

Lockheed Martin Corp, Sunnyvale, California

Lockheed Martin Corp., WDL, San Jose, California

Technical Staff Engineer

Supported SDI program, performed mission analysis and system requirement flow down. Managed R&D team, defined goals and outlined schedule to meet program requirement. Proposed risk mitigation and schedule recovery plan to upper managers and customer. Outlined R&D effort and funding acquisition.

Other projects involved detail design and research of as an example in the following: High frequency detectors 4/4

Multi-Chip-Module (Radio on Chip, T/R switch for phase array antenna application) Super-Low-Noise-Amplifier

Broad-band-Synthesizer

High power Limiter

Millimeter wave (>40GHz) chip design;

LNA,

Frequency Converter,

Filters, and High IP3 chip.

High power amplifier (>35GHz)

Millimeter wave components development

Corporate-Feed for Beam-Forming Network

Complex Weight for Beam-Steering Network

Transversal-Equalizer-Filter for high speed Symbol Interference Suppression Education: Oregon State University, BSE, Corvallis, Oregon Security Clearance: TS, TK and SBI (Inactivity)

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