Experience

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  Garmin International

  • Olathe, Kansa

  • Principal Design Engineer

    • Jan 2013 - Jan 2018
    • Olathe, Kansa

    Design and test of X-Band MMIC’s and Circuits.Retired

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  Rockwell Collins

  • Cedar Rapids, Iowa Area

  • Principal Electrical Engineer

    • Oct 1992 - Aug 2012
    • Cedar Rapids, Iowa Area

    Responsible for the design, build and test of Radio Systems and Components to 5 GHz. Area of expertise, RF Circuit Boards, RF Components, MMIC’s and MCM’sPrincipal Electrical Engineer (T7) Allocated system requirements and performed detailed electrical design for the TTNT Exciter. Hardware performance verified by successful flight test. Designed SBD II Transceiver architecture using ADS and data based mixer model to guarantee first pass success of Spurious, Gain, NF and IP3 requirements. Authored the FDL PAI (PA Antenna Interface) DVT (Design Verification Test) verification and test plan. Unit performance for out of band high power rejection, loss and isolation demonstrated using ADS simulation and test. Redesigned SHAR VTF (Voltage Tuned Filter) using ADS Momentum to reduce production cost from $400 to $200 per assembly. Authored and performed SCWDL jamming test. Provided feedback and participated in correcting early test failures which resulted in a final successful test. Designed/built/tested GaN high power (+45 dBm) switches using the Nitronex process.  Corrected/upgraded GEM’s UHF exciter through an architecture change that eliminated spurious issues. Modified the PWB design to enhance isolation and EMI performance. Corrected problems with the FPGA application. Conceived six GMR MCM’s through the definition of layer stack-up and impedance requirements. Twenty layer LTCC designs used three to four MMIC’s per MCM and all worked correctly at first turn-on. Simulated/designed/tested eight GMR TQPED amplifier MMIC’s achieving state of the art broad band performance. Bandwidths of 100 MHz to two GHz (gain flat to 0.25 dB) and IP3’s greater than +40 dBm were realized. A robust active bias was used in all designs to minimize external components and assure repeatable performance.

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  Boeing Satellite Systems

  • El Seguno, CA

  • Senior Staff Engineer

    • Feb 1979 - Oct 1992
    • El Seguno, CA

    Responsible for the design, build and test of Satellite Units and Components to 20 GHz. Area of expertise Xtal Oscillator based LO multiplier chains and High Speed Digital Data Modulation. Designed 18 GHz phase locked DRO Designed dual 6.5/7.0 GHz x130/x140 multiplier chain.  Designed/built/tested the DDM (Digital Data Modulator), 5.48 GHz QPSK. Designed/built/tested Hydrogen MASER x140 Multiplier Chain, 10.23 MHz to 1432.2 MHz. Designed first generation DARPA GaAs MMIC’s switches