Antenna Engineer, Electrical Engineer, July 2009 - August 2022
Antenna Engineer, Supervisor Electrical Engineer, September 2022 - Present
Department of Justice - Quantico, Virginia
- Co-inventor and author of "Detection of conductive material in a thin film" Patent US9383439B2.
- Configuration management of custom software project for near-field antenna chamber control and data processing.
- Designed 15 dBi quad patch array for 6 GHz.
- Designed, prototyped and documented the Asymmetrical Hatted Vertical Dipole (AHVD) portable antenna for 14 to 30 MHz.
- Designer of various slot antennas for cellular and other microwave bands.
- Implemented counterpoise technique in vest born antenna improving average gain an honest 10 dB.
- Inventor and author of "Antenna" Patent USD798847S1.
- Inventor and author of "Mast Mountable Antenna" Patent US10468743B2 (Fixes the J-pole antenna).
- Review and confirmation of COTS antenna products from VHF to microwave frequencies.
- Subject matter expert on electromagnetics for the FBI.
- Subject matter expert on RF propagation from ionospheric and groundwave (VLF, LF, MF, HF) plus VHF, UHF and microwave.
- Technical requirements lead for planned new vehicle antenna measurement chamber.
- Womb to Tomb requirements, design, simulation, manufacturing, verification and delivery of custom antennas.
RF Consultant, May 2006 - Present
RF Analysis - Warrenton, VA -
http://www.rfanalysis.com- Radio link budget calculation for RF systems.
- Specification, design and installation of VHF/UHF repeater systems in RF heavy, hilltop facilities.
- Terrain modeling of RF links using Radio Mobile Deluxe.
Electrical Engineer, December 2003 - July 2009
Radio Frequency Electrical Engineer, February 2004 - July 2009
Electrical Engineering Group Lead, April 2004 - March 2007
Configuration Management, May 2004 - July 2009
Chief and Systems Engineer NASA/Wallops Project, September 2006 - July 2009
Aurora Flight Sciences Corporation - Manassas, VA -
http://www.aurora.aero/- Bootstrap of software and CAD file revision control system using CVS on surplus Linux machine
- Chief Engineer for a NASA Wallops cloud research payload featuring scientific quality video capture and relay via TDRSS data link.
- Contributor to several harness design efforts for four aircraft designs with emphasis on IEEE 200-1975 standardization.
- Created and executed procedures for testing GPS receivers and their antennas in flight control systems.
- Designed and constructed multi-channel analog low pass filter PC104 board
- Designed and implemented steerable antenna array for UAV C2 and Payload radio links
- Designed several antenna systems from 900MHz to 2.4GHz
- Managed group of electrical engineers.
- Performed Systems Engineering for NASA Wallops project regarding cloud research payload and flight vehicle.
- Primary RF allocation coordinator for UAV flights at government installations.
- Research, selection and utilization of battery energy storage cells including Lithium Ion Polymer, Nickel Metal Hydride and Nickel Cadmium chemistries.
- Responsible for RF link budgets for all UAV/Ground radio links.
- Schematic and PCB Design of high current power selector and router assembly using 60V switches & FETs, Altera control PLD and crowbar protection in compliance with MIL-STD-704F.
- Wrote and implemented Engineering Designers Guide to ensure young engineers lean on previous MIL, IEEE, ASME and other existing standards rather than invent their own, thus avoiding the inevitable chaos during integration.
- Wrote and implemented Software Release Procedure to connect software department output with software testing staff, software users and delivered product configuration.
Senior Electrical Engineer, November 2001 - November 2003
Aeroastro, Inc. - Ashburn, VA -
http://www.aeroastro.com/- Bootstrap of software and CAD file revision control system using CVS on surplus PC
- Designed low dropout discrete power supply circuit in satellite transponder
- Designed several microstrip PCB layouts for S, L and C band microwave radio oscillator assemblies
- Member of X Band Transponder team for NASA ST5 Satellite Mission
Senior Electrical Engineer, May 2001 - September 2001
Metrobility Optical Networks (formally Aura Networks) - Manassas, VA
- System design of new gigabit Ethernet router
Senior Electrical Engineer, August 1999 - May 2001
Transmitter Location Systems, LLC - Chantilly, VA -
http://www.tls2000.com/- Continued development of the open source VMELinux Tundra VME PCI Linux driver project
- Designed and implemented Altera programmable logic designs for all VME bus assemblies
- Designed and implemented three 9Ux160mm VME bus boards with custom P3/J3 backplane
- Designed VME bus slave circuitry using PLD and buffer integrated circuits
Electrical Engineer Consultant, January 1999 - July 2001
Contractor - Springfield, VA
- Co-wrote the Linux Astronomy-HOWTO
- Co-wrote the Linux VME-HOWTO
- Designed and implemented 100 volt piezo driver analog circuit amplifier with discrete transistors
- Designed and implemented single axis telescope controller
- Developed programmable logic code to support motion control
- Finished product installed in telescopes worldwide in association with TelescopeControl.com
Senior Electrical Engineer, November 1990 - December 1998
Interferometrics, Inc. - Chantilly, VA -
http://www.interf.com/- Designed and implemented 480VAC electrical power distribution system for interferometer site
- Designed and implemented IRIG B time code distribution system
- Designed and implemented laser interferometer detection analog circuit assembly
- Designed and implemented phase position and counting VME bus assemblies
- Electrical engineer for the Navy's Optical Interferometer Telescope project - Personal article also on Astronomy Net
- Embedded hardware design, testing and installation of VME based 9Ux900mm 37 DSP parallel processing engine.
Electrical Engineer, November 1989 - October 1990
CACI Federal - Fairfax, VA -
http://www.caci.com/- Designed and implemented analog to digital VME bus assembly with analog filtering
- Designed and implemented custom 3U VME bus enclosure and backplane
- Designed memory buffer module
Electrical Engineer, September 1987 - October 1989
American Electronic Labs - Falls Church, Virginia
- Designed and implemented automated test equipment system
- Performed environmental testing of off the shelf components
Radio Repair and Installation Technician, January 1984 - July 1987
Fairfax Radio - Fairfax, VA
- Accessed and repaired 27MHz citizen band (CB) radios
- Designed and developed 27MHz 50ohm antenna to sew in skin of hot air balloon
- Installed CB radios into mobile and aerial vehicles