Member of Technical Staff/Sr. Engineer, Communications
Systems Research Section, Jet Propulsion Laboratory, Pasadena,
CA. (9/74 to present).
- Designed and developed a complex RF/microwave subsystem
to support land mobile/satellite communications experiments using
NASA's Advanced Communications Technology Satellite at 20 &
30 GHz.
- Developed a microstrip-matched, 70 watt, 1.6 GHz
linear amplifier to support L-band satellite communications experiments.
- Cognizant Engineer for two of the nine RF units
within the highly successful Magellan spacecraft's Synthetic Aperture
Radar.
- Developed an Allan Variance Stability Analyzer which measures the fractional frequency stability of the world's most stable atomic oscillators.
- Co-developed a high-performance, hybrid RF isolation amplifier which became a commercial product.
- Co-developed a Precision Signal Power Measurement
system used in the Deep Space Network. This system accurately
measured the strength of the weak signals (±0.2 dB @ -175
dBm) received by the DSN from inter-planetary probes carrying
20 Watt transmitters.
- Generated models and performed analysis to test DSN subsystem
performance.
- Designed, constructed, tested and documented R&D electronic
systems.
- Provided consulting, engineering and product development services.
- Designed and developed a series of professional, studio-quality
wireless microphone transmitters and receivers for a world leading
manufacturer and supplier of these systems. Responsible for several
innovations which were integrated into these systems including:
--- audio signal linearization in receiver circuits to compensate
for unavoidable transmitter nonlinearities.
--- development of the split-case handheld microphone/transmitter
which eliminated the external, rigid or dangling wire antennas
from these units. (This concept is now used by all competing manufacturers.)
--- developed an AGC-switched, spatial-diversity receiver system
employing multiple antennas and RF front ends to virtually eliminate
the deleterious effects of multipath reception in enclosed soundstages
and auditoriums.
- Designed, developed and delivered frequency-hopping UHF transceivers for secure, airborne voice communications.
- Developed RF and microwave frequency synthesizers designed for various low phase noise and frequency-hopping applications.
- Developed key systems and technologies incorporated in emergency lighting systems which now fly in commercial airliners around the world.
- Provided consultation and design recommendations for ELF air-to-submarine communication system (USAF contract).
- Provided consulting, design, and RF hardware development services
to a firm exploring RF interference mitigation techniques in wideband
FM systems.
- Developed an earth terminal QPSK modulator for a satellite-based
differential GPS distribution system which supports precision
farming throughout the continental US.
Received nine NASA awards for outstanding performance
& contributions.
US citizen, inactive DISCO Secret Clearance.