SpectraNet Contact

About SpectraNet

The people behind
the numbers.

Since 2004, SpectraNet has provided wireless consulting for cellular carriers, enterprise, homeland security, and government. Small by design: every engagement gets principal-engineer attention, backed by published research and a working lab.

Years in practice
22
Published papers
29
Patents
8+2 pending
Licensure
P.E. WA
JA

Jeff C. Adams, P.E.

President & Principal Engineer

Jeff Adams has over 25 years of experience in RF, microwave, and photonics technology, and has spent the last two decades designing wireless systems for network operators in the US and abroad.

Before starting SpectraNet, he was Vice President of Technology for Terabeam Corporation, responsible for technical marketing, competitive analyses, and engineering sales support worldwide, and earlier Director of Sales Engineering in Europe for free-space-optics and millimeter-wave carrier products — including product technical specifications within the European Technical Standards Institute (ETSI). He has worked with government regulatory groups in Asia, Latin America, and Europe on frequency allocations for new millimeter-wave products, twice served as a United States delegate at international telecommunication conferences, and spent three years as Director of Research & Development. Before Terabeam, he was a senior specialist engineer for ten years in R&D at the Boeing Company, leading projects in photonics, laser technology, microwaves, and electronics.

P.E. (Washington) · MSEE · CWNA · IEEE WCET · iBwave I-DAS & small-cell design, Level 1 & 2 · Extra Class radio operator · IEEE Senior Member · 29 published papers · 8 patents issued, 2 pending · LinkedIn ↗

RE

Robert Ettorre

RF Engineer

Robert Ettorre has 25 years of experience in electromagnetics — wave propagation, scattering, random media, antenna and RF design, coupling analysis, and transmission lines. His work at Boeing spans antenna signature reduction, indoor electromagnetic test-range performance, near-field array measurements, EMI techniques applied to Doppler radar, and transient analysis of lightning and high-intensity electromagnetic pulse events. He also has extensive embedded software experience supporting electromagnetic sensors and navigation systems.

MSEE, University of Washington — graduate research in EM propagation in random media under Dr. Leung Tsang and Dr. Ishimaru

MG

Mike Groseclose

GIS Expert · SpectraNet Partner

Mike Groseclose has over 27 years of mapping and GIS experience, spanning both GIS analysis and geospatial application development — from telecom fiber and coverage mapping to custom tooling.

MapInfo · ArcGIS · Vertical Mapper · Manifold GIS · Trimble Pro XR / Pathfinder Office · Python · JavaScript · MapBasic · ArcObjects · VB.NET / ASP.NET · SpatialWare SQL · Oracle PL/SQL · MS SQL Server

Research record

Published, patented, peer-reviewed.

The full record — 29 papers across IEEE, SPIE, OSA, and APS venues, and 10 patents — reproduced from decades of work in photoconductive switching, free-space optical communications, millimeter-wave radio, and quantum imaging.

Publications 29 papers · 1991–2010
  1. Sai Vinjanampathy, Jeff Adams, Barbara A. Capron, Claudio G. Parazzoli, and Jonathon Dowling, "Signal-to-noise ratio of quantum imaging using entangled photon-number states," 41st Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, Vol. 55, No. 5, May 26, 2010.
  2. Barbara A. Capron, Claudio G. Parazzoli, Jeff C. Adams, "Experimental Comparison of the Signal to Noise Ratio (SNR) of Ghost Images for Entangled and Thermal Light," OSA's 94th Annual Frontiers in Optics 2010/Laser Science XXVI, October 24, 2010.
  3. Claudio G Parazzoli, Barbara A. Capron, Jeff Adams, Kam Wai, Clifford Chan, Malcolm N. O'Sullivan, Robert W. Boyd, Jeffrey H. Hunt, "Ghost Imaging with Entangled Light — Comparison of Theory and Experiment," IQEC JTuD99, May 2009.
  4. Jeff C. Adams, "Broadband Applications Using Point-to-Point Wireless Technology," APEC Telecommunications and Information Working Group, 28th Annual Meeting, Taipei, October 2003.
  5. Jeff C. Adams, "Characteristics and Applications of 60-74 GHz Radios," 2nd Annual Wireless Broadband Forum, Cambridge, UK, November 25, 2003.
  6. Eric C. Eisenberg, Jeff C. Adams, and Carrie S. Cornish, "Measurement by reflection analysis of optical attenuation through windows," Proc. SPIE 4530, Optical Wireless Communications IV, November 27, 2001.
  7. Eric Y. Chan, Jeff C. Adams, Jonathan M. Saint Clair, Kenneth A. Morrison, and Martin Sosa, "Application of COTS high-speed 980-nm pump laser diode and driver for free-space laser communication terminal," SPIE Proceedings on Digital Wireless Communication, Orlando, Florida, Vol. 3708, p. 79, May 4, 1999.
  8. Eric Y. Chan, Jeff C. Adams, Jonathan M. Saint Clair, Kenneth A. Morrison, and Martin Sosa, "Application of COTS high-power laser diodes and driver for a free-space laser communication terminal," SPIE Proceedings on Free Space Laser Communications Technologies, Vol. 3266, 54, January 24, 1998.
  9. J. C. Adams, R. A. Falk, S. G. Ferrier, and C. D. Capps, "Electro-optic Imaging of Internal Fields in (111) GaAs Photoconductors," IEEE Trans. on Electron Devices, Vol. 42, p. 1081, June 1995.
  10. R. A. Falk, J. C. Adams, C. D. Capps, S. G. Ferrier, and J. A. Krinsky, "Electro-optic Imagery of High-Voltage GaAs Photoconductive Switches," IEEE Trans. on Electron Devices, Vol. 42, p. 43, January 1995.
  11. R. A. Falk, J. C. Adams, C. D. Capps, J. A. Krinsky, and S. G. Ferrier, "Direct Electro-optic Measurements of the Internal Fields of GaAs Photoconductive Switches," SPIE Proceedings on Optically Activated Switching, Vol. 2343, p. 2, January 4, 1995.
  12. L. Mu, W. R. Donaldson, J. C. Adams, and R. A. Falk, "Interactions Between Electromagnetic Fields and Laser Induced Electron-Hole Plasmas in GaAs," SPIE Proceedings on Optically Activated Switching, Vol. 2343, p. 107, January 4, 1995.
  13. R. B. Darling, R. A. Falk, C. D. Capps, and J. C. Adams, "Pre-Firing Electric Field Distribution in Semi-Insulating GaAs Bulk Avalanche Switches," SPIE Proceedings on Optically Activated Switching, Vol. 2343, p. 60, January 4, 1995.
  14. R. A. Falk, C. D. Capps, and J. C. Adams, "Tunable Photoconductive Switch Based Microwave Source," SPIE Proceedings on Optically Activated Switching, Vol. 2343, p. 187, Boston, 1994.
  15. J. C. Adams, S. G. Ferrier, R. A. Falk, and C. D. Capps, "Electro-optic Measurement of GaAs switch voltage during optically activated avalanche," IEEE Trans. on Electron Devices, Vol. 41, p. 660, May 1994.
  16. C. D. Capps, R. A. Falk, and J. C. Adams, "Time dependent model of optically activated GaAs switch," J. Appl. Phys., Vol. 11, Dec. 1, p. 6645, December 1993.
  17. J. C. Adams, C. D. Capps, R. A. Falk, and S. G. Ferrier, "Below band-gap electroabsorption in Si-GaAs," Appl. Phys. Lett., p. 633, 1993.
  18. J. C. Adams, R. A. Falk, C. D. Capps, and G. Bohnhoff-Hlavacek, "Characterization of current filamentation in GaAs photoconductive switches," SPIE Proceedings on Optically Activated Switching, Vol. 1873, pp. 10–20, Los Angeles, 1992.
  19. C. D. Capps, R. A. Falk, and J. C. Adams, "Time-dependent model of optically activated GaAs switch," SPIE Proceedings on Optically Activated Switching, Vol. 1873, pp. 174–184, Los Angeles, 1992.
  20. R. A. Falk, J. C. Adams, S. G. Ferrier, and C. D. Capps, "Dynamic Optical Probing of High-Power Photoconductors," Proceedings of the IEEE Ninth International Pulsed Power Conference, 1993.
  21. H. Helava, M. Herman, C. Leung, J. Oicles, L. Ragle, S. Wessman, R. A. Falk, J. C. Adams, and S. J. Davis, "Bulk avalanche semiconductor switches (BASS) for high resolution ultra-wideband radar (UBWR) applications," SPIE Proceedings on Optically Activated Switching, Vol. 1873, Los Angeles, 1992.
  22. R. A. Falk, J. C. Adams, H. I. Helava, M. H. Herman, C. S. Leung, and R. A. Lewis, "Study and application of the Bulk Avalanche Semiconductor Switch (BASS)," SDIO/NRO, Baltimore, Maryland, 1992.
  23. T. P. Pearsall, J. C. Adams, J. E. Wu, B. Z. Nosho, C. Aw, and J. C. Patton, "Time-resolved photoluminescence in anodically etched silicon," J. Appl. Phys., Vol. 71, pp. 4470–4474, 1992.
  24. T. P. Pearsall, J. C. Adams, J. N. Kidder, P. S. Williams, S. A. Chambers, J. Lach, D. T. Schwartz, and B. Z. Nosho, "Bright visible photoluminescence in thin silicon films," Thin Solid Films, Vol. 222, p. 200, 1992.
  25. J. C. Adams, T. P. Pearsall, J. E. Wu, B. Z. Nosho, C. Aw, and J. C. Patton, "Time-resolved photoluminescence in anodically etched silicon," International Conference on Electronic Materials, June 1992.
  26. J. C. Adams, R. A. Falk, C. D. Capps, and S. G. Ferrier, "Current filamentation in GaAs photoconductive switches," 19th International IEEE Conference on Plasma Science, Tampa, Fla., June 1992.
  27. J. C. Adams, R. A. Falk, C. D. Capps, and S. G. Ferrier, "Dark current characterization of GaAs photoconductive switches," SPIE Proceedings of the Optically Activated Switching Conference, Vol. 1632, pp. 110–119, 1992.
  28. R. A. Falk, J. C. Adams, and G. Bohnhoff-Hlavacek, "Optical Probe Techniques for Avalanching Photoconductors," Proceedings of the IEEE Eighth International Pulsed Power Conference, pp. 29–32, 1991.
  29. R. A. Falk and J. C. Adams, "Temporal model of optically initiated avalanche switches," SPIE Proceedings on Optically Activated Switching, Vol. 1378, p. 70, 1991.
Patents 8 issued · 2 pending
  1. "Relativistic Semiconductor Plasma Wave Frequency Up-Converter," Patent No. 5,323,024.
  2. "Relativistic Semiconductor Plasma Wave Frequency Up-Converter with Energized Portion," Patent No. 5,428,226.
  3. "Laser Pulse Synthesizer," Patent No. 5,448,417.
  4. "Voltage Stand Off Characteristics of Photoconductor Devices," Patent No. 5,508,625.
  5. "Method and Apparatus for Polarization Tracking in Wireless Optical Communication Systems," Patent No. 6,490,070.
  6. "Method and Apparatus for Tone Tracking in Wireless Optical Communication Systems," Patent No. 6,483,621.
  7. "Apparatus and Method to Measure Light Attenuation Through a Window," Patent No. 6,603,554.
  8. "Tone modulation for out-of-band communication in a free-space optical communications link," Patent No. 6,941,076.
  9. "Method for Wireless Cell Site Collocation Optimization," patent pending.
  10. "Apparatus and Method for Low Latency Wireless Messaging," patent pending.

Resources

Professional tools, working lab.

Design software

  • PathLoss 5.0 — all modules
  • iBwave — propagation, collection & optimization
  • MapInfo · Google Earth Pro · Delorme Topo
  • SEAMCAT Monte Carlo spectrum analysis
  • Zemax optical design · EZNEC FEM
  • MathCad · Octave · LabView
  • HF ionospheric propagation models

Test equipment

  • 1 Gsps digital oscilloscope, LabView-controlled
  • Portable spectrum analyzer to 6 GHz
  • Directional noise finder with Yagi antenna
  • Arbitrary function generator · counters · supplies
  • RF switches, dividers & attenuators
  • HF/VHF radios and antennas

Field experience

  • JDSU RAN Advisor — I-DAS performance testing
  • PCTEL — CW testing
  • EXFO — fiber testing
  • Rohde & Schwarz spectrum analyzers
  • C · Visual Basic · Excel VBA · LabView

Work with the engineers directly.

No account managers, no hand-offs — the people on this page do the work.

Email info@spectranet.net
Office
2632 29th Ave. W.
Seattle, WA 98199
Phone
206.790.0295