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Steven W. Ellingson
Associate Professor
Office: 443 Durham Hall
Spring 2013 Office Hours:
By appointment
Phone: +1 (540) 231-2978
Fax: +1 (540) 231-2968
E-mail: ellingson@vt.edu
Mail / Shipping:
432 Durham Hall (0350)
Virginia Tech
Blacksburg, VA 24061
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I am interested in antennas & propagation, applied signal processing, and radio frequency instrumentation. My work on instrumentation includes design of antennas, receivers, digital signal processing, and software for systems with unusual or extreme requirements. I work on mobile radio communications, navigation, and geolocation systems in HF through UHF bands. I am active in radio astronomy, most recently in the development of meter-wavelength observing systems and their application in cosmology, pulsars, and searches for astrophysical transients. I am currently the Associate Director and Technical Director for the LWA1 Radio Observatory, pictured above. I occasionally work on passive microwave remote sensing for geophysical applications. I advise students in the "Electromagnetics" and "Communications" areas of our department.
Research -
Teaching -
My Past -
Publications
Research
- Some Current Projects:
- Some Past Projects:
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Antenna Systems for Multiband Mobile & Portable Radio, U.S. Dept. of Justice.
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Eight-meter-wavelength Transient Array (ETA), NSF.
- Multiband/Multimode Radio for Public Safety, U.S. Dept. of Justice.
- Dark Ages Lunar Interferometer (DALI), NASA.
- RFID on Aircraft, Aerospace Vehicle Systems Insititue.
- Matrix Channel Measurement System (MCMS), NSF, w/Aeroflex Corp..
- Argus (L-band omnidirectional radio telescope array), SETI Institute.
- Technology Development for the Square Kilometer Array, NSF, w/Cornell.
- Demonstration of Interference-Suppressing Radiometry at C-Band, NPOESS, w/Ohio State. Also: More on WindSat
- Digital Receiver with Interference Suppression for Microwave Radiometry, NASA, w/Ohio State. Also: LISA
- Removing GLONASS from Radio Astronomy
- SAX, Vector/matrix channel measurements using an 8-element array at 2.4 GHz
- UAX, Direction finding using an 8-element array at 460 MHz.
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Teaching
- ECE 6116: Reflector & Aperture Antennas
- ECE 5654: Digital Communications II
- ECE 4984: RF Spectrum Sensing. (Senior capstone design course)
- ECE 4634: Digital Communications I
- ECE 4114: Antennas
- ECE 3106: Electromagnetic Fields II
- ECE 3105: Electromagnetic Fields I
- ECE 2704: Signals & Systems
- ECE 2004: Electric Circuit Analysis
- Design Techniques for Multiband/Multimode Radio (4-hour short course), Presented at Wireless@VT 2008 Wireless Summer School.
- Active Antennas (4-hour short course), Presented at Wireless@VT 2007 Wireless Summer School.
- FPGA-Based Signal Processing (4-hour short course, w/C. Patterson), Presented at Wireless@VT 2007 Wireless Summer School.
- Introduction to AOA Estimation and Detection using Arrays (12-hour short course), Prepared for an industry sponsor, 2003.
- RFI Mitigation (12-hour short course), Presented at the University of California at Berkeley, January 24-26, 2000.
- Topics in Modern Wireless Systems Design (8-hour short course), Presented at National Taiwan University, Taipei, Taiwan, April 7-8, 1999.
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My Past
Education
Ph.D., Electrical Engineering, The Ohio State University, 2000
M.S., Electrical Engineering, The Ohio State University, 1989
B.S., Electrical & Computer Engineering, Clarkson University, 1987
Employment
| 2009-Now: |
Associate Professor |
Virginia Polytechnic Institute & State University |
| 2003-2009: |
Assistant Professor |
Virginia Polytechnic Institute & State University |
| 1997-2003: |
Research Scientist |
The Ohio State University, ElectroScience Laboratory |
| 1995-1997: |
Senior Systems Engineer |
Engineering Research Associates, which was subsumed into E-Systems, then Raytheon |
| 1993-1995: |
Senior Consultant |
Booz-Allen & Hamilton |
| 1989-1993: |
Captain |
U.S. Army, active duty (various positions in a tactical signal battalion) |
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Selected Publications
A complete list is available here. Below are some highlights.
- S.W. Ellingson, G.B. Taylor, J. Craig, J. Hartman, J. Dowell, C.N. Wolfe, plus 7 others, "The LWA1 Radio Telescope", IEEE Trans. Ant. & Prop., Vol. 61, No. 5, May 2013, pp. 2540-9. Preprint Version.
- S.M.S. Hasan & S.W. Ellingson, "Integration of Simple Antennas to Multiband Receivers using a Novel Multiplexer Design Methodology", IEEE Trans. Ant. & Prop., Vol. 60, No. 3, March 2012, pp. 1550-6. Preprint Version.
- S.W. Ellingson, "Sensitivity of Antenna Arrays for Long-Wavelength Radio Astronomy", IEEE Trans. Antennas and Propagation, Vol. 59, No. 6, June 2011, pp. 1855-1863. Preprint Version.
- K.W. Hurst and S.W. Ellingson, "Path Loss from a Transmitter Inside an Aircraft Cabin to an Exterior Fuselage-Mounted Antenna", IEEE Trans. Electromagnetic Compatibility, Vol. 50, No. 3, August 2008, pp. 504-512.
- S.W. Ellingson and M. Harun, "Lateral Position Dependence of MIMO Capacity in a Hallway at 2.4 GHz," IEEE Trans. Antennas and Propagation, Vol. 56, No. 2, February 2008, pp. 515-523.
- S.W. Ellingson, G.A. Hampson, and R.K. Childers, "Argus: An L-Band All-Sky Astronomical Surveillance System", IEEE Trans. Antennas & Propagation, Vol. 56, No. 2, February 2008, pp. 294-302.
- S.W. Ellingson and J.T. Johnson, "A Polarimetric Survey of Radio Frequency Interference in C- and X-Bands in the Continental United States using WindSat Radiometry", IEEE Trans. Geoscience and Remote Sensing, Vol. 44, No. 3, March 2006, pp. 540-8.
- S.W. Ellingson, "Antennas for the Next Generation of Low Frequency Radio Telescopes," IEEE Trans. Antennas and Propagation, Vol. 53, No. 8, August 2005, pp. 2480-9.
- S.W. Ellingson and G.A. Hampson, "Mitigation of Radar Interference in L-Band Radio Astronomy", Astrophysical Journal Supplement Series, 147(1):167-176 (July 2003).
- S.W. Ellingson, J. Bunton, and J.F. Bell, "Removal of the GLONASS C/A Signal from OH Spectral Line Observations Using a Parametric Modelling Technique", Astrophysical Journal Supplement, Vol. 135, No. 1, pp. 87-93 (July 2001).
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