Dr. Steven W. Ellingson Assistant Professor Office: 443 Durham Mailing Address: 432 Durham (0350) Virginia Tech Blacksburg, VA 24061 Tel: (540) 231-2978 Fax: (540) 231-3362 Email: Web page: http://www.ece.vt.edu/swe/

Biography:

Steven W. Ellingson received the B.S. degree in Electrical & Computer Engineering from Clarkson University, Potsdam, NY, in 1987, and the M.S. and Ph.D. degrees in Electrical Engineering from the Ohio State University, Columbus, in 1989 and 2000, respectively. From 1989 to 1993, he served on active duty with the U.S. Army. From 1993 to 1995, he was a Senior Consultant with Booz-Allen and Hamilton, McLean, VA. From 1995 to 1997, he was a Senior Systems Engineer with Raytheon E-Systems, Falls Church, VA.
From 1997 to 2003, he was a Research Scientist with the Ohio State University ElectroScience Laboratory. Since 2003 he has been an Assistant Professor in the Bradley Department of Electrical & Computer Engineering at Virginia Polytechnic Institute & State University. His research interests include a wide range of applications involving antennas & propagation, applied signal processing, and instrumentation. He is a Senior Member of the IEEE.

Research Areas:

• Transceiver Design for Wideband & Software-Defined Applications
• Smart Antennas and MIMO
  
• Interference Mitigation
  
• Emitter Detection & Geolocation
  
• Radio Astronomy and Microwave Remote Sensing
  

Selected Publications

• 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.
• N. Niamsuwan, J.T. Johnson, and S.W. Ellingson (2005), "Examination of a simple pulse-blanking technique for radio frequency interference mitigation", Radio Science, 40, RS5S03, doi:10.1029/2004RS003155.
• S.W. Ellingson and G.A. Hampson, "Mitigation of Radar Interference in L-Band Radio Astronomy", Astrophysical Journal Supp. Ser., 147(1):167-176 (July 2003).
• S.W. Ellingson, "Beamforming and Interference Canceling with Very Large Wideband Arrays", IEEE Trans. Antennas and Propagation, Vol. 51, No. 6, June 2003, pp. 1338-46.
• S.W. Ellingson and W. Cazemier, "Efficient Multibeam Synthesis with Interference Nulling for Large Arrays", IEEE Trans. Antennas and Propagation, Vol. 51, No. 3, March 2003, pp. 503-511.
• E. Ranu and S.W. Ellingson, "A Low-Cost Wideband UHF Downconverter with 5:1 Tuning Range", IEEE Trans. Instrumentation and Measurement, Vol. 51, No. 5, Oct 2002, pp. 1080-1084.
• S.W. Ellingson and G.A. Hampson, "A Subspace-Tracking Approach to Interference Nulling for Phased Array-Based Radio Telescopes", IEEE Trans.
  Antennas and Propagation, Vol. 50, No. 1, Jan 2002, pp. 25-30.
• 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 Supp. Ser., Vol. 135, No. 1, pp. 87-93 (July 2001).
• S.W. Ellingson, "Design and Evaluation of a Novel Antenna Array for Azimuthal Angle-of-Arrival Measurement", IEEE Trans. Antennas and Propagation, Vol. 49, No. 6, June 2001, pp. 971-979.