William A. Davis, Ph.D.

Professor
The Bradley Department of Electrical and Computer Engineering

Virginia Tech
616 Whittemore Hall
Blacksburg, VA 24061

Phone: 540-231-6307
E-mail: wadavis@vt.edu

EDUCATION:

	B.S. in Dept of E.E., Univ. of IL, 1969
	M.S. in Dept of E.E., Univ. of IL, 1970
	Ph.D. in Dept of E.E., Univ. of IL, 1974

HONORS AND RECOGNITION:

	Tau Beta Pi (1968)
	Sigma Tau (1968)
	Eta Kappa Nu (1968)
	Phi Kappa Phi (1969)

PROFESSIONAL MEMBERSHIPS:

	Institute of Electrical and Electronics Enginers (Antennas and Propagation Society, Microwave Theory and Techniques Society)
	International Union of Radio Science (US National Committee)
	Applied Computational Electromagnetics Society

CURRENT RESEARCH INTERESTS :

	Antennas
	Electromagnetic fields
	Microwave measurements
	Communications circuits
	Radio engineering
	Wireless applications

RECENT PUBLICATIONS:

	Seong-Youp Suh, Warren L. Stutzman, William A. Davis, Alan E. Waltho. Kirk W. Skeba, Jeffrey L. Schiffer, “A UWB Antenna with a Stop-band Notch in the 5-GHz WLAN band”, IEEE/ACES International Conference in Wireless Communications and Applied Computational Electromagnetics (Honolulu, HI), April 2005.  (Paper 05-1)
	T. Yang, W.A. Davis, “Mitigating the Transient Chirp of Conical Log-Spiral Antennas”, URSI National Radio Science Meeting (Boulder, CO), January 2005.  (Paper 05-2)
	G. Joshi, W. Davis, and W. Stutzman, “UWB Channel Dispersion, Characterization, and Modeling”, Symposium on Wireless Personal Communications (Blacksburg, VA), Poster Paper, June 2005.   (Paper 05-3)
	J. R. Thomas, Jr., X. Wu and W. A. Davis, "BISTABLE BEHAVIOUR IN MICROWAVE HEATING OF CERAMICS", 8th International Conference on Microwave and High Frequency Heating, Bayreuth, Germany, Sep 2001.
	K. Takamizawa, W.A. Davis, and W.L. Stutzman, "Novel Techniques for Analysis of Array Antennas," National Radio Science Meeting (Boston, MA), July 2001.
	K. Takamizawa, W.A. Davis, and W.L. Stutzman, "Comparison of Array Design Methods for Strongly-coupled Large Arrays Using a Network Description of Array Antennas", URSI National Radio Science Meeting (San Antonio, TX), June 2002.  (Paper 02-09)
	G. Joshi, C. Dietrich, W. Stutzman, W. Davis, D. Schaffner, H.P. Hsu, and D. Sievenpiper, "Adaptive Beamforming and Diversity Combining Measurements at 2.05 GHz Using Arrays of Four Low-Profile Wire Elements Backed with an Electromagnetic Band Gap Structure", URSI National Radio Science Meeting (San Antonio, TX), June 2002.  (Paper 02-06)
	S. Licul and W.A. Davis, "Near-Field Measurements of a 'Folded' Quadrifilar Antenna for Automotive Applications," URSI National Radio Science Meeting (San Antonio, TX), June 2002.  (Paper 02-11)

RECENT COLLABORATORS:

	J. R. Thomas, Virginia Tech (professor)
	David Colatosti. Luna Innovatons (principal investigator)
	Amir Zaghloul, Virginia Tech (professor)
	Warren Stutzman, Virginia Tech (professor)
	Elaine Scott, Virginia Tech (professor)
	Carl Dietrich, Virginia Tech (research professor)
	Seong-Yup Suh, Virginia Tech (research professor)
	Mike Bart, Virginia Tech (research associate)
	Joshi, Licul, Cummings, Nyugh, Dietze, Yang, Ko, Bachhuber, Weinke (graduate students)
	Joe Jahoda, Astron Corporation (principal investigator)
	Jeff Reed, Virginia Tech (professor)
	Mike Brueher, Virginia Tech (professor)
	Dong Ha, Virginia Tech (professor)

RECENT DISSERTATIONS IN RELATED AREA:

	Eric Caswell, Multi-Octave Spiral Arrays, 2001
	Kartik Satipati, Variational methods in FEM for Electromagnetics, 2004 expected completion
	Stanislav Licul, Pole modeling of antenna systems, 2004 expected completion
	James Lapean, Planar Arrays using Floquet Cell modeling and the Method of Moments, 1995
	Charles Bunting, Variational techniques for FEM, 1995

SHORT BIOGRAPHY:

Dr. Davis has been strongly involved numerical methods for electromagnetics as well as microwave measurements and material characterization.  In the recent years, he has been coordinating with faculty in Mechanical Engineering to develop improved material processing using microwaves.   He has also done extensive work in antenna modeling, measurement, and characterization.  The current emphasis in antenna measurement and characterization has focused on both small antennas and ones useful for ultra-wideband communications.  The emphasis on the characterization is to develop a simple model to describe the antenna transmission and pattern performance. The two basic principles guiding his research are developing a fundamental basis for the work and applying past experience in modeling and development to the current problem at hand - leading to fundamental models of the problems and measurements or simulations to support the basic models.