Robert J. Burkholder
Senior Research Scientist

Campus Address:
209 ElectroScience Laboratory
1320 Kinnear Road
Columbus, OH 43212

phone: (614) 292-4597
fax: (614) 292-7297
email: burkholder.1@osu.edu

Education

Ph.D., 1989, M.Sc., 1985, B.Sc., 1984, in electrical engineering, The Ohio State University.

Biography

Dr. Burkholder received the B.S., M.S., and Ph.D. degrees in electrical engineering from The Ohio State University, Columbus, in 1984, 1985, and 1989, respectively. From 1989 to the present, Dr. Burkholder has been with The Ohio State University Department of Electrical and Computer Engineering at the ElectroScience Laboratory where he is currently a Research Scientist and Adjunct Associate Professor. His research specialty is in EM Math Modeling using high-frequency asymptotic techniques and their hybrid combination with numerical techniques to solving large-scale electromagnetic radiation and scattering problems. He is also currently involved in the area of Remote Sensing and Rough Surface Scattering, studying the scattering from targets in the presence of random rough surfaces.

Research Interests

Electromagnetic theory
Mathematical modeling of scattering and radiation
Computational electromagnetics
Radar scattering and imaging
Fast integral equation techniques
Hybrid methods
Scattering from targets on rough surfaces

Professional Memberships

Fellow of the Institute of the Electrical and Electronics Engineers (IEEE), Antennas and Propagation Society
Full Member of International Union of Radio Science (URSI) Commission B
Member of the Applied Computational Electromagnetics Society (ACES)

Publications

Journal Papers

· “On the Boundary Diffraction Wave Method for the Analytical Prediction of the Radiation from Large Planar Phased Array Antennas,” (co-authors P. Janpugdee and P. H. Pathak), Radio Science, 42(6): Art. No. RS6S26, Nov. 24, 2007.

· “60 GHz Indoor Propagation Studies for Wireless Communications Based on a Ray-Tracing Method,” (co-authors C.-P. Lim, M. Lee, J. L. Volakis and R. J. Marhefka), EURSIP Journal on Wireless Communications and Networking, Vol. 2007, Article ID 73928, 6 pages, 2007, doi:10.1155/2007/73928.

· “On the Convergence Properties of the Multiple Sweep Method of Moments,” (co-authors D. Colak and E. H. Newman), Applied Computational Electromagnetics Journal, 22(2): 207-218, July 2007.

· “The Multiple Sweep Method of Moments (MSMM) Analysis of Electromagnetic Scattering from Targets on Ocean-Like Rough Surfaces,” (co-authors D. Colak and E. H. Newman), Microwave and Optical Techology Letters, 49(1): 241-247, January 2007.

· “Radar Scattering from a Rolling Target Floating on a Time-Evolving Rough Sea Surface,” (co-author K. Jamil), IEEE Trans. on Geoscience and Remote Sensing, 44(11): 3330-3337, November 2006. (pdf)

· “A Hybrid Framework for Antenna/Platform Analysis,” Applied Computational Electromagnetics Society Journal, (co-authors R. W. Kindt, P. H. Pathak, K. Sertel, R. J. Marhefka and J. L. Volakis), Special issue on phased array antennas, 21(3): 177-195, November 2006. (pdf)

· “An Inverse Power Series for the Free-Space Green’s Function,” (co-author S. Leifer), Microwave and Optical Tech. Letters, Vol. 48, No. 3, pp. 467-471, March 2006. (pdf)

· “An Accelerated DFT-MoM for the Analysis of Large Finite Periodic Antenna Arrays,” (co-authors P. Janpugdee, P. H. Pathak and P. Mahachoklertwattana), IEEE Trans. on Antennas and Propagation, Vol. 54, No. 1, pp. 279-283, Jan. 2006. (pdf)

· “Adaptive Sampling for Fast Physical Optics Numerical Integration,” (co-author T.-H. Lee), IEEE Trans. on Antennas and Propagation, Vol. 53, No. 5, pp. 1843-1845, May 2005. (pdf)

· “Forward-Backward Iterative Physical Optics Algorithm for Computing the RCS of Open-Ended Cavities,” (co-author T. Lundin), IEEE Trans. on Antennas and Propagation, Vol. 53, No. 2, pp. 793-799, Feb. 2005. (pdf)

· “Channeling Phenomenon in Electromagnetic Forward Scattering at Low Grazing,” (co-author J. R. Smith), IEEE Trans. on Geoscience and Remote Sensing, Vol. 42, No. 8, pp. 1731-1738, Aug. 2004. (pdf)

· “Dual-MGS SVD Algorithm for Fast MoM Computations,” (co-author J.-F. Lee), IEEE Trans. on Antennas and Propagation, Vol. 52, No. 7, pp. 1693-1699, July 2004. (pdf)

· “A study of scattering from an object below a rough surface," (co-author J.T. Johnson), IEEE Trans. on Geoscience and Remote Sensing, Vol. 42, No. 1, pp. 59-66, Jan. 2004. (pdf)

· “Application of gaussian-ray basis functions for the rapid analysis of electromagnetic radiation from reflector antennas," (co-authors H.T. Chou and P.H. Pathak), IEE Proceedings on Microwaves, Antennas and Propagation, Vol. 150, No. 3, pp. 177-183, June 2003.

· “Comparison of Monostatic and Bistatic Radar Images," (co-authors J.T. Johnson and I.J. Gupta), IEEE Antennas and Propagation Magazine, Vol. 45, No. 3, pp. 41-50, June 2003. (pdf )

· “Loop Star Basis Functions and a Robust Preconditioner for EFIE Scattering Problems," (co-authors J.F. Lee and R. Lee), IEEE Trans. on Antennas and Propagation, Vol. 51, No. 8, pp. 1855-1863, Aug. 2003. (pdf )

· “Spectral Acceleration of the Generalized Forward-Backward Method," (co-authors M.R. Pino and F. Obelleiro), IEEE Trans. on Antennas and Propagation, Vol. 50, No. 6, pp. 785-797, June 2002. (pdf )

· “Low Angle Scattering from 2D Targets on a Time-Evolving Sea Surface," (co-authors M.R. Pino and F. Obelleiro), IEEE Trans. on Geoscience and Remote Sensing, Vol. 40, No. 5, pp. 1185-1190, May 2002. (pdf )

· “Feed Array Synthesis for Reflector Antennas in Contoured Beam Applications via an Efficient and Novel Gaussian Beam Technique," (co-authors H.-T. Chou and P.H. Pathak), Radio Science, Vol. 36, No. 6, pp. 1341-1351, November-December 2001.

· “Novel Gaussian Beam Method for the Rapid Analysis of Large Reflector Antennas," (co-authors H.-T. Chou and P.H. Pathak), IEEE Trans.\ on Antennas and Propagation, Vol. 49, No. 6, pp. 880-893, June 2001. (pdf )

· “Coupled Canonical Grid/Discrete Dipole Approach for Computing Scattering from Objects Above or Below a Rough Interface," (co-author J.T. Johnson), IEEE Trans. on Geoscience and Remote Sensing, Special Issue on Subsurface Sensing, Vol. 39, pp. 1214-1220, June 2001. (pdf )

· “A Monte Carlo Study of the Rough Sea Surface Influence on the Radar Scattering from 2D Ships," (co-authors M.R. Pino and F. Obelleiro), IEEE Antennas and Propagation Magazine, Vol. 43, No. 2, pp. 25-33, April 2001. (pdf )

· “Efficient Method of Moments (MoM) Formulation for Large PEC Electromagnetic Scattering Problems using Asymptotic Phasefront Extraction," (co-authors D.-H. Kwon and P.H. Pathak), IEEE Trans. on Antennas and Propagation, Vol. 49, No. 4, pp. 583-591, April 2001. (pdf )

· “A MultiBlock Generalized Forward-Backward Method," (co-authors M.R. Pino, F. Obelleiro, and J.L. Rodriguez), Radio Science, Vol. 36, No. 1, pp. 19-29, Jan.-Feb. 2001.

· “A Fast and Rapidly Convergent Iterative Physical Optics Algorithm for Computing the RCS of Open-Ended Cavities," Applied Computational Electromagnetics Society Journal, Vol. 16, No. 1, pp. 53-60, March 2001. (pdf )

· “Application of the Fast Multipole Method to the Generalized Forward-Backward Iterative Algorithm," (co-authors M.R. Pino, F. Obelleiro, and L. Landesa), Microwave and Optical Technology Letters, Vol. 26, No. 2, July 20, 2000. (pdf )

· “The Generalized Forward-Backward Method for Analyzing the Scattering from Targets on Ocean--Like Rough Surfaces," (co-authors M.R. Pino, L. Landesa, J.L. Rodriguez, F. Obelleiro), IEEE Trans. on Antennas and Propagation, Vol. 47, No. 6, pp. 961-969, June 1999. (pdf )

· “Ray Analysis of Electromagnetic Field Build-Up and Quality Factor of Electrically Large Shielded Enclosures," (co-authors D.H. Kwon and P.H. Pathak), IEEE Trans. on Electromagnetic Compatibility, Vol. 40, No. 1, pp. 19-26, February 1998. (pdf )

· “High-Frequency Asymptotic Acceleration of the Fast Multipole Method," (co-author D.-H. Kwon), Radio Science, Vol. 31, No. 5, pp. 1199-1206, September-October 1996. (pdf )

· “A Hybrid Approach for Calculating the Scattering from Obstacles within Large Open Cavities," (co-author P.R. Rousseau), IEEE Trans. on Antennas and Propagation, Vol. 43, No. 10, pp. 1068-1075, October 1995. (pdf )

· “The Application of FDTD in Hybrid Methods for Cavity Scattering Analysis," (co-authors T.-T. Chia and R. Lee), IEEE Trans. on Antennas and Propagation, Vol. 43, No. 10, pp. 1082-1090, October 1995. (pdf )

· “Generalized Ray Expansion with Elliptic Ray Tubes in Hybrid Analysis of EM Scattering by Open Cavities," (co-authors P.H. Pathak, H.T. Chou, and D. Andersh), Invited Paper, Special Issue on Electromagnetic Theory, IEICE Trans. Electronics, Japan, Vol. E78-C, No. 10, pp. 1346-1356, October 1995.

· “An Iterative Physical Optics Approach for Analyzing the Electromagnetic Scattering by Large Open-Ended Cavities," (co-authors F. Obelleiro and J.L. Rodriguez), IEEE Transactions on Antennas and Propagation, Vol. 43, No. 4, pp. 356-361, April 1995. (pdf )

· “A Reciprocity Formulation for Calculating the EM Scattering by an Obstacle within an Open-Ended Waveguide Cavity," (co-author P.H. Pathak), IEEE Transactions on Microwave Theory and Techniques, Vol. 41, No. 4, pp. 702--707, April 1993. (pdf )

· “Two Ray Shooting Methods for Computing the EM Scattering by Large Open-Ended Cavities," (co-authors R.-C. Chou and P.H. Pathak) invited paper to Computer Physics Communications - Thematic issue on Computational Electromagnetics, Vol. 68, Nos. 1-3, pp. 353-365, Nov. 1991.

· “Analysis of EM Penetration into and Scattering by Electrically Large Open Waveguide Cavities Using Gaussian Beam Shooting," (co-author P.H. Pathak), Proceedings of the IEEE, Vol. 79, No. 10, pp. 1401-1412, Oct. 1991. (pdf )

· “High Frequency Electromagnetic Scattering by Open-Ended Waveguide Cavities," (co-author P.H. Pathak), J. Radio Science, Vol. 26, No. 1, pp. 211-218, Jan.-Feb. 1991.

· “Modal, Ray and Beam Techniques for Analyzing the EM Scattering by Open-Ended Waveguide Cavities," (co-author P.H. Pathak), IEEE Transactions on Antennas and Propagation, Vol. AP-37, No. 5, pp. 635-647, May 1989. (pdf )

Book Chapters

“Iterative Methods,” Volume 3 of The Wiley Encyclopedia of RF and Microwave Engineering, (co-author J.-F. Lee) Edited by Kai Chang, John Wiley and Sons, Inc., New Jersey, 2005
“High frequency scattering,” (co-author P.H. Pathak), Scattering, edited by E.R. Pike and P. Sabatier, Academic Press, Ltd., London, 2002.
“Modal, Ray and Beam Techniques for Analyzing the EM Scattering by Open-Ended Waveguide Cavities,” (co-author P. H. Pathak), pp. 399-411 in Radar Cross Sections of Complex Objects, Edited by W. Ross Stone, IEEE Press, New York, 1990.

Thesis and Dissertation

“Backscatter Analysis of Two Conducting Inlets,” M.S. Thesis, The Ohio State University, August 1985.
“High Frequency Asymptotic Methods for Analyzing the EM Scattering by Open-Ended Waveguide Cavities,” Ph.D. Dissertation, The Ohio State University, June 1989.

Church Membership: Potters House Church of God

“With God All Things Are Possible,” – Motto of the Great State of Ohio

When the disciples heard this, they were greatly astonished and asked, “Who then can be saved?” Jesus looked at them and said, “With man this is impossible, but with God all things are possible.” (The Gospel of Matthew 19:25,26, The Holy Bible)

In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning. Through him all things were made; without him nothing was made that has been made. In him was life, and that life was the light of men. The light shines in the darkness, but the darkness has not understood it. (The Gospel of John 1:1-5, The Holy Bible)