Robert Kouyoumjian

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Robert Gordon Kouyoumjian
Born(1923-04-26)April 26, 1923
Cleveland, Ohio, U.S.
DiedJanuary 3, 2011(2011-01-03) (aged 87)
Columbus, Ohio, U.S.
Alma mater Ohio State University
Known for Uniform theory of diffraction
Awards
Scientific career
Fields Electrical engineering
InstitutionsOhio State University
Thesis The calculation of the echo areas of perfectly conducting objects by the variational method  (1953)
Doctoral advisor Victor H. Rumsey
Doctoral students

Robert Gordon Kouyoumjian (April 26, 1923 - January 3, 2011) was an American electrical engineer and physicist who was a professor emeritus at the Department of Electrical Engineering at Ohio State University. He is best known for the development uniform theory of diffraction with his doctoral student Prabhakar Pathak.

Contents

Biography

Robert Gordon Kouyoumjian was born on April 26, 1923, in Cleveland, Ohio. During World War II, he served in the United States Army Air Forces as a captain, and was trained in meteorology. Attending electronics lectures at Harvard University and Massachusetts Institute of Technology, he was involved early development of radar meteorology during this period. After the war, he completed his undergraduate education at Ohio State University, receiving a degree in engineering physics in 1948. He subsequently completed his doctoral studies under Victor H. Rumsey, receiving a PhD degree in physics in 1953 from Ohio State University. In the following year, he joined the faculty of the Department of Electrical Engineering at the same institution. He was promoted to full professorship in 1962 and retired in 1982 becoming a professor emeritus. While he remained active as an instructor for some years following his retirement, he continued his research work almost until the end of his life. He died on January 3, 2011, and was survived by three children and four grandhcildren. [1] [2]

Kouyoumjian's early work during the 1950s involved the development of variational solutions for certain classes of electromagnetic problems, which went on the become early forerunners for method of moments. His other work during this period also featured the areas of radar cross sections, antenna polarization analysis, thermal properties of electromagnetic waves, and underwater acoustics. [1] During the 1960s, his work gravitated towards asymptotic high-frequency methods, and he sought to extend the geometrical theory of diffraction, developed by Joseph Keller. Following a series of works on the topic with multiple doctoral students, he introduced the uniform theory of diffraction with his doctoral student Prabhakar Pathak in the 1970s. [3] [4] [5] [6] The theory was subsequently used in the analysis of various electrically large radiation and scattering problems in engineering, such as indoor and outdoor radio propagation. [1] In 1995, he was elected to the National Academy of Engineering, "for contributions to the development of the uniform geometric theory of diffraction and the analysis and design of antennas and scatterers." [7] He has received IEEE Centennial Medal in 1984, Antennas and Propagation Society Distinguished Achievement Award in 1999, and the IEEE Third Millennium Medal in 2000. He was a member of the Commission B of the International Union of Radio Science. [1]

Selected publications

Book chapters
Journal articles

Related Research Articles

In numerical analysis, the uniform theory of diffraction (UTD) is a high-frequency method for solving electromagnetic scattering problems from electrically small discontinuities or discontinuities in more than one dimension at the same point. UTD is an extension of Joseph Keller's geometrical theory of diffraction (GTD) and was introduced by Robert Kouyoumjian and Prabhakar Pathak in 1974.

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In physics, physical optics, or wave optics, is the branch of optics that studies interference, diffraction, polarization, and other phenomena for which the ray approximation of geometric optics is not valid. This usage tends not to include effects such as quantum noise in optical communication, which is studied in the sub-branch of coherence theory.

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References

  1. 1 2 3 4 Pathak, Prabhakar (October 2011). "In Memoriam: Robert Gordon Kouyoumjian (1923 – 2011)". IEEE Antennas and Propagation Magazine. 53 (5): 112–113. doi:10.1109/MAP.2011.6138436.
  2. ↑ "In Memoriam: Professor Emeritus Robert Kouyoumjian, 1923-2011". electroscience.osu.edu. January 11, 2011. Retrieved September 7, 2024.
  3. ↑ Pathak, P. H. (2003). Brief summary of research in high frequency methods at OSU-ESL. Antennas and Propagation Society International Symposium. doi:10.1109/APS.2003.1220345.
  4. ↑ Kouyoumjian, R. G.; Pathak, P. H. (November 1974). "A uniform geometrical theory of diffraction for an edge in a perfectly conducting surface". Proceedings of the IEEE . 62 (11): 1448–1461. doi:10.1109/PROC.1974.9651.
  5. ↑ Rahmat-Samii, Yahya (June 2013). "GTD, UTD, UAT, and STD: A Historical Revisit and Personal Observations". IEEE Antennas and Propagation Magazine. 55 (3): 29–40. doi:10.1109/MAP.2013.6586622.
  6. ↑ Balanis, Constantine A. The Contribution of Prof. Robert Kouyoumjian to Edge Diffraction and Field Transition at and Near Shadow Boundaries Using UTD (PDF). 2011 XXXth URSI General Assembly and Scientific Symposium. doi:10.1109/URSIGASS.2011.6050241.
  7. ↑ "Member: Dr. Robert G. Kouyoumjian". nae.edu. Retrieved September 7, 2024.
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