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Dr. Titipong Lertwiriyaprapa   
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Workshop 3

Use of EM Beams for the Efficient Simulation of Antenna and Scattering Problems
NameProf. Prabhakar Pathak
AffiliationThe Ohio State University, USA and University of South Florida, USA

Biography :

Prabhakar Pathak received his Ph.D (1973) from the Ohio State Univ (OSU). Currently he is Professor (Emeritus) at OSU. He is also a Courtesy Professor and an Adjunct Professor at Univ. of South Florida. Prof. Pathak is regarded as a co-developer of the uniform geometrical theory of diffraction (UTD). His interests continue to be in the development of new UTD solutions in both frequency and time domains, as well as in the development of fast Beam and Hybrid methods, for solving large antenna/scattering problems of engineering interest. Prof. Pathak has been actively presenting short courses and invited talks at conferences and workshops both in the US and abroad. He has authored/coauthored over a hundred journal and conference papers, as well as contributed chapters to seven books. Prior to 1993, he served two consecutive terms as an Associate Editor of IEEE Trans.AP-S. He was appointed as an IEEE (AP-S) Distinguished Lecturer (DL) from 1991-1993. Prof. Pathak was also appointed as the chair of the IEEE AP-S DL program during 1995 – 2005. He served as a member of the IEEE AP-S AdCom in 2010. He received the 1996 Schelkunoff best paper award from IEEE-AP-S; the ISAP 2009 best paper award; the George Sinclair award (1996) from OSU ElectroScience Laboratory; and, IEEE Third Millennium Medal from AP-S in 2000. Prof. Pathak received the Distinguished Achievement Award from IEEE AP-S in 2013. He is an IEEE Life Fellow, and a member of URSI-commission B.

Abstract :

It is well known from the independent works of Keller, Deschamps, and Felsen, respectively, that an electromagnetic (EM) point current source positioned in complex space produces a beam wave field which is highly localized about its forward propagation axis. It is noted that the EM field of a complex source beam (CSB) constitutes an exact solution of Maxwell's equations, and it is simply obtained by an analytic continuation of the exact closed form expression of the EM field for a point current in real space, where the real source coordinates are replaced by complex values. In its paraxial region, a CSB automatically reduces to a Gaussian Beam (GB). By controlling the values of the complex source coordinates, one can produce either a CSB with a very broad ( not well focused ) beam or a very narrow ( highly focused ) beam; consequently, such a CSB field can be made to pass smoothly from the field of a real point source to a plane wave field. It is clear that CSBs can serve as highly useful basis functions to represent EM fields, and indeed they have been used in this fashion by some researchers in this area. Here, additional useful methods for developing convergent CSB expansions to represent the fields of EM sources, via appropriate EM equivalence theorems, will be illustrated. Applications of such CSB expansions to analyze a class of electrically large practical antenna and scattering problems will be presented to demonstrate their utility.

Important Dates

    Paper Submission Deadline:

May 1, 2017

May 15, 2017

May 31, 2017

(Hard deadline)

12:00 am(Thailand standard time)


    Notification of Acceptance :

August 1-6, 2017


    Early Bird Registration Deadline:

August 31, 2017

September 4, 2017 (Extend)