High Frequency Beam Methods and Hybrid Methods for Solving Electromagnetic (EM）Wave Problems
Prof. Prabhakar H Pathak
The Ohio State University ElectroScience Lab., Dept. of ECE,
1320 Kinnear Rd., Columbus, Ohio 43212
Abstract:
The geometrical optics (GO) ray field consists of direct, reflected and refracted rays. GO ray paths obey Fermat’s principle, and describe reflection and refraction of HF EM waves, but not the diffraction of waves around edges and smooth objects, etc. Consequently, GO predicts a zero EM field within shadow regions of impenetrable obstacles illuminated by an incident GO ray field. In this talk, A UTD for edges excited by complex source beams (CSBs) and Gaussian beams (GBs) will also be briefly described; the latter may be viewed as constituting beam optical methods. A hybridization of HF and numerical methods will be briefly discussed as well.
About the Speaker:
Prabhakar Pathak: received his Ph.D (1973) from the Ohio State Univ (OSU). Currently he is Professor (Emeritus) at OSU. He 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, as well as 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 1991 – 1993. He served 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.
时间：2015-5-19星期二10：00-11：00
地点：光华东主楼1101室