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Publisher: Glyndŵr University Research Online
Languages: English
Types: Article
Subjects: lossy, antennas, antenna simulation, Electrical and Computer Engineering, hybrid computational electromagnetics formulation, frequency domain, dielectric volumes, equivalence principle, Computer Engineering, Signal Processing
A heterogeneous hybrid computational electromagnetics method is presented, which enables different parts of an antenna simulation problem to be treated by different methods, thus enabling the most appropriate method to be used for each part. The method uses a standard frequency-domain moment-method program and a finite-difference time-domain program to compute the fields in two regions. The two regions are interfaced by surfaces on which effective sources are defined by application of the Equivalence Principle. An extension to this permits conduction currents to cross the boundary between the different computational domains. Several validation cases are examined and the results compared with available data. The method is particularly suitable for simulation of the behavior of an antenna that is partially buried, or closely coupled with lossy dielectric volumes such as soil, building structures or the human body.
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    • [11] R. A. Abd-Alhameed and P. S. Excell, “Analysis of dielectrically-loaded wire, strip and patch antennas, using method of moments,” in Proc. IEE Conf. Computation in Electromagnetics, 1996, pp. 306-311. Raed A. Abd-Alhameed was born in Basrah, Iraq in 1959. He received the B.Sc. and M.Sc. degrees from Basrah university, Iraq, in 1982 and 1985 respectively, and the Ph.D. degree from the University of Bradford, UK, in 1997, all in Electrical Engineering. From 1997 to 1999 he was a Postdoctoral Research Fellow at the Uuniversity of Bradford, specializing in computational modeling of electromagnetic field problems, microwave nonlinear circuit simulation, signal processing of pre-adaption filters in adaptive antenna arrays and simulation of active inductance.
    • In 2000 he was appointed as a lecturer in Electronic Engineering at the University of Bradford. In August 2003 he was promoted to Senior Lecturer in Applied Electromagnetics at the same University. His current research interests include hybrid electromagnetic computational techniques, antenna design, low SAR antennas for mobile handsets, RF mixers and active antennas.
    • Dr. Abd-Alhameed is a member of the Institution of Electrical Engineers and the Institute for Learning and Teaching in Higher Education. Peter S. Excell is Professor of Applied Electromagnetics and Director of Research in the School of Informatics at the University of Bradford, UK, where he has worked since 1971. He obtained his B.Sc. in Engineering Science from the University of Reading in 1970 and his Ph.D. from the University of Bradford in 1980 for research in electromagnetic hazards. His research interests cover computational electromagnetics, EMC, antenna design and bioelectromagnetics and he has published over 200 papers; he also holds two patents. He is a Senior Member of the Institute of Electronics and Electrical Engineers, a Fellow of the Institution of Electrical Engineers and a Chartered Engineer. Mohab A. Mangoud was born in Alexandria, Egypt, in 1971. He received the B.Sc. and M.Sc. degrees, both in Electrical Engineering, from Alexandria University, Egypt, in 1993 and 1996 respectively, and the Ph.D. degree in Electronic and Electrical Engineering from the University of Bradford, UK in 2001. He is currently an Assistant Professor in the Electronics and Communications Engineering Department, Arab Academy for Science and Technology and Maritime Transport (AAST), Alexandria, Egypt, where he has worked since 1993.
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