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Dr.
Nader Farahat
Research
Interests
Computational
Electromagnetics has become an indispensable
tool in the design and optimization of the
modern antennas utilized in advanced
communication, radar and navigation systems.
These sophisticated antennas contain
complicated geometrical features as well as
frequency-dependent material with complex
constitutional parameters and therefore
require rigorous analysis to estimate the
radiation behavior.
The
Finite Difference Time Domain (FDTD) method
is an accurate and robust numerical method
to analyze complicated antenna systems. A
single FDTD simulation can provide the
response at any frequency within the
excitation spectrum. This is the main
advantage of FDTD over the frequency domain
methods, which require one simulation for
each frequency.
However
due to the fact that this method is a
volumetric technique the memory requirement
for the accurate simulation usually exceeds
the capacity of a single computer,
particularly for phased array antennas
(commonly used with frequency selective
surfaces in radar application) and large
reflector antennas (used in satellite
communication and radio-astronomy
application). Therefore a cluster of
workstations connected in parallel is needed
to approach these practical problems. In the
recent years the popularity of the FDTD
has dramatically increased due to the use of
multi-processor computing in this method
(Parallel FDTD).
The
main research goal is to develop and use a
parallel FDTD program (in Fortran and/or C++
language) to design/analyze the large
antenna systems utilized for a variety of
applications such as communication, radar,
navigation etc.
Related
Publications
Computational
Electromagnetics Laboratory |
