Zakerhosein Firouzeh, Abolghasem Zeidaabadi-Ezhad, Hamid Mirmohammad-Sadeghi,
Volume 1, Issue 1 (1-2009)
Abstract
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MicrosoftInternetExplorer4
Abstract
A rapid calculation method of the far-field
radiation patterns of a shaped reflector antenna illuminated by a feed in an
arbitrary location is reported. In this method, the equations of geometrical
optics (GO) are used to calculate the reflected electric field using the
radiation patterns of the feed and the parameters defining the reflector
surface. These fields comprise the aperture field distribution which is
integrated over the aperture plane by Fast Fourier Transform (FFT) algorithm
based on low-size meshing of the aperture to yield the far-field radiation
patterns and to calculate other antenna parameters. Shaped Reflector Antenna
Design and Analysis Software (SRADAS) based on this numerical method can
analyze and simulate all shaped reflector antennas with large dimensions in
regard to the wavelength. SRADAS has been implemented and used in Information
and Communication Technology Institute (ICTI) to analyze and simulate different
practical parabolic and shaped reflector antennas. In order to confirm the
integrity of the proposed calculation method, two practical antennas are
analyzed using this software. The results are in good agreement with the
results obtained by commercial software (Method of Moment) and measurement.
Large shaped reflector antennas can be simulated by SRADAS fast and accurately.