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Semiconductor Physics, Quantum Electronics & Optoelectronics. 2006. V. 9, N 2. P. 053-057.
Analysis of radiation patterns and feed illumination of the reflector
antenna using the physical and geometrical optics
Laboratory of Electromagnetism and Telecommunications LET
Department of Electronics
University Mentouri Constantine, Algeria
E-mail: na_merabtine@hotmail.com; bouadzdz@yahoo.fr; malekbenslama@hotmail.com
Abstract. Reflector antennas are characterized by very high gains (30 dB and higher)
and narrow main beams. They are widely used in satellite and line-of-sight microwave
communications as well as in radar. Reflector antennas operate on principles known long
ago from the theory of geometrical optics. The first reflector system was made by Hertz
back in 1888 (a cylindrical reflector fed by a dipole). The radiation fields from aperture
antennas, such as slots, open-ended waveguides, horns, reflector and lens antennas, are
determined from the knowledge of the fields over the aperture of the antenna. In this
paper, we analyzed the effects of feeds relating to the parabolic reflectors such as
waveguide and horn. We show the variations of the gain in the electric and magnetic
planes (E and H) according to the angle of incidence. In our case, we use the origin to be
at the focus.
Keywords: physical optics, geometrical optics, reflector antennas, feed illumination.
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