Circularly polarized multi-beam lens antenna system. Comparison between 2 polarizers

Two Ka-Band circularly polarized multi-beam antenna systems are compared. In both cases, the antenna system is composed of a dielectric lens fed by circular waveguides terminated with small horns, but the circular polarization is achieved either by integrating a polarizer in the waveguide feed or by...

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Bibliographic Details
Main Authors: Letizia, M., Zurcher, J-F, Fuchs, B., Gaston, C. Z., Mosig, J. R.
Format: Conference Proceeding
Language:English
Subjects:
Antenna measurements
circular polarization
Dielectrics
Dipole antennas
Feeds
Gratings
lens antenna
Lenses
multi-beam antenna
polarizer
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Summary:Two Ka-Band circularly polarized multi-beam antenna systems are compared. In both cases, the antenna system is composed of a dielectric lens fed by circular waveguides terminated with small horns, but the circular polarization is achieved either by integrating a polarizer in the waveguide feed or by positioning a meander-line polarizer outside the lens. For this second case, an analytical model to design meander-line polarizers is proposed. The two antenna systems have been analyzed, realized, measured and compared. For both systems, an axial ratio lower than 3 dB is achieved within a bandwidth of 19%.
ISSN:2164-3342
DOI:10.1109/EuCAP.2012.6206169