Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 68, Issue 9, Pages 6826-6831Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2020.2975617
Keywords
Broadband antennas; Broadband communication; Reflector antennas; Feeds; Polarization; Computer architecture; Dual band; Circular polarization (CP); dual polarization; multibeam antennas (MBAs); polarizing reflector; satellite communications
Funding
- Spanish Ministry of Economy and Competitiveness
- European Regional Development Fund [TEC2016-75103-C2-1-R, TEC2015-65353-R]
- European Space Agency ESTEC [4000117113/16/NL/AF]
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This article presents a novel low-profile broadband polarizing reflector to convert dual linear polarization (LP) into dual circular polarization (CP). The polarizing cell is based on printed dipole technology and presents a wideband performance in Ka-band. The dimensions of the printed dipoles are adjusted cell by cell to improve the reflection phase performance against variations in the incidence angles or in the cell dimensions. A 25 cm flat polarizing reflector demonstrator has been designed, fabricated, and tested. The design has been optimized for transmit (19.2-20.2 GHz) and receive (29-30 GHz) frequencies in Ka-band, but the broadband behavior of the cell provides satisfactory results also at the intermediate frequencies. The measured patterns show a good agreement with the simulations, with an axial ratio lower than 1.8 dB within the 19.2-30 GHz band. The proposed polarizing reflector can be used for novel multibeam antenna configurations to produce multispot coverage in Ka-band with a smaller number of apertures.
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