Broadband Reflectarray With High Polarization Purity for 4K and 8K UHDTV DVB-S2

A broadband spaceborne reflectarray with high polarization purity is proposed for Ultra High Definition TV (UHDTV) broadcasting for direct-to-home (DTH) applications. The provided bandwidth would allow to offer DTH and other services, while the enhanced cross-polarization performance enables the imp...

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Bibliographic Details
Published in:IEEE access 2020, Vol.8, p.100712-100720
Main Authors: Prado, Daniel R., Arrebola, Manuel, Pino, Marcos R., Goussetis, George
Format: Article
Language:English
Subjects:
Algorithms
Antenna feeds
Bandwidth
Bandwidths
Broadband
Broadband antennas
Broadband communication
Broadband reflectarray
Broadcasting
Circular polarization
contoured-beam
Contours
crosspolar discrimination (XPD)
crosspolar isolation (XPI)
Degrees of freedom
direct broadcast satellite
Frequencies
Linear polarization
Optimization
polarization purity
Purity
Satellite broadcasting
satellite communications
ultra high-definition TV
Unit cell
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Summary:A broadband spaceborne reflectarray with high polarization purity is proposed for Ultra High Definition TV (UHDTV) broadcasting for direct-to-home (DTH) applications. The provided bandwidth would allow to offer DTH and other services, while the enhanced cross-polarization performance enables the improvement of a better signal-to-interference-plus-noise ratio. The broadband design procedure is based on a multi-resonant unit cell with several degrees of freedom (DoF) and an improved multi-frequency optimization algorithm. It is divided into several stages and sub-stages in order to facilitate convergence towards a broadband, contoured-beam, high-performance design, including the cross-polarization figure-of-merit in the procedure. A one-meter contoured-beam reflectarray working in a 20% frequency band with high polarization purity is presented as an example. The antenna is designed to fulfil the requirements of a European coverage for DTH UHDTV broadcasting in dual-linear polarization. The cross-polarization figure-of-merit greatly improves after the optimization procedure in the whole band, achieving values better than 37 dB in the coverage region, providing an excellent isolation between polarizations. This procedure can also be extended to other satellite applications in dual-circular polarization.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.2999112