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- ItemDimensioning of a multibeam coherent photonic beamformer fed by a phased array antenna(Washington, DC : Optical Society of America, OSA, 2018) Drummond, Miguel V.; Duarte, Vanessa C.; Albuquerque, André; Nogueira, Rogério N.; Stampoulidis, Leontios; Winzer, Georg; Zimmermann, Lars; Clements, Stephen; Anzalchi, JavadThe design and dimensioning of a photonic-aided payload for a multi-beam high-throughput communications satellite is a complex problem in which the antenna, RF and photonic subsystems must be considered as a whole for achieving best performance with lowest mass and power consumption. In this paper, we propose and dimension the receiving stage of a communications satellite comprising a phased array antenna (PAA) feeding a multibeam photonic beamforming system (PBS). The PBS uses a single wavelength and resorts to heterodyne detection such that the retrieved beams are frequency downconverted. End-to-end system modeling shows that the complexity of the PAA and PBS can be traded-o for signal-to-noise ratio (SNR) or power consumption without compromising the beam width. The dimensioning of a realistic scenario is presented, showing that an SNR and beam crosstalk on the order of 20 dB are achievable with a total power consumption below 1 kW for a typical number of 100 antenna elements (AEs).