Drummond Miguel V, Duarte Vanessa C, Albuquerque André, Nogueira Rogério N, Stampoulidis Leontios, Winzer Georg, Zimmermann Lars, Clements Stephen, Anzalchi Javad
Opt Express. 2018 Mar 5;26(5):6158-6171. doi: 10.1364/OE.26.006158.
The 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-off 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).
为多波束高通量通信卫星设计和确定光子辅助有效载荷的尺寸是一个复杂的问题，在这个问题中，必须将天线、射频和光子子系统作为一个整体来考虑，以便以最低的质量和功耗实现最佳性能。在本文中，我们提出并确定了通信卫星接收阶段的尺寸，该阶段包括为多波束光子波束形成系统（PBS）馈电的相控阵天线（PAA）。PBS使用单一波长并采用外差检测，以便将检索到的波束进行频率下变频。端到端系统建模表明，在不影响波束宽度的情况下，可以在信号-to-噪声比（SNR）或功耗方面对PAA和PBS的复杂性进行权衡。给出了一个实际场景的尺寸确定结果，表明对于典型的100个天线单元（AE）数量，在总功耗低于1kW的情况下，可以实现约20dB的SNR和波束串扰。
