Dimensioning of a multibeam coherent photonic beamformer fed by a phased array antenna.
Dimensioning of a multibeam coherent photonic beamformer fed by a phased array antenna.
复制标题
由相控阵天线馈电的多波束相干光子波束形成器的尺寸设计。
作者：
M. Drummond;V. Duarte;A. Albuquerque;R. Nogueira;L. Stampoulidis;G. Winzer;L. Zimmermann;S. Clements;J. Anzalchi
多波束高通量通信卫星的光子辅助载荷的设计和尺寸是一个复杂的问题，必须将天线、射频和光子子系统作为一个整体来考虑，以最低的质量和功耗实现最佳的性能。本文提出了一种由相控阵天线（PAA）馈送多波束光子波束形成系统（PBS）的通信卫星的接收级的尺寸。PBS使用单一波长，并采用外差检测，使检索到的光束进行频率下转换。端到端系统建模表明，可以在不影响波束宽度的情况下，在信噪比（SNR）或功耗方面权衡PAA和PBS的复杂性。给出了一个现实场景的尺寸，表明在典型数量为100个天线单元（ae）的情况下，总功耗低于1 kW，可以实现20 dB量级的信噪比和波束串扰。
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).