This paper proposes a Ka-band receiver front-end for future CubeSats Low-Earth Orbit (LEO) to Geostationary (GEO) inter-satellite links. The receiver is able to support very high data rates (up to 100 Mbit/s) in Quadrature Phase-Shift Keying (QPSK) when in the line of sight of a GEO satellite that is equipped with a steerable 70-cm antenna and transmitting a 25-W signal. The originality of the proposed approach is twofold. First we will demonstrate the receiver feasibility based on a class of miniaturized and low-cost microwave integrated circuits, currently available on the market. In particular, our receiver is based on a novel combination of integrated Low-Noise Amplifiers (LNA) with an image rejection filter, the latter exploiting the Substrate Integrated Waveguide (SIW) technology. An optimization of the via placement proved to be able to reduce the need for shielding apparatuses, thus simplifying the mechanics and reducing mass, volume and hardware costs. Secondly, we will propose a noise injection circuit capable of measuring and calibrating the receiver gain, also during in-orbit operation. Self testing capabilities are particularly relevant for CubeSats because the usage of commercial components poses serious reliability issues.

中文翻译：

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轨道交通应用中 IPMSM 无传感器驱动器的整体系统延迟补偿方法


本文提出了一种用于未来 CubeSats 低地球轨道 (LEO) 到对地静止 (GEO) 卫星间链路的 Ka 频段接收器前端。当位于配备可操纵 70 厘米天线的 GEO 卫星视线范围内并发射25W 信号。所提出的方法的独创性是双重的。首先，我们将展示基于目前市场上可用的一类小型化和低成本微波集成电路的接收器的可行性。特别是，我们的接收器基于集成低噪声放大器 (LNA) 与镜像抑制滤波器的新颖组合，后者利用了基板集成波导 (SIW) 技术。事实证明，通孔布局的优化能够减少对屏蔽装置的需求，从而简化机械结构并降低质量、体积和硬件成本。其次，我们将提出一种噪声注入电路，能够在在轨运行期间测量和校准接收机增益。自测试能力对于 CubeSats 特别重要，因为商业组件的使用会带来严重的可靠性问题。