SiGe微波单片低噪声放大器重离子辐射损伤与电磁干扰协合效应机理研究

为探索近地空间典型轨道SiGe MMIC LNAs重离子辐照损伤与电磁干扰（EMI）协合效应性能退化机理，根据重离子与介质作用机制及EMI热电效应机理，探索LNAs重离子辐照损伤与EMI协合效应模拟及实验测量方法。拟采用数值方法、蒙卡模拟及电路仿真等多尺度耦合方法，模拟分析LNA关键性能参数随重离子辐照条件、EMI源项特征及注入位置等因素的变化，模拟分析重离子辐射损伤对LNA EMI敏感性影响机制。其次，根据典型近地空间轨道重离子分布特征参数，拟采用加速器重离子束源、α源开展LNAs重离子辐照损伤与EMI协合效应实验研究，测量分析LNA关键性能参数随重离子辐照条件、LNA工作条件等因素的变化特征，检验完善模拟物理模型。综合分析模拟及试验结果，揭示LNAs重离子辐照损伤与EMI协合效应致特性参数演变物理机制及关键影响因素；为星载SiGe MMIC LNAs工作性能预估及优化防护设计奠定基础。

For exploring the performance degrading mechanisms of the SiGe MMIC LNAs induced by the synergistic effects which produced by heavy particles irradiation damage combined with electromagnetic interference(EMI), the theoretical simulation methods and experimental techniques for evaluating the synergistic effects of LNAs induced by heavy particles combined with EMI will be explored to set up based on the mechanisms of heavy particles interacting with target materials and the thermoelectric effects induced by EMI in targets. The multi-scale coupling simulated methods including Monte Carlo calculation, numerical and circuits simulation will be used. The key parameters of LNA changed with the factors including the heavy particle irradiation conditions, EMI source characteristics and its injection positions in LNA, etc. will be simulated and analyzed. The sensitive responses mechanisms of LNA to EMI impacted by radiation damage effects of heavy particles will be simulated and compared. Meanwhile, based on the characteristic distributions of heavy particles in the typical near earth space orbit, the synergistic effects of EMI combined with heavy particles radiation damage will be experimentally studied with heavy ion beam of accelerator and alpha irradiation sources. The key parameters’ characteristics of the experimental LNAs changed with the heavy ion irradiation condition and the LNA operating modes, etc. will be measured and analyzed. The physical simulation models will be checked and developed. Finally, the simulated and experimental results will be summarized for aggregate analysis. The microscopic physical mechanisms for the tested SiGe LNAs’ characteristic parameters’ evolvement induced by the synergistic effects described above and the key influence factors will be exploded to reveal. The future expected research results in the present project will try to establish the foundation for evaluating the performance of SiGe LNA working in space extreme radiation environment and optimizing the designs.