有源子阵结构集成度高、电讯功能复杂,是影响有源相控阵天线维修性的重要因素。文中展示了一种高集成模块化X频段天线有源子阵。通过在子阵上设计安装导向装置,提高了有源子阵重复拆装的可靠性。利用分层盲插设计,避免了子阵装配维修过...有源子阵结构集成度高、电讯功能复杂,是影响有源相控阵天线维修性的重要因素。文中展示了一种高集成模块化X频段天线有源子阵。通过在子阵上设计安装导向装置,提高了有源子阵重复拆装的可靠性。利用分层盲插设计,避免了子阵装配维修过程中的连接器误接错插问题。基于模块化维修设计思路,在子阵内部合理定义现场可更换单元(Line Replaceable Unit, LRU),保障了子阵集成模块的互换性,提高了现场基层维修的效率。以平均修复时间(Mean Time To Repair, MTTR)为指标对有源子阵的维修性进行分析,结果表明该子阵满足X频段相控阵天线快速维修性的设计要求。展开更多
The system of a true-time delay line for X-band and 8-unit phased array antennas is introduced. Changing the length of a chirp grating with piezotranslator(PZT), the variable delay is obtained. The scheme is applied t...The system of a true-time delay line for X-band and 8-unit phased array antennas is introduced. Changing the length of a chirp grating with piezotranslator(PZT), the variable delay is obtained. The scheme is applied to X-band phased array radar whose searching data rate is 56/s. It is simulated that the beam squinting is influenced by the error of real time delay. The relation between the beamforming mode and its modifying volt is discussed.展开更多
提出了一种改进型自适应遗传算法,该算法用logistic函数拟合交叉概率和变异概率,以赌轮盘选择和精英保留相结合的方式,在全局寻找最优解.与经典遗传算法相比,改进型自适应遗传算法可以大大提高算法的求解质量.本文基于改进的自适应遗传...提出了一种改进型自适应遗传算法,该算法用logistic函数拟合交叉概率和变异概率,以赌轮盘选择和精英保留相结合的方式,在全局寻找最优解.与经典遗传算法相比,改进型自适应遗传算法可以大大提高算法的求解质量.本文基于改进的自适应遗传算法研究设计了-3 d B范围为0—12,-10 d B波束宽度为65,波束覆盖为65,天线频带范围为8.5—9.8 GHz,中心频率为9.05 GHz的X波段微带余割平方扩展波束天线阵.研究结果表明改进型自适应遗传算法对方向图的拟合程度具有较大提高,适应度值可以从0.07以下提升到0.09以上.展开更多
文摘有源子阵结构集成度高、电讯功能复杂,是影响有源相控阵天线维修性的重要因素。文中展示了一种高集成模块化X频段天线有源子阵。通过在子阵上设计安装导向装置,提高了有源子阵重复拆装的可靠性。利用分层盲插设计,避免了子阵装配维修过程中的连接器误接错插问题。基于模块化维修设计思路,在子阵内部合理定义现场可更换单元(Line Replaceable Unit, LRU),保障了子阵集成模块的互换性,提高了现场基层维修的效率。以平均修复时间(Mean Time To Repair, MTTR)为指标对有源子阵的维修性进行分析,结果表明该子阵满足X频段相控阵天线快速维修性的设计要求。
基金Natural Science Foundation from Universities in Jiangsu Province(06KJD510034)
文摘The system of a true-time delay line for X-band and 8-unit phased array antennas is introduced. Changing the length of a chirp grating with piezotranslator(PZT), the variable delay is obtained. The scheme is applied to X-band phased array radar whose searching data rate is 56/s. It is simulated that the beam squinting is influenced by the error of real time delay. The relation between the beamforming mode and its modifying volt is discussed.
文摘提出了一种改进型自适应遗传算法,该算法用logistic函数拟合交叉概率和变异概率,以赌轮盘选择和精英保留相结合的方式,在全局寻找最优解.与经典遗传算法相比,改进型自适应遗传算法可以大大提高算法的求解质量.本文基于改进的自适应遗传算法研究设计了-3 d B范围为0—12,-10 d B波束宽度为65,波束覆盖为65,天线频带范围为8.5—9.8 GHz,中心频率为9.05 GHz的X波段微带余割平方扩展波束天线阵.研究结果表明改进型自适应遗传算法对方向图的拟合程度具有较大提高,适应度值可以从0.07以下提升到0.09以上.
