A hybrid method for synthesizing antenna＇s three dimensional （3D） pattern is proposed to obtain the low sidelobe feature of truncated cone conformal phased arrays. In this method, the elements of truncated cone con...A hybrid method for synthesizing antenna＇s three dimensional （3D） pattern is proposed to obtain the low sidelobe feature of truncated cone conformal phased arrays. In this method, the elements of truncated cone conformal phased arrays are projected to the tangent plane in one generatrix of the truncated cone. Then two dimensional （2D） Chebyshev amplitude distribution optimization is respectively used in two mutual vertical directions of the tangent plane. According to the location of the elements, the excitation current amplitude distribution of each element on the conformal structure is derived reversely, then the excitation current amplitude is further optimized by using the genetic algorithm （GA）. A truncated cone problem with 8x8 elements on it, and a 3D pattern desired side lobe level （SLL） up to 35 dB, is studied. By using the hybrid method, the optimal goal is accomplished with acceptable CPU time, which indicates that this hybrid method for the low sidelobe synthesis is feasible.展开更多
箭载中继用户终端对发射天线指向的扫描速率、波束覆盖范围均提出了很高的要求。相控阵天线的快速无惯性扫描能力适合上述应用要求。介绍了一副箭载宽角扫描圆极化相控阵天线的设计方法,设计并加工了一副天线样阵,设计中采用了圆极化微...箭载中继用户终端对发射天线指向的扫描速率、波束覆盖范围均提出了很高的要求。相控阵天线的快速无惯性扫描能力适合上述应用要求。介绍了一副箭载宽角扫描圆极化相控阵天线的设计方法,设计并加工了一副天线样阵,设计中采用了圆极化微带单元、共形阵列结构和顺序旋转排列馈电。测试结果表明：天线可以实现方位±60°、俯仰±45°内的二维电扫描。在上述覆盖空域内,天线增益的变化为13.2~17.2 d Bi,主波束轴比小于5.8 d B,半功率波束宽度为20°~40°。天线的各项指标满足中继发射天线的要求。展开更多
为满足机载系统的需要,给出了共形相控阵天线的分析和设计过程,同时研制了一种高度仅为0.14波长的准八木天线单元。利用三维电磁仿真软件HFSS对天线单元和共形相控阵进行了仿真设计,并研制了一套L频段共形相控阵天线。该天线由天线阵面...为满足机载系统的需要,给出了共形相控阵天线的分析和设计过程,同时研制了一种高度仅为0.14波长的准八木天线单元。利用三维电磁仿真软件HFSS对天线单元和共形相控阵进行了仿真设计,并研制了一套L频段共形相控阵天线。该天线由天线阵面、波束形成网络和波控器等构成。天线阵面由4个天线单元组成,共形安装在机头上。经实际测试,共形相控阵天线阵面的和波束在扫描范围内增益大于10 d Bi,并具有较低的副瓣电平;差波束零深小于-20 d B。展开更多
基金supported by the Fundamental Research Funds for the Central Universities(YWF-13D2-XX-13)the National High-tech Research and Development Program(863 Program)(2008AA121802)
文摘A hybrid method for synthesizing antenna＇s three dimensional （3D） pattern is proposed to obtain the low sidelobe feature of truncated cone conformal phased arrays. In this method, the elements of truncated cone conformal phased arrays are projected to the tangent plane in one generatrix of the truncated cone. Then two dimensional （2D） Chebyshev amplitude distribution optimization is respectively used in two mutual vertical directions of the tangent plane. According to the location of the elements, the excitation current amplitude distribution of each element on the conformal structure is derived reversely, then the excitation current amplitude is further optimized by using the genetic algorithm （GA）. A truncated cone problem with 8x8 elements on it, and a 3D pattern desired side lobe level （SLL） up to 35 dB, is studied. By using the hybrid method, the optimal goal is accomplished with acceptable CPU time, which indicates that this hybrid method for the low sidelobe synthesis is feasible.
文摘箭载中继用户终端对发射天线指向的扫描速率、波束覆盖范围均提出了很高的要求。相控阵天线的快速无惯性扫描能力适合上述应用要求。介绍了一副箭载宽角扫描圆极化相控阵天线的设计方法,设计并加工了一副天线样阵,设计中采用了圆极化微带单元、共形阵列结构和顺序旋转排列馈电。测试结果表明：天线可以实现方位±60°、俯仰±45°内的二维电扫描。在上述覆盖空域内,天线增益的变化为13.2~17.2 d Bi,主波束轴比小于5.8 d B,半功率波束宽度为20°~40°。天线的各项指标满足中继发射天线的要求。
文摘为满足机载系统的需要,给出了共形相控阵天线的分析和设计过程,同时研制了一种高度仅为0.14波长的准八木天线单元。利用三维电磁仿真软件HFSS对天线单元和共形相控阵进行了仿真设计,并研制了一套L频段共形相控阵天线。该天线由天线阵面、波束形成网络和波控器等构成。天线阵面由4个天线单元组成,共形安装在机头上。经实际测试,共形相控阵天线阵面的和波束在扫描范围内增益大于10 d Bi,并具有较低的副瓣电平;差波束零深小于-20 d B。
