摘要
文章针对张拉天线存在垂跨比这一现象,分析了垂跨比对天线力学和电磁特性的影响。首先对张拉天线进行力学分析,获得索网平衡状态下索段的拉力值;采用扩展的物理光学法分析丝网反射面的电磁特性,得到天线的远场电性能;经过数值仿真分析,得到天线力学与电磁特性随垂跨比的变化曲线。结果显示随着垂跨比的增加,张拉天线的力学性能得到提高,电磁性能下降。
The effects of sag-to-span ratio on mechanical and electromagnetic performances of tensegrity reflectors are investigated in this paper. The cable tension distribution is obtained by solving self-equilibrium equations of the cable net. The electromagnetic performances are calculated by using the extended physical optics method with consideration of wire mesh leakage, and the effects of sag-to-span ratio on far field pattern are discussed by a simulation study. The relations of the mechanical and electromagnetic performances to sag-to-span ratio are demonstrated pictorially. The results show that the sag-to-span ratio can improve the mechanical performance but deteriorate the radiation characteristics.
出处
《空间电子技术》
2014年第2期36-41,46,共7页
Space Electronic Technology
关键词
张拉天线
垂跨比
力学性能
电性能
Tensegrity reflectors
Sag-to-span ratio
Mechanical performance
Electromagnetic performance
