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提出了一种构架单元式的展开桁架天线,对构架式可展天线的电性能进行了研究,以确定较优的设计参数和结构方案,针对可展反射面形态的具体特点,基于几何光学原理,推导了可展天线远场的电场强度公式,将口径面划分成矩形网格,用数值方法对远场场强进行积分,得到天线反射面的方向图.进而编制相应程序,用于分析不同设计参数的构架式天线反射面的电性能.该方法直接将结构变形与天线电性能相联系,避免了通过均方根换算带来的额外误差,使得设计更准确.此方法同样适用于标准抛物面或者任何已知缺陷反射面的辐射场计算.
A kind of truss-type truss antenna is proposed to study the electrical properties of the framed extendible antenna to determine the optimal design parameters and structure scheme. According to the specific features of the shape of the developable reflector, based on the principle of geometrical optics , The electric field strength formula of the far field of a developable antenna is deduced, the aperture surface is divided into rectangular grids, and the far field strength is integrated by numerical method to obtain the directional pattern of the antenna reflecting surface. Then the corresponding program is compiled for analyzing different Design parameters of the antenna structure of the antenna’s electrical properties.This method directly to the structural deformation and electrical properties of the antenna is linked to avoid the additional error caused by the rms conversion to make the design more accurate.This method is also applicable to the standard parabolic Or the radiation field of any known defect reflective surface.