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载荷使卡塞格伦天线结构的每个部分发生变形。我们将系统从原设计位置变换到一个新位置,使得变形卡焦系统的组合馈源相对此新系统的组合馈源的移动和转动为零,此新系统称之为零馈移系统。计算变形卡焦系统相对新系统的辐射方向图,通过与原设计系统的方向图的比较,能够得到电性能明确的变化量,而这对于天线的结构设计是十分有用的。
The load distorts each part of the Cassegrain antenna structure. We change the system from the original design position to a new position so that the combined feed of the deformed card-caving system is zero relative to the combined feed of the new system. This new system is called a zero-feed system. Comparing the radiation pattern of the new system of the deformed CAC system with that of the original design system, the definite variation of the electrical properties can be obtained, which is very useful for the structural design of the antenna.