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发明授权
CN1525599B 用于卡塞格伦型SHF天线的副反射器 失效 - 权利终止

用于卡塞格伦型SHF天线的副反射器
摘要：
本发明涉及用于卡塞格伦型SHF天线的副反射器。本发明向天线的基本副反射器(103)提供了朝向主反射器的呈圆柱状的第一圆环(104)，以及固定在所述圆柱端部的圆冠状第二环(105)，第二环从该圆柱处向外突出。这些环由导电材料制成，圆柱长度和圆冠的宽度处于平均波长四分之一的数量级，该天线的尺寸适于该平均波长。本发明使得副反射器的“漏失辐射”显著减少，从而在同等性能下允许天线的尺寸显著减小。
摘要（英）：

The invention concerns the secondary reflectors of SHF antennae of the Cassegrain type. It consists of providing the secondary basic reflector (103) of this antenna with a first circular ring (104) in the shape of a cylinder directed toward the main reflector, and a second ring (105) in the shape of a circular crown fixed to the end of the cylinder, and projecting outward from the latter. These rings are made from a conducting material. The length of the cylinder and the width of the crown are of the range of one quarter of the average wavelength for which the antenna is dimensioned. This enables the 'overspill radiation' of the secondary reflector to be reduced considerably, and therefore allows the dimensions of the antenna to be reduced significantly for equivalent performance.

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