Improved small aperture deformed cassegrain antenna

一种改进的小孔径变形卡塞格伦天线

Abstract

本实用新型是关于对信号接收/发射用卡塞格伦天线的改进,尤其涉及一种高效率小孔径单修变卡塞格伦天线,其特征是天线双曲副面边缘为圆弧面旋转段,将副面变形为前双曲面后圆弧面的旋转组合体,使小孔径天线口径上的相位和幅度分布接近或达到理想程度,聚焦性能得到进一步完善。馈源喇叭内锥面修改为槽深逐渐加深、槽宽逐渐变窄、各齿尖在同一斜线上的渐变竖齿结构,更是提高了整个天线系统的电气性能,按实用新型结构制作的主面口径0.8m的天线,其效率高达78.9%,达到高效率,高增益。副面直接滑动固定在馈源上,不仅有效减少了支撑系统的阴影面积,而且可使副面由三维调整变为一维轴向调整,还降低了天线系统的重量。
The utility model relates to an improvement of the signal receiving/radiation Cassegrain antenna, in particular to a high-efficiency small bore diameter univariate Cassegrain antenna, characterized in that the edge of a hyperbolic sub-reflector of the antenna is a circular arc surface rotating section, the sub-reflector is deformed into a rotating assembly whose front side is a hyperboloid and back side is a circular arc surface, the distribution of the phase and the amplitude on the caliber of the small bore diameter antenna is close to or reach the ideal degree, and the focusing capability is further improved. An inner tapered surface of a feed horn is modified into a gradually changeable vertical tooth structure whose trough depth is gradually deepened, trough width is gradually narrower and all tooth tips are on the same oblique line, thus enhancing the electrical capability of the whole antenna system even more; the efficiency of the antenna which is made according to the structure of the utility model and has a 0.8m caliber of a main surface highly reaches 78.9% and achieves high efficiency and high gain; and the sub-reflector is directly slid to fix on the feed, thereby not only effectively reducing the shaded area of the supporting system but also making the sub-reflector to be changed from the three-dimensional regulation to the one-dimensional axial regulation, and also reducing the weight of the antenna system.

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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    CN-101071903-BNovember 09, 2011环旭电子股份有限公司超宽频平面天线
    CN-101841082-ASeptember 22, 2010广东通宇通讯设备有限公司Feed source for microwave antenna and microwave antenna
    CN-102013576-AApril 13, 2011西安电子科技大学修正型卡塞格伦式天线的副面调整方法
    CN-102013576-BJune 12, 2013西安电子科技大学Regulating method of secondary surface of modified Cassegrain type antenna