公开(公告)号：US4482898A

公开(公告)日：1984-11-13

申请号：US433986

申请日：1982-10-12

申请人： Corrado Dragone ,  Ralph A. Semplak

发明人： Corrado Dragone ,  Ralph A. Semplak

IPC分类号： H01Q19/13 ,  H01Q19/19 ,  H01Q19/20

CPC分类号： H01Q19/191 ,  H01Q19/132 ,  H01Q19/20

摘要： The present invention relates to an antenna feed arrangement for correcting for astigmatism caused by an offset main reflector. The feed arrangement comprises at least one feed element, a first and a second cylindrical reflector disposed along the feed axis of the antenna with corresponding axes across the reflecting surfaces thereof oriented orthogonal to each other, and a pair of plates comprising a conductive material which are disposed parallel to, and on either side of, the feed axis of the antenna to enclose the area between the at least one feed element and the first reflector while forming an aperture thereof within a predetermined distance from the second reflector. The feed arrangement components are oriented with respect to each other and the aperture of the antenna to provide separate phase centers with a predetermined spacing therebetween on the feed axis for the two principal planes of curvature of a wavefront illuminating the antenna aperture to correct for astigmatism, which predetermined spacing can be selectively changed.

摘要翻译： 本发明涉及一种用于校正由偏移主反射器引起的象散的天线馈送装置。 馈送装置包括至少一个进给元件，沿着天线的进给轴布置的第一和第二圆柱形反射器，其对应的轴线跨越彼此正交的反射表面，以及一对板，其包括导电材料， 平行于所述天线的进给轴平行并且在其两侧布置，以包围所述至少一个进给元件和所述第一反射器之间的区域，同时在距所述第二反射器预定距离内形成孔。 馈电布置部件相对于彼此和天线的孔定向，以在馈送轴线上提供具有预定间隔的单独相位中心，用于照射天线孔径的波前的两个主曲率平面以校正散光， 可以选择性地改变预定间隔。

公开(公告)号：US4231043A

公开(公告)日：1980-10-28

申请号：US68731

申请日：1979-08-22

申请人： Ralph A. Semplak

发明人： Ralph A. Semplak

IPC分类号： H01Q17/00 ,  H01Q19/13 ,  H01Q13/02

CPC分类号： H01Q19/132 ,  H01Q17/001

摘要： The present invention relates to technique for reducing near-in sidelobes of an offset antenna. The method comprises positioning at least one piece of microwave absorbing material on a sector of the edge of the reflecting surface of the offset main reflector closest to the focal point of the antenna. The material is positioned on the portion of the edge of the reflecting surface nearest the focal point of the main reflector in such a manner as to achieve substantial selective reduction of the near-in sidelobes generated by the antenna.

摘要翻译： 本发明涉及用于减少偏移天线的近旁瓣的技术。 该方法包括将至少一片微波吸收材料定位在最靠近天线焦点的偏移主反射体的反射表面的边缘的扇形区上。 该材料位于最靠近主反射体的焦点的反射表面的边缘部分上，以便实现由天线产生的接近旁瓣的实质性选择性的降低。

公开(公告)号：US4282530A

公开(公告)日：1981-08-04

申请号：US106466

申请日：1979-12-26

申请人： Ralph A. Semplak

发明人： Ralph A. Semplak

IPC分类号： H01Q1/42 ,  H01Q17/00 ,  H01Q19/13 ,  H01Q13/00

CPC分类号： H01Q1/42 ,  H01Q17/001 ,  H01Q19/132

摘要： The present invention relates to a method for reducing the weather cover-induced reflection sidelobes associated with horn reflector antenna arrangements. More particularly, the present invention consists of attaching the weather cover (26) to curved forms (21,23) placed in the antenna aperture, where the forms are shaped to contour the weather cover into a cylindrical paraboloid form, this form being capable of focusing the reflections from the weather cover onto a line inside the antenna arrangement. By covering this line inside the antenna with microwave absorbing material, (36) the focused weather cover reflections may be absorbed, thereby significantly reducing the sidelobes caused by the presence of the weather cover.

摘要翻译： 本发明涉及一种降低与喇叭反射器天线装置相关联的天气覆盖物反射旁瓣的方法。 更具体地，本发明包括将天气罩（26）附接到放置在天线孔中的弯曲形式（21,23），其中形状被成形为将天气覆盖物轮廓化为圆柱形抛物面形式，该形式能够 将天气覆盖物的反射集中在天线装置内的一条线上。 通过用微波吸收材料覆盖天线内的这条线，（36）可以吸收聚焦的天气覆盖物反射，从而显着减少由天气覆盖物的存在引起的旁瓣。