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1. 发明授权

US06266024B1 Rotatable and scannable reconfigurable shaped reflector with a movable feed system 有权
标题翻译：具有可移动进给系统的可旋转和可扫描的可重构形状的反射器
公开(公告)号：US06266024B1
公开(公告)日：2001-07-24
申请号：US09222420
申请日：1998-12-23
申请人： Parthasarathy Ramanujam , Brian M. Park , Louis R. Fermelia , Vincent E. Cascia
发明人： Parthasarathy Ramanujam , Brian M. Park , Louis R. Fermelia , Vincent E. Cascia
IPC分类号： H01Q1300
CPC分类号： H01Q3/16 , H01Q1/288 , H01Q3/12 , H01Q3/18 , H01Q3/20 , H01Q19/192
摘要： An antenna system having a rotatable and scannable reconfigurable shaped reflector with a movable feed system. The antenna system allows beam shapes to be rotated about an optimum axis and defocused while a spacecraft is in orbit in order to change a particular coverage pattern for the spacecraft.
摘要翻译：一种具有可旋转和可扫描的可重构形状的反射器的天线系统，其具有可移动进给系统。天线系统允许波束形状围绕最佳轴线旋转，并且在航天器进入轨道时散焦，以便改变航天器的特定覆盖模式。

2. 发明授权

US08552917B2 Wide angle multibeams 有权
标题翻译：广角多波束
公开(公告)号：US08552917B2
公开(公告)日：2013-10-08
申请号：US12769418
申请日：2010-04-28
申请人： Daniel F. Mathews , Parthasarathy Ramanujam , Robert B. Mathews , Thomas M. Hikido , Louis R. Fermelia , Gary J. Gawlas
发明人： Daniel F. Mathews , Parthasarathy Ramanujam , Robert B. Mathews , Thomas M. Hikido , Louis R. Fermelia , Gary J. Gawlas
IPC分类号： H01Q13/00
CPC分类号： H01Q1/288 , H01Q19/17 , H01Q25/007 , H04B7/18515
摘要： A method and system are disclosed for wide angle multibeam antennas. The method and system involve a multibeam antenna system for generating high performance multiple spot beams. In one or more embodiments, the multibeam antenna system includes an oversized antenna reflector and a plurality of antenna feeds. The oversized antenna reflector has its surface shape optimized from a normal parabolic shape in order to broaden and shape the reflected spot beams to improve antenna performance. In addition, the diameter of the oversized antenna reflector is greater than ((100*λ)/δ), where λ is the wavelength in inches and δ is the beam to beam spacing in degrees. In some embodiments, the ratio of the focal length of the oversized antenna reflector to the diameter of the oversized antenna reflector (F/D) is greater than 0.7. In at least one embodiment, the system further includes an antenna sub-reflector.
摘要翻译：公开了广角多波束天线的方法和系统。该方法和系统涉及用于产生高性能多点波束的多波束天线系统。在一个或多个实施例中，多波束天线系统包括过大的天线反射器和多个天线馈电。超大型天线反射器具有从正常抛物线形状优化的表面形状，以便扩大和形成反射的光束以改善天线性能。此外，尺寸过大的天线反射器的直径大于（（100 *λ）/ delta），其中λ是以英寸为单位的波长，delta是以束为单位的波束间距。在一些实施例中，尺寸过大的天线反射器的焦距与超尺寸天线反射器的直径（F / D）的比率大于0.7。在至少一个实施例中，系统还包括天线子反射器。

3. 发明授权

US6150990A Method for reducing cross-polar degradation in multi-feed dual offset reflector antennas 失效
标题翻译：减少多馈双重偏移反射天线的极化降解的方法
公开(公告)号：US6150990A
公开(公告)日：2000-11-21
申请号：US119301
申请日：1998-07-20
申请人： Parthasarathy Ramanujam , Philip H. Law , Louis R. Fermelia
发明人： Parthasarathy Ramanujam , Philip H. Law , Louis R. Fermelia
IPC分类号： H01Q3/24 , H01Q19/02 , H01Q19/17 , H01Q19/19 , H01Q25/04 , H01Q1/28
CPC分类号： H01Q19/192 , H01Q19/028 , H01Q19/17 , H01Q3/245
摘要： A unique feed structure for improving the cross-polarization performance of a reflector antenna system is disclosed. According to the present invention, the feed structure is an array including a number of feeds, which are rotated in a predetermined fashion to yield superior cross polarization performance of the antenna system. The array feed in the center of the feed structure is positioned approximately in the focus of the antenna reflector. The array feeds located on the y-axis are slightly rotated in either a clockwise or a counter-clockwise manner. The magnitude of the rotation is proportional to the distance of the feeds from the x-axis along the y-axis. The rotation of the feeds yields significant performance in cross polarization performance, while having little or no co-polarization effect.
摘要翻译：公开了一种用于改善反射器天线系统的交叉极化性能的独特馈电结构。根据本发明，进料结构是包括多个进料的阵列，其以预定的方式旋转以产生天线系统的优异的交叉极化性能。进料结构中心的阵列进给位置大致位于天线反射器的焦点。位于y轴上的阵列进给顺时针或逆时针方向稍微旋转。旋转的幅度与X轴沿着y轴的进给距离成比例。馈送的旋转在交叉极化性能方面产生显着的性能，同时具有很少的或没有共极化效应。

4. 发明申请

US20110267251A1 WIDE ANGLE MULTIBEAMS 有权
标题翻译：宽角多边形
公开(公告)号：US20110267251A1
公开(公告)日：2011-11-03
申请号：US12769418
申请日：2010-04-28
申请人： Daniel F. Mathews , Parthasarathy Ramanujam , Robert B. Mathews , Thomas M. Hikido , Louis R. Fermelia , Gary J. Gawlas
发明人： Daniel F. Mathews , Parthasarathy Ramanujam , Robert B. Mathews , Thomas M. Hikido , Louis R. Fermelia , Gary J. Gawlas
IPC分类号： H01Q15/14 , H01Q21/00 , H01Q9/16 , H01Q13/02
CPC分类号： H01Q1/288 , H01Q19/17 , H01Q25/007 , H04B7/18515
摘要： A method and system are disclosed for wide angle multibeam antennas. The method and system involve a multibeam antenna system for generating high performance multiple spot beams. In one or more embodiments, the multibeam antenna system includes an oversized antenna reflector and a plurality of antenna feeds. The oversized antenna reflector has its surface shape optimized from a normal parabolic shape in order to broaden and shape the reflected spot beams to improve antenna performance. In addition, the diameter of the oversized antenna reflector is greater than ((100*λ)/δ), where λ is the wavelength in inches and δ is the beam to beam spacing in degrees. In some embodiments, the ratio of the focal length of the oversized antenna reflector to the diameter of the oversized antenna reflector (F/D) is greater than 0.7. In at least one embodiment, the system further includes an antenna sub-reflector.
摘要翻译：公开了广角多波束天线的方法和系统。该方法和系统涉及用于产生高性能多点波束的多波束天线系统。在一个或多个实施例中，多波束天线系统包括过大的天线反射器和多个天线馈电。超大型天线反射器具有从正常抛物线形状优化的表面形状，以便扩大和形成反射的光束以改善天线性能。此外，尺寸过大的天线反射器的直径大于（（100 *λ）/δ），其中λ是以英寸为单位的波长，δ是以束为单位的光束间距。在一些实施例中，尺寸过大的天线反射器的焦距与超尺寸天线反射器的直径（F / D）的比率大于0.7。在至少一个实施例中，系统还包括天线子反射器。

5. 发明授权

US6031502A On-orbit reconfigurability of a shaped reflector with feed/reflector defocusing and reflector gimballing 失效
标题翻译：具有进料/反射器散焦和反射器球形的成形反射器的在轨可重构性
公开(公告)号：US6031502A
公开(公告)日：2000-02-29
申请号：US753660
申请日：1996-11-27
申请人： Parthasarathy Ramanujam , Louis R. Fermelia , Cynthia A. Dixon , Miguel A. Estevez
发明人： Parthasarathy Ramanujam , Louis R. Fermelia , Cynthia A. Dixon , Miguel A. Estevez
IPC分类号： H01Q19/18 , H01Q1/18 , H01Q1/28 , H01Q3/16 , H01Q3/18 , H01Q3/20 , H01Q15/14 , H01Q3/12 , H01Q19/10
CPC分类号： H01Q3/18 , H01Q1/18 , H01Q1/288 , H01Q15/141 , H01Q3/16 , H01Q3/20
摘要： A system and method for changing the radiation pattern of an antenna assembly of a satellite in orbit is provided. The antenna assembly includes a reflector antenna fed by a feed assembly. The reflector antenna transmits and receives signals within a radiation pattern. The reflector antenna and the feed assembly are movably mounted to a sliding mechanism so that they can be displaced with respect to one another. The displacement causes defocusing as the reflector antenna is displaced from the focus point. The defocusing causes the radiation pattern to become more compact or broadened. Thus, the radiation pattern of the satellite provided with a single reflector antenna and a single feed element may be changed while the satellite is in orbit. The system and method include gimballing the reflector antenna to steer the radiation pattern.
摘要翻译：提供了一种用于改变卫星在轨道中的天线组件的辐射模式的系统和方法。天线组件包括由馈送组件馈送的反射器天线。反射器天线在辐射图中发射和接收信号。反射器天线和馈送组件可移动地安装到滑动机构，使得它们可以相对于彼此移位。当反射器天线从聚焦点移位时，位移引起散焦。散焦导致辐射图变得更加紧凑或变宽。因此，当卫星进入轨道时，可以改变设置有单个反射器天线和单个馈送元件的卫星的辐射图。该系统和方法包括将反射器天线槌球以控制辐射图。

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