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1. 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。

2. 发明授权

US06628238B2 Sub-reflector for dual-reflector antenna system 有权
标题翻译：双反射天线系统的子反射器
公开(公告)号：US06628238B2
公开(公告)日：2003-09-30
申请号：US09992259
申请日：2001-11-19
申请人： Parthasarathy Ramanujam , Albert E. Lyerly , Brian M. Park , Hussain Haddad , Laurston C. Wah
发明人： Parthasarathy Ramanujam , Albert E. Lyerly , Brian M. Park , Hussain Haddad , Laurston C. Wah
IPC分类号： H01Q1919
CPC分类号： H01Q1/288 , H01Q15/16 , H01Q19/192
摘要： An antenna includes a feed generating a communication signal. A sub-reflector is positioned to reflect the communication's signal to form a sub-reflective signal. A main reflector is positioned to reflect the sub-reflective signal. The sub-reflector has an elliptical rim.
摘要翻译：天线包括产生通信信号的馈电。子反射器被定位成反射通信的信号以形成子反射信号。主反射器被定位成反射副反射信号。子反射器具有椭圆形边缘。

3. 发明授权

US06366256B1 Multi-beam reflector antenna system with a simple beamforming network 有权
标题翻译：具有简单波束成形网络的多波束反射器天线系统
公开(公告)号：US06366256B1
公开(公告)日：2002-04-02
申请号：US09665720
申请日：2000-09-20
申请人： Parthasarathy Ramanujam , Philip H. Law , Steven O. Lane
发明人： Parthasarathy Ramanujam , Philip H. Law , Steven O. Lane
IPC分类号： H01Q1914
CPC分类号： H01Q3/2658 , H01Q1/288 , H01Q19/192 , H01Q25/007 , H04B7/18515
摘要： An antenna system and method for generating a desired contiguous spot beam pattern, and a signal is disclosed. The contiguous spot beam generating antenna system comprises a reflector system configured in a side-fed Cassegrain (SFOC) configuration, an array of feed horns comprising at least a subset of feed horns for illuminating the reflector system, and a beamforming network, communicatively coupled to the array of feed horns, for controlling an excitation of the subset of the feed horns in the array of feed horns. The method comprises illuminating a side fed offset Cassegrain reflector system with an RF signal emanating from an array of feed horns, and controlling an excitation of the subset of the feed horns. The present invention provides a beamformer network that can produce uniform performance over wide scan angles, is easier to integrate and test, that can change the beam pattern on orbit, and that provides a more complete utilization of space assets without dramatically increasing the cost of manufacturing and operating a satellite. The use of a SFOC configuration or other wide scanning antenna permits the use of a simple beamforming network while maintaining excellent beam beam scanning characteristics.
摘要翻译：公开了一种用于产生期望的连续点波束图案的天线系统和方法，以及信号。连续点波束产生天线系统包括以侧馈卡塞格林（SFOC）配置配置的反射器系统，包括用于照射反射器系统的馈电喇叭的至少一个子集的馈电喇叭阵列，以及波束形成网络，通信地耦合到用于控制馈电喇叭阵列中馈电喇叭子集的激励的馈源喇叭阵列。该方法包括用从馈源喇叭阵列发出的RF信号照亮侧馈偏移卡塞格林反射器系统，以及控制馈电喇叭子集的激发。本发明提供了一种波束形成器网络，其可以在宽扫描角度上产生均匀的性能，更容易集成和测试，这可以改变轨道上的波束图案，并且在不显着增加制造成本的情况下提供更完整的利用空间资产并运行卫星。使用SFOC配置或其他宽扫描天线允许使用简单的波束成形网络，同时保持优异的波束扫描特性。

4. 发明授权

US6052095A Dual gridded reflector antenna 有权
标题翻译：双网格反射天线
公开(公告)号：US6052095A
公开(公告)日：2000-04-18
申请号：US267097
申请日：1999-03-10
申请人： Parthasarathy Ramanujam , Philip H. Law , Nancy Garcia , Daniel A. White
发明人： Parthasarathy Ramanujam , Philip H. Law , Nancy Garcia , Daniel A. White
IPC分类号： H01Q1/28 , H01Q15/14 , H01Q15/22 , H01Q19/13 , H01Q21/28 , H01Q25/00 , H01Q19/14
CPC分类号： H01Q21/28 , H01Q1/288 , H01Q15/147 , H01Q15/22 , H01Q19/132 , H01Q25/001 , Y10S343/02
摘要： An improved dual gridded reflector antenna configuration which allows cross-polarization radiation to be scanned in any given direction. The dual-gridded reflector assembly includes a front parabolic reflector illuminated by a first source, and a second parabolic reflector illuminated by a second source. The second reflector is positioned adjacent to and behind the front reflector such that the center points of the reflectors align to define a center axis. Additionally, the first and second sources are positioned at different offsets with respect to the reflectors and have a respective rotated offset angle with respect to the center axis such that the sources define an antenna feed separation. By modifying the offsets and the rotated offset angles, the feed separation can be designed to have an inclination with respect to the north-south or east-west feed separation direction.
摘要翻译：改进的双网格反射器天线配置，允许在任何给定方向上扫描交叉极化辐射。双网格反射器组件包括由第一源照射的前抛物面反射器和由第二源照射的第二抛物面反射器。第二反射器定位成与前反射器相邻并在其后面，使得反射器的中心点对准以限定中心轴线。此外，第一和第二源相对于反射器定位在不同的偏移处，并且相对于中心轴线具有相应的旋转偏移角，使得源限定天线馈送间隔。通过改变偏移量和旋转的偏移角度，进给分离可以被设计成相对于南北或东西方的进给分离方向具有倾斜度。

5. 发明授权

US08103270B2 Fixed cell communication system with reduced interference 有权
标题翻译：固定小区通信系统减少干扰
公开(公告)号：US08103270B2
公开(公告)日：2012-01-24
申请号：US12046271
申请日：2008-03-11
申请人： Harold Rosen , Ying Feria , Parthasarathy Ramanujam
发明人： Harold Rosen , Ying Feria , Parthasarathy Ramanujam
IPC分类号： H04W4/00
CPC分类号： H04B7/2041 , H04B7/18528
摘要： A communication system has a high altitude communication device that has an antenna for directing beams to a fixed cell pattern with a polarity of cells. A specific pattern of cells having the same communication resource is provided. Cells having the same resource may be separated. The antenna is shaped to suppress interference with locations having the same resource. The areas not having the same resource are not suppressed to allow the system to have maximum capacity and allow a smaller antenna aperture.
摘要翻译：通信系统具有高空通信装置，其具有用于将波束引导到具有小区极性的固定小区模式的天线。提供具有相同通信资源的小区的特定模式。可以分离具有相同资源的单元。天线成形为抑制对具有相同资源的位置的干扰。不具有相同资源的区域不被抑制以允许系统具有最大容量并允许较小的天线孔径。

6. 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。

7. 发明授权

US06795034B2 Gregorian antenna system for shaped beam and multiple frequency use 失效
标题翻译：格里高利天线系统用于成型梁和多频使用
公开(公告)号：US06795034B2
公开(公告)日：2004-09-21
申请号：US10192364
申请日：2002-07-10
申请人： Albert E. Lyerly , Parthasarathy Ramanujam
发明人： Albert E. Lyerly , Parthasarathy Ramanujam
IPC分类号： H01Q1300
CPC分类号： H01Q19/17 , H01Q19/19
摘要： A method and system for shaped beam and multiple frequency use having a shaped main reflector, two feeds having separate and distinct frequency bands, a first shaped sub-reflector having a frequency selective surface and a second shaped sub-reflector. The first shaped sub-reflector has the electrical property of reflecting one frequency band and passing another. A second desired frequency band from the second feed passes through the tuned FSS surface of the first sub-reflector and reflects off the second sub-reflector towards the main reflector.
摘要翻译：一种用于成形梁和多次频率使用的方法和系统，其具有成形主反射器，两个馈送具有分离且不同的频带，具有频率选择表面的第一成形子反射器和第二成形子反射器。第一形状的副反射器具有反射一个频带并通过另一个频带的电气特性。来自第二进给的第二期望频带通过第一子反射器的调谐FSS表面，并将第二子反射器反射向主反射器。

8. 发明授权

US06781555B2 Multi-beam antenna communication system and method 有权
标题翻译：多波束天线通信系统及方法
公开(公告)号：US06781555B2
公开(公告)日：2004-08-24
申请号：US10093117
申请日：2002-03-05
申请人： Parthasarathy Ramanujam , Harold A. Rosen , Mark T. Austin , William D. Beightol
发明人： Parthasarathy Ramanujam , Harold A. Rosen , Mark T. Austin , William D. Beightol
IPC分类号： H01Q1300
CPC分类号： H01Q1/288 , H01Q19/13 , H01Q21/20 , H01Q25/00 , Y10S343/02
摘要： A communication system and method for reconfigurably transmitting and receiving signals via a multi-beam reflector antenna array are disclosed. The multi-beam antenna system comprises a plurality of rings of single beam reflectors, each reflector having its own feed, wherein the plurality of rings are substantially concentric or nested and disposed on separate planes such that the reflectors of adjacent rings are substantially interleaved. The method, in one embodiment, comprises generating beams from a first, second and third ring of single beam feeds, respectively reflecting each beam from the first, second and third ring of single beam feeds on a separate reflector to a substantially separate coverage area, wherein the first, second and third rings are substantially concentric and disposed on separate planes such that the reflectors of adjacent rings are substantially interleaved.
摘要翻译：公开了一种用于通过多光束反射器天线阵列重新发送和接收信号的通信系统和方法。多光束天线系统包括多个单个光束反射器的环，每个反射器具有其自己的馈送，其中多个环基本上是同心的或嵌套的并且设置在分开的平面上，使得相邻环的反射器基本上交错。在一个实施例中，该方法包括从单个波束馈送的第一，第二和第三环产生波束，分别将来自第一，第二和第三环单波馈源的每个波束分别反射到单独的反射器上至基本上分开的覆盖区域，其中所述第一，第二和第三环基本上同心并且设置在分开的平面上，使得相邻环的反射器基本上交错。

9. 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。

10. 发明授权

US5936588A Reconfigurable multiple beam satellite phased array antenna 失效
标题翻译：可重构多波束卫星相控阵天线
公开(公告)号：US5936588A
公开(公告)日：1999-08-10
申请号：US092511
申请日：1998-06-05
申请人： Sudhakar K. Rao , Parthasarathy Ramanujam , Robert E. Vaughan , Philip H. Law
发明人： Sudhakar K. Rao , Parthasarathy Ramanujam , Robert E. Vaughan , Philip H. Law
IPC分类号： H01Q3/24 , H01Q21/06 , H01Q25/00 , H04B7/185 , H04B7/204
CPC分类号： H04B7/18519 , H01Q21/064 , H01Q25/008 , H01Q3/24 , H04B7/2041
摘要： A reconfigurable multiple beam phased array antenna has radiating elements arranged in a planar array and variable phase shifters. Each one of the phase shifters is connected to a respective one of the radiating elements. The array antenna further includes a beam forming network for forming spot and regional beam signals. The beam forming network forms a regional beam signal from a combination of spot beam signals. The beam forming network has two dimensional stacks of Rotman lenses provided with a first set of ports. Each one of the first set of ports is connected to a respective one of the radiating elements with. The Rotman lenses generate frequency invariant spot beam signals which are communicated between the radiating elements and the Rotman lenses via the first set of ports for transmission and reception of spot beams and regional beams by the radiating elements. The phase shifters are adjusted to steer the spot and regional beams to desired locations.
摘要翻译：可重构多光束相控阵天线具有布置在平面阵列中的辐射元件和可变移相器。每个移相器连接到相应的一个辐射元件。阵列天线还包括用于形成点和区域波束信号的波束形成网络。波束形成网络从点波束信号的组合形成区域波束信号。波束形成网络具有设置有第一组端口的Rotman透镜的二维叠层。第一组端口中的每一个都与相应的辐射元件连接。 Rotman透镜产生频率不变点波束信号，其通过第一组端口在辐射元件和Rotman透镜之间传递，用于通过辐射元件发射和接收点波束和区域波束。调整移相器以将斑点和区域光束转向所需位置。

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