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1. 发明授权

US06366257B1 Integrated dual beam reflector antenna 有权
标题翻译：集成双光束反射天线
公开(公告)号：US06366257B1
公开(公告)日：2002-04-02
申请号：US09713114
申请日：2000-11-15
申请人： Parthasarathy Ramanujam , Michael E. Pekar , David M. Kershner , Brian M. Park , Donald L. Davis
发明人： Parthasarathy Ramanujam , Michael E. Pekar , David M. Kershner , Brian M. Park , Donald L. Davis
IPC分类号： H01Q1300
CPC分类号： H01Q1/288 , H01Q25/007
摘要： The present invention discloses a method for generating multiple antenna beams and a system for generating multiple antenna beams. The system comprises a first reflector surface that has a primary and at least a first auxiliary surface, and a second reflector surface, and also comprises first, second, and third feed horns. The first feed horn illuminates the primary surface with radio frequency (RF) energy, the second feed horn illuminates the auxiliary surface with RF energy, and the third feed horn illuminates the second reflector surface with RF energy. The first feed horn and third feed horn are removed from an axis of symmetry of the first auxiliary surface. The method comprises illuminating a primary portion of a first reflector surface with radio frequency (RF) energy from a first feed horn, illuminating an auxiliary portion of the first reflector surface with RF energy from a second feed horn, illuminating a second reflector surface with RF energy from a third feed horn, wherein the first feed horn and third feed horn are removed from an axis of symmetry of the auxiliary portion of the first reflector surface.
摘要翻译：本发明公开了一种用于产生多个天线波束的方法和一种用于产生多个天线波束的系统。该系统包括具有初级和至少第一辅助表面的第一反射器表面和第二反射器表面，并且还包括第一，第二和第三馈电喇叭。第一馈电喇叭用射频（RF）能量照射主表面，第二馈电喇叭用RF能量照射辅助表面，第三馈电喇叭用RF能量照射第二反射器表面。从第一辅助表面的对称轴去除第一馈电喇叭和第三馈电喇叭。该方法包括用来自第一馈电喇叭的射频（RF）能量照射第一反射器表面的主要部分，用来自第二馈电喇叭的RF能量照射第一反射器表面的辅助部分，用RF照射第二反射器表面来自第三馈电喇叭的能量，其中第一馈电喇叭和第三馈电喇叭从第一反射器表面的辅助部分的对称轴线移除。

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

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。

4. 发明授权

US06225964B1 Dual gridded reflector antenna system 有权
标题翻译：双网格反射天线系统
公开(公告)号：US06225964B1
公开(公告)日：2001-05-01
申请号：US09328769
申请日：1999-06-09
申请人： Louis Rudolph Fermelia , Parthasarathy Ramanujam , Brian M. Park
发明人： Louis Rudolph Fermelia , Parthasarathy Ramanujam , Brian M. Park
IPC分类号： H01Q1502
CPC分类号： H01Q15/22 , H01Q19/195
摘要： An antenna system comprising a first reflector and a second reflector is disclosed. The first reflector reflects an incident signal from a signal source. The incident signal comprises a first signal having a first polarization and a second signal having a second polarization. The first reflector has a surface that reflects the first signal and the second signal. The second reflector receives the reflected incident signal from the first reflector and comprises a first reflective surface for reflecting the first signal and a second reflective surface for reflecting the second signal.
摘要翻译：公开了一种包括第一反射器和第二反射器的天线系统。第一反射器反射来自信号源的入射信号。入射信号包括具有第一偏振的第一信号和具有第二偏振的第二信号。第一反射器具有反映第一信号和第二信号的表面。第二反射器接收来自第一反射器的反射入射信号，并且包括用于反射第一信号的第一反射表面和用于反射第二信号的第二反射表面。

5. 发明授权

US06621461B1 Gridded reflector antenna 有权
标题翻译：格栅反射天线
公开(公告)号：US06621461B1
公开(公告)日：2003-09-16
申请号：US09636085
申请日：2000-08-09
申请人： Parthasarathy Ramanujam , Brian M. Park , Paul E. Guillaume , Cameron Massey
发明人： Parthasarathy Ramanujam , Brian M. Park , Paul E. Guillaume , Cameron Massey
IPC分类号： H01Q1914
CPC分类号： H01Q19/195 , H01Q1/288 , H01Q15/147 , H01Q15/22
摘要： A method for broadcasting, a signal, and an antenna system are disclosed. The antenna system comprises a feed horn and a reflector. The feed horn provides a radio frequency (RF) signal. The reflector is aligned with the feed horn and is illuminated by the feed horn, and comprises a reflective grid. The reflective grid lines are substantially parallel as viewed from a geographic location of a desired output beam from the antenna system. A method in accordance with the present invention comprises illuminating a reflector with an RF signal emanating from a feed horn, the feed horn being substantially located at a focal point of the reflector, wherein the reflector comprises a reflective grid, and reflecting the RF signal with the reflective grid, wherein lines of the reflective grid are substantially parallel as viewed from a geographic location of a desired output beam from the antenna system.
摘要翻译：公开了一种用于广播，信号和天线系统的方法。天线系统包括馈电喇叭和反射器。馈电喇叭提供射频（RF）信号。反射器与馈电喇叭对准并由馈电喇叭照亮，并且包括反射栅格。当从天线系统的期望输出波束的地理位置观察时，反射栅格线基本上是平行的。根据本发明的方法包括用从馈电喇叭发出的RF信号照射反射器，馈电喇叭基本上位于反射器的焦点处，其中反射器包括反射栅格，并且将RF信号与反射栅格，其中从天线系统的期望输出光束的地理位置观察，反射栅格的线基本上平行。

6. 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。

7. 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。

8. 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。

9. 发明申请

US20080153481A1 FIXED CELL COMMUNICATION SYSTEM WITH REDUCED INTERFERENCE 有权
标题翻译：固定电话通信系统减少干扰
公开(公告)号：US20080153481A1
公开(公告)日：2008-06-26
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： H04Q7/20
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。

10. 发明授权

US6094175A Omni directional antenna 有权
标题翻译：全方位天线
公开(公告)号：US6094175A
公开(公告)日：2000-07-25
申请号：US193237
申请日：1998-11-17
申请人： Frank J. Alessi , Cynthia A. Dixon , Parthasarathy Ramanujam , Mon N. Wong
发明人： Frank J. Alessi , Cynthia A. Dixon , Parthasarathy Ramanujam , Mon N. Wong
IPC分类号： H01Q1/40 , H01Q1/42 , H01Q13/02 , H01Q19/10 , H01Q13/00
CPC分类号： H01Q19/10 , H01Q1/405 , H01Q1/42 , H01Q13/0208 , H01Q19/102 , H01Q19/104
摘要： A dual band omni directional antenna is disclosed. A dielectric cylinder supports a cone shaped reflector over a corrugated radio frequency horn. Orthogonal mode transducers produce and conduct circularly polarized radio frequency waves within the horn. The reflector, the horn, and the transducers are all coaxially disposed. The antenna produces a torodial radiation pattern in a plane that is substantially orthogonal to the axis of the antenna. Transmit and receive functions may be performed simultaneously using a single reflector and two orthogonal mode transducers.
摘要翻译：公开了一种双频带全向天线。介质圆筒支撑在波形射频喇叭上的锥形反射器。正交模式换能器在喇叭内产生并传导圆偏振射频。反射器，喇叭和换能器都同轴设置。天线在与天线的轴线基本正交的平面中产生一个横波辐射图。可以使用单个反射器和两个正交模式换能器同时执行发射和接收功能。

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