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1.发明授权On-orbit reconfigurability of a shaped reflector with feed/reflector defocusing and reflector gimballing 失效具有进料/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
IPC分类号： H01Q19/18 , H01Q1/18 , H01Q1/28 , H01Q3/16 , H01Q3/18 , H01Q3/20 , H01Q15/14 , H01Q3/12 , H01Q19/10
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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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。
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3.发明授权Method for reducing cross-polar degradation in multi-feed dual offset reflector antennas 失效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
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。
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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
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。
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5.发明授权Rotatable and scannable reconfigurable shaped reflector with a movable feed system 有权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
IPC分类号： H01Q1300
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。
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6.发明授权Shaped dual reflector antenna system for generating a plurality of beam coverages 失效形状的双反射器天线系统，用于产生多个光束覆盖
公开(公告)号：US5546097A
公开(公告)日：1996-08-13
申请号：US994834
申请日：1992-12-22
CPC分类号： H01Q25/007
摘要： A dual-reflector antenna system (40) is provided for generating a shaped main beam radiation pattern (20) and at least one additional secondary spot beam radiation pattern (30,32). The antenna system (40) includes a main shaped reflector (10) having a shaped reflective surface (11) operatively coupled to a subreflector (12) for communicating therewith. A main feed horn (14) communicates directly with the subreflector (12) so as to reflect first energy to and from the main reflector (10) within a shaped beam radiation pattern (20). In a preferred embodiment, the subreflector (12) has an ellipsoidal reflective surface (13) which communicates directly with the main reflector (10) via an inverted reflective path (17) which has a converging focal point (18). One or more auxiliary feed horns (24,26) are operatively coupled directly to the main reflector so as to directly communicate therewith and reflect second energy within one or more additional radiation patterns (30,32). The first and second feed horns (24,26) are preferably located separate from the reflective path (17) so as to avoid interference therewith. In an alternate embodiment, a subreflector (12') with a hyperboloidal reflective surface (13') may be used.
摘要翻译： 提供双反射器天线系统（40），用于产生成形的主光束辐射图（20）和至少一个附加次点光束辐射图（30,32）。 天线系统（40）包括主成形反射器（10），其具有可操作地耦合到子反射器（12）的成形反射表面（11），用于与其连通。 主馈电喇叭（14）直接与子反射器（12）通信，以便在成形的射束辐射图案（20）内将第一能量反射到主反射器（10）。 在优选实施例中，副反射器（12）具有经由具有会聚焦点（18）的反向反射路径（17）与主反射器（10）直接连通的椭圆面反射表面（13）。 一个或多个辅助馈电喇叭（24,26）可操作地耦合到主反射器，以便与其直接通信并将第二能量反射到一个或多个附加辐射图案（30,32）内。 第一和第二馈电喇叭（24,26）优选地与反射路径（17）分离，以避免与其的干涉。 在替代实施例中，可以使用具有双曲面反射表面（13'）的子反射器（12'）。
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公开(公告)号：US6094175A
公开(公告)日：2000-07-25
申请号：US193237
申请日：1998-11-17
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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8.发明授权Reconfigurable satellite and antenna coverage communications backup capabilities 有权可重构卫星和天线覆盖通信备份功能公开(公告)号：US06438354B2
公开(公告)日：2002-08-20
申请号：US09222419
申请日：1998-12-23
申请人： James D. Thompson , Parthasarathy Ramanujam , Cynthia A. Dixon , Debbie H. Feuerborn , David R. Goldberg , Stephen F. Sichi , Lomash J. Shah , John R. Dunwoody
发明人： James D. Thompson , Parthasarathy Ramanujam , Cynthia A. Dixon , Debbie H. Feuerborn , David R. Goldberg , Stephen F. Sichi , Lomash J. Shah , John R. Dunwoody
IPC分类号： H04B7185
CPC分类号： H04B7/2041 , H04B7/18519
摘要： A reconfigurable payload for a satellite having a flexible antenna system, a variable downconverter technology and a filter technology that all work in combination to allow the payload of a satellite to be reconfigured in orbit.
摘要翻译： 具有柔性天线系统的卫星的可重新配置的有效载荷，可变下变频器技术和滤波器技术，它们都组合起来以使卫星的有效载荷在轨道上重新配置。
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公开(公告)号：US06628238B2
公开(公告)日：2003-09-30
申请号：US09992259
申请日：2001-11-19
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。
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10.发明授权公开(公告)号：US06366256B1
公开(公告)日：2002-04-02
申请号：US09665720
申请日：2000-09-20
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。
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