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    Low cost space-fed reconfigurable phased array for spacecraft and aircraft applications
    3.
    发明授权
    Low cost space-fed reconfigurable phased array for spacecraft and aircraft applications 有权

    公开(公告)号：US10135137B2

    公开(公告)日：2018-11-20

    申请号：US14627053

    申请日：2015-02-20

    申请人： NORTHROP GRUMMAN SYSTEMS CORPORATION

    发明人： Sudhakar K. Rao ,  Arun K. Bhattacharyya

    IPC分类号： H01Q1/28 ,  H01Q3/26 ,  H01Q13/02 ,  H01Q21/00

    摘要： A phased array antenna system including a front-end circuit having a plurality of antenna channels, each including a front antenna element and a rear antenna element, that provides a spatially combined beam. Each antenna channel includes a beam scan phase shifter and a true time delay phase shifter through which the receive signals or the transmit signals propagate. The system further includes a back-end circuit spaced from the front-end circuit and including an antenna receiving the receive signals from the rear elements or transmitting the transmit signals to the rear elements. The back-end circuit further includes an ortho-mode transducer that separates the transmit signal or the receive signal into orthogonally polarized signals, and a pair of couplers and a pair of polarization phase shifters that combine to adjust the polarization of the transmit signal or the receive signal. The spatially combined beam is reconfigurable in beam shape and its location.

    Antenna array using sandwiched radiating elements above a ground plane and fed by a stripline
    5.
    发明授权
    Antenna array using sandwiched radiating elements above a ground plane and fed by a stripline 有权
    天线阵列使用夹层辐射元件在地平面上方并由带状线馈送

    公开(公告)号：US09502780B2

    公开(公告)日：2016-11-22

    申请号：US14597785

    申请日：2015-01-15

    申请人： Northrop Grumman Systems Corporation

    发明人： Loc B. Chau ,  Sudhakar K. Rao ,  Steven J. Mass ,  Dana Quincey

    IPC分类号： H01Q1/38 ,  H01Q21/24 ,  H01Q9/28 ,  H01Q21/06

    CPC分类号： H01Q21/24 ,  H01Q9/285 ,  H01Q21/062

    摘要： An exemplary antenna array has first self-complementary antenna cells, e.g. bowtie antennas, disposed in a first plane in rows and columns. Additional bowtie antenna cells are disposed in a second plane parallel to the first plane and are aligned in corresponding rows and columns. A first stripline disposed between the first and second planes carries RF signals to/from the first and second bowtie antenna cells. A slot feed couples the RF signals between the first stripline and each of the first and second bowtie antenna cells. A conductive layer in a third plane parallel to the first and second planes serves as a ground plane for signals radiated from/to the first and second bowtie antenna cells.

    摘要翻译： 示例性天线阵列具有第一自互补天线单元，例如， bowtie天线，以行和列布置在第一平面中。 另外的蝴蝶结天线单元设置在与第一平面平行的第二平面中并且对齐在相应的行和列中。 设置在第一和第二平面之间的第一带状线将RF信号传送到第一和第二弓状天线单元。 缝隙馈送将RF信号耦合在第一带状线与第一和第二胎圈天线单元中的每一个之间。 平行于第一和第二平面的第三平面中的导电层用作从第一和第二弓形天线单元辐射的信号的接地平面。

    ANTENNA ARRAY USING SANDWICHED RADIATING ELEMENTS ABOVE A GROUND PLANE AND FED BY A STRIPLINE
    6.
    发明申请
    ANTENNA ARRAY USING SANDWICHED RADIATING ELEMENTS ABOVE A GROUND PLANE AND FED BY A STRIPLINE 有权
    天线阵列在地面平面上划线，并通过条纹划分

    公开(公告)号：US20160211585A1

    公开(公告)日：2016-07-21

    申请号：US14597785

    申请日：2015-01-15

    申请人： Northrop Grumman Systems Corporation

    发明人： Loc B. Chau ,  Sudhakar K. Rao ,  Steven J. Mass ,  Dana Quincey

    IPC分类号： H01Q21/24 ,  H01Q9/28

    CPC分类号： H01Q21/24 ,  H01Q9/285 ,  H01Q21/062

    摘要： An exemplary antenna array has first self-complementary antenna cells, e.g. bowtie antennas, disposed in a first plane in rows and columns. Additional bowtie antenna cells are disposed in a second plane parallel to the first plane and are aligned in corresponding rows and columns. A first stripline disposed between the first and second planes carries RF signals to/from the first and second bowtie antenna cells. A slot feed couples the RF signals between the first stripline and each of the first and second bowtie antenna cells. A conductive layer in a third plane parallel to the first and second planes serves as a ground plane for signals radiated from/to the first and second bowtie antenna cells.

    摘要翻译： 示例性天线阵列具有第一自互补天线单元，例如， bowtie天线，以行和列布置在第一平面中。 另外的蝴蝶结天线单元设置在与第一平面平行的第二平面中并且对齐在相应的行和列中。 设置在第一和第二平面之间的第一带状线将RF信号传送到第一和第二弓状天线单元。 缝隙馈送将RF信号耦合在第一带状线与第一和第二胎圈天线单元中的每一个之间。 平行于第一和第二平面的第三平面中的导电层用作从第一和第二弓形天线单元辐射的信号的接地平面。

    Integrated antenna and RF payload for low-cost inter-satellite links using super-elliptical antenna aperture with single axis gimbal
    9.
    发明授权
    Integrated antenna and RF payload for low-cost inter-satellite links using super-elliptical antenna aperture with single axis gimbal 有权
    集成天线和RF有效载荷，用于使用单轴万向节的超椭圆天线孔径的低成本卫星间链路

    公开(公告)号：US09590299B2

    公开(公告)日：2017-03-07

    申请号：US14739540

    申请日：2015-06-15

    申请人： NORTHROP GRUMMAN SYSTEMS CORPORATION

    发明人： Sudhakar K. Rao ,  Daniel H. Roper ,  Alan M. Taft ,  Sebong Chun ,  Christopher S. Brown ,  Mansoor K. Siddique

    IPC分类号： H01Q3/12 ,  H01Q3/20 ,  H01Q19/13 ,  H01Q1/28 ,  H01Q3/06 ,  H01Q19/19

    CPC分类号： H01Q3/20 ,  H01Q1/288 ,  H01Q3/06 ,  H01Q19/132 ,  H01Q19/134 ,  H01Q19/193

    摘要： A dual-reflector inter-satellite link (ISL) subsystem, for a communications satellite in a constellation of satellites in low earth orbit or medium earth orbit. The ISL subsystem includes a main antenna reflector which uses a single-axis gimbal to steer the main reflector only in the elevation plane. An antenna subreflector, a horn and RF feed circuitry are stationary with respect to the host satellite. The main reflector has a super-elliptical design which provides a beam shape which requires no steering in the azimuth plane, while meeting ISL signal strength requirements. By steering the main reflector only, and only in the elevation plane, the disclosed ISL subsystem delivers significantly lower size, mass, complexity and cost, and significantly greater reliability, than traditional ISL systems.

    摘要翻译： 用于低地球轨道或中等轨道卫星星座中的通信卫星的双反射器卫星间链路（ISL）子系统。 ISL子系统包括主天线反射器，其使用单轴万向架仅在仰角平面中引导主反射器。 天线子反射器，喇叭和RF馈电电路相对于主卫星是固定的。 主反射器具有超椭圆形设计，其提供了在方位平面中不需要转向的梁形状，同时满足ISL信号强度要求。 通过仅转向主反射器，仅在高程平面上，与传统的ISL系统相比，所公开的ISL子系统显着降低了尺寸，质量，复杂性和成本，并显着提高了可靠性。

    Antenna for multiple frequency bands
    10.
    发明授权
    Antenna for multiple frequency bands 有权
    多频段天线

    公开(公告)号：US09246234B2

    公开(公告)日：2016-01-26

    申请号：US14034688

    申请日：2013-09-24

    申请人： Northrop Grumman Systems Corporation

    发明人： Sudhakar K. Rao ,  Sebong Chun

    IPC分类号： H01Q19/19 ,  H01Q1/28 ,  H01Q5/55

    CPC分类号： H01Q19/193 ,  H01Q1/28 ,  H01Q5/55 ,  H01Q19/19

    摘要： An exemplary embodiment of an antenna in accordance with the present invention utilizes a sub-reflector and a main reflector with each of them having its own focal-ring type geometry. The antenna cooperates with a signal transmission feed disposed at the center of the antenna axis between the first and main reflectors to emit radio signals towards the sub-reflector. The sub-reflector reflects radio waves towards a main reflector which in turn reflects the radio waves to form the beam pattern emitted by the antenna. The reflecting surface of the sub-reflector is formed by a portion of an axially-displaced ellipse rotated about the antenna axis. The reflecting surface of the main reflector is defined by a section of a parabola rotated about the antenna axis to form a reflecting surface that concavely slopes away from the antenna axis. An embodiment of the antenna provides a wide coverage conical beam with selectable beam peaks that operate over a 2.25:1 frequency band range and provides substantially iso-flux beam density.

    摘要翻译： 根据本发明的天线的示例性实施例利用子反射器和主反射器，其中每个具有其自身的焦环型几何形状。 天线与设置在第一和反射器之间的天线轴的中心的信号传输馈送协作，以向子反射器发射无线电信号。 副反射器朝向主反射器反射无线电波，该主反射器又反射无线电波以形成由天线发射的波束图案。 副反射器的反射表面由围绕天线轴线旋转的轴向移位的椭圆的一部分形成。 主反射器的反射表面由围绕天线轴线旋转的抛物线的一部分限定，以形成远离天线轴线凹陷地倾斜的反射表面。 天线的一个实施例提供具有可选波束峰值的宽覆盖圆锥形波束，其在2.25：1频带范围内工作，并提供基本上等磁通量的光束密度。