公开(公告)号：US20160218436A1

公开(公告)日：2016-07-28

申请号：US14608070

申请日：2015-01-28

Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION

Inventor： SUDHAKAR K. RAO ,  DANIEL H. ROPER ,  ARUN K. BHATTACHARYYA

IPC: H01Q15/24 ,  H01Q13/02 ,  H01Q1/28 ,  H01Q21/30

CPC classification number: H01Q15/244 ,  H01P1/173 ,  H01P1/2131 ,  H01P1/2138 ,  H01Q1/288 ,  H01Q13/02 ,  H01Q13/0241 ,  H01Q21/064 ,  H01Q21/30

Abstract: A multiple beam integrated antenna system for a satellite including a support structure having an alignment plate. The antenna system further includes a plurality of feed horns mounted to the alignment plate, where each feed horn includes a plurality of tapered sections that support propagation modes for both up-link signals and down-link signals. A septum polarizer is mounted to an input end of each feed horn that converts linearly polarized signals to circularly polarized signals for the up-link signals and converts circularly polarized signals to linearly polarized signals for the down-link signals. A Y-shaped waveguide is coupled to each of the polarizers and includes separate receive reject and transmit reject filters so as to keep the up-link signals and the down-link signals from interfering with each other. Flex waveguides couple the transmit leg and the receive leg of each Y-shaped waveguide to RF modules.

Abstract translation: 一种用于卫星的多光束集成天线系统，包括具有对准板的支撑结构。 天线系统还包括安装到对准板的多个馈电喇叭，其中每个馈电喇叭包括支撑上行链路信号和下行链路信号的传播模式的多个锥形部分。 隔膜偏振器安装到每个馈电喇叭的输入端，其将线性偏振信号转换成用于上行链路信号的圆偏振信号，并将圆偏振信号转换成用于下行链路信号的线性偏振信号。 Y形波导耦合到每个偏振器，并且包括单独的接收拒绝和发射拒绝滤波器，以便保持上行链路信号和下行链路信号彼此干扰。 Flex波导将每个Y形波导的发射支路和接收支路耦合到RF模块。

公开(公告)号：US20160365630A1

公开(公告)日：2016-12-15

申请号：US14739540

申请日：2015-06-15

Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION

Inventor： SUDHAKAR K. RAO ,  Daniel H. Roper ,  Alan M. Taft ,  Sebong Chun ,  Christopher S. Brown ,  Mansoor K. Siddique

IPC: H01Q3/20 ,  H01Q19/13

CPC classification number: H01Q3/20 ,  H01Q1/288 ,  H01Q3/06 ,  H01Q19/132 ,  H01Q19/134 ,  H01Q19/193

Abstract: 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, is disclosed. 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.

Abstract translation: 公开了一种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。

公开(公告)号：US20160248157A1

公开(公告)日：2016-08-25

申请号：US14627053

申请日：2015-02-20

Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION

Inventor： SUDHAKAR K. RAO ,  ARUN K. BHATTACHARYYA

IPC: H01Q3/26

CPC classification number: H01Q3/2694 ,  H01Q1/28 ,  H01Q13/0258 ,  H01Q21/0018

Abstract: 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.

Abstract translation: 一种相控阵天线系统，包括具有多个天线通道的前端电路，每个天线通道包括前天线元件和后天线元件，其提供空间结合的光束。 每个天线通道包括波束扫描移相器和实时延时移相器，接收信号或发射信号通过该移相器传播。 该系统还包括与前端电路间隔开的后端电路，并且包括天线，其接收来自后部元件的接收信号或将发送信号发送到后部元件。 后端电路还包括将发射信号或接收信号分离成正交极化信号的正交模式换能器，以及一对耦合器和一对偏振移相器，其组合以调整发射信号的极化或 接收信号。 空间组合光束可以以波束形状及其位置重新配置。