公开(公告)号：US09590299B2

公开(公告)日：2017-03-07

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

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. 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: 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：US09698492B2

公开(公告)日：2017-07-04

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 ,  H01Q21/30 ,  H01Q13/02 ,  H01Q1/28 ,  H01P1/17 ,  H01P1/213 ,  H01Q21/06

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.

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。