公开(公告)号：US5485168A

公开(公告)日：1996-01-16

申请号：US360338

申请日：1994-12-21

申请人： Sharad V. Parekh

发明人： Sharad V. Parekh

IPC分类号： H01Q3/20

CPC分类号： H01Q3/20

摘要： A multiband satellite communication antenna system includes a primary reflector and one or more movable subreflectors. A system with one subreflector operates at a first band when the subreflector is in a deployed position and reflects energy between a first feed and the primary antenna. When the subreflector is at a second, stowed, position, the primary reflector operates directly into a second feed. A communication antenna system with two subreflectors can operate at three bands under the conditions of having either both subreflectors stowed; the first subreflector deployed and the second subreflector stowed; or both subreflectors deployed.

摘要翻译： 多频带卫星通信天线系统包括主反射器和一个或多个可移动子反射器。 当子反射器处于展开位置并且在第一馈电和主天线之间反射能量时，具有一个子反射器的系统在第一带操作。 当副反射器处于第二个存放位置时，主反射器直接进入第二进给。 具有两个子反射器的通信天线系统可以在两个副反射器收起的条件下在三个频带上操作; 第一个副反射器被部署，第二副反射器被存放; 或两个子反射器部署。

公开(公告)号：US4625214A

公开(公告)日：1986-11-25

申请号：US661163

申请日：1984-10-15

申请人： Sharad V. Parekh

发明人： Sharad V. Parekh

IPC分类号： H01Q15/14 ,  H01Q15/22 ,  H01Q25/00 ,  H01Q19/195

CPC分类号： H01Q15/22 ,  H01Q25/001

摘要： A dual gridded antenna reflector system and method for constructing the same is disclosed. The reflector system comprises a pair of reflector dishes each having a grid of parallel conductors. One of the reflector dishes is mounted over the other reflector dish by linear support ribs therebetween such that the conductors of the one reflector dish are perpendicular to the conductor of the other reflector dish. The linear support ribs are placed perpendicular to or parallel to the conductors of the overlapped reflector and are placed substantially outside of the high field region across the aperture of the overlapped reflector.

摘要翻译： 公开了一种双网格天线反射器系统及其构造方法。 反射器系统包括一对具有平行导体格栅的反射器盘。 反射器皿之一通过其间的线性支撑肋安装在另一个反射器盘上，使得一个反射器盘的导体垂直于另一个反射器盘的导体。 线性支撑肋垂直于或平行于重叠的反射体的导体放置，并且基本上放置在重叠反射体的孔的高场区域外部。

公开(公告)号：US4792770A

公开(公告)日：1988-12-20

申请号：US67324

申请日：1987-06-29

申请人： Sharad V. Parekh ,  Seymour W. Shapiro ,  Charles E. Profera, Jr.

发明人： Sharad V. Parekh ,  Seymour W. Shapiro ,  Charles E. Profera, Jr.

IPC分类号： H01P5/20 ,  H01P5/103 ,  H01P5/12 ,  H01P5/16 ,  H01P5/18

CPC分类号： H01P5/16

摘要： A reduced size waveguide directional coupler assembly includes a first rectangular waveguide which is adapted to receive signal at an input port. A conductive septum parallel with a broad wall of the rectangular waveguide divides the signal into two portions flowing in first and second channels within the first waveguide. The septum may be centered between the broad walls, in which case the two signal portions and channel dimensions are the same, or the septum may be off-center, resulting in dissimilar amplitudes of the two signal portions. The coupler also includes a second waveguide. Branch waveguides or other coupling apertures open from the first channel into the second waveguide. That energy not flowing to the second waveguide from the first channel may be routed to an independent output port, or may be recombined with the energy flowing in the second channel and routed to a combined output port. The coupler may include a third waveguide coupled by branch waveguides or other coupling apertures to the second channel. That energy not coupled from the second channel to the third waveguide may be coupled to an independent output port, or may be recombined with the residual energy from the first channel at a combined output port. A load may be coupled to the septum to dissipate unbalanced power.

摘要翻译： 减小尺寸的波导定向耦合器组件包括适于在输入端口处接收信号的第一矩形波导。 与矩形波导的宽壁平行的导电隔片将信号分成在第一波导内的第一和第二通道中流动的两个部分。 隔膜可以在宽壁之间居中，在这种情况下，两个信号部分和通道尺寸相同，或隔膜可能偏心，导致两个信号部分的不同幅度。 耦合器还包括第二波导。 分支波导或其他耦合孔从第一通道打开到第二波导中。 不能从第一通道流到第二波导的能量可以被路由到独立的输出端口，或者可以与在第二通道中流动的能量重组并被路由到组合的输出端口。 耦合器可以包括通过分支波导耦合的第三波导或者到第二通道的其它耦合孔。 从第二通道耦合到第三波导的能量可以耦合到独立的输出端口，或者可以在组合的输出端口与来自第一通道的剩余能量重组。 负载可以耦合到隔膜以消散不平衡功率。