公开(公告)号：US5444449A

公开(公告)日：1995-08-22

申请号：US168875

申请日：1993-12-15

申请人： Peter Poskett ,  Dennis Mullins ,  Shimichi Nomoto ,  Stephane Gosselin

发明人： Peter Poskett ,  Dennis Mullins ,  Shimichi Nomoto ,  Stephane Gosselin

IPC分类号： H04B7/185 ,  H04B7/204 ,  G01S5/02

CPC分类号： H04B7/18513 ,  H04B7/2041

摘要： A satellite system facilitates communications between earth stations and both geostationary satellites and non-geostationary satellites in an orbit at a lower altitude than that of said the geostationary satellites by preventing the non-geostationary satellite from transmitting signals that might possibly interfere with signals transmitted by the geostationary satellites. The non-geostationary satellite includes position acquisition subsystem for determining the position, and in particular the latitude, of the non-geostationary satellite relative to the surface of the earth. A data processor determines a forbidden band of locations on the surface of the earth all possible geostationary satellites and the non-geostationary satellite, at its determined position, are separated by less than a specified minimum discrimination angle. An antenna control subsystem in the non-geostationary satellite controls transmission of signal energy from the non-geostationary satellite in accordance with the satellites position so as to prevent transmission of signal energy from the non-geostationary satellite to said locations within the forbidden band.

摘要翻译： 一个卫星系统通过防止非对地静止卫星传输可能干扰由对地静止卫星发射的信号的信号，促进地球站与轨道之间的地球静止卫星和非对地静止卫星的距离低于所述对地静止卫星的距离。 对地静止卫星 非对地静止卫星包括位置采集子系统，用于确定非对地静止卫星相对于地表的位置，特别是纬度。 数据处理器确定地球表面上的所有可能的对地静止卫星上的位置的禁带，而在其确定的位置处的非对地静止卫星被分开小于指定的最小识别角。 非对地静止卫星中的天线控制子系统根据卫星位置控制来自非对地静止卫星的信号能量传输，以防止信号能量从非对地静止卫星传输到禁止频带内的所述位置。

公开(公告)号：US06236834B1

公开(公告)日：2001-05-22

申请号：US08976687

申请日：1997-11-24

申请人： Peter Poskett ,  Dennis Mullins ,  Shinichi Nomoto ,  Stephane Gosselin

发明人： Peter Poskett ,  Dennis Mullins ,  Shinichi Nomoto ,  Stephane Gosselin

IPC分类号： H04B7185

CPC分类号： H04B7/18513 ,  H04B7/2041

摘要： A method and apparatus for preventing interference between a first satellite and a second satellite which share frequencies for their up or down links is disclosed. A ground station receives downlink interference above an acceptable threshold from the first satellite if the first satellite and the second satellite are separated, relative to the ground station, by less than a minimum discrimination angle. Likewise, the first satellite receives unacceptable uplink interference from the ground station in that situation. To overcome the problem of interference, the second satellite is prevented from transmitting to or receiving from a forbidden area of the earth's surface. The forbidden area may either be determined as an area within which the first satellite and the second satellite are separated by less that the minimum discrimination angle, or as a band within which the first satellite is separated by less than the minimum discrimination angle from any point within an orbital band within which the second satellite is located. Communications to and from the forbidden area are either handed over to other areas outside the forbidden area for routing into the forbidden area through a ground network, or are handed over to another satellite.

摘要翻译： 公开了一种用于防止共享第一卫星和第二卫星之间的干扰的方法和装置，该卫星共享其上行或下行链路的频率。 如果第一卫星和第二卫星相对于地面站分开小于最小鉴别角，则地面站从第一卫星接收高于可接受阈值的下行链路干扰。 同样，在这种情况下，第一颗卫星从地面站接收到不可接受的上行链路干扰。 为了克服干扰问题，防止第二颗卫星向地球表面的禁区发射或接收。 禁止区域可以被确定为第一卫星和第二卫星在最小鉴别角度之下分开的区域，或者作为第一卫星从任何点分开小于最小鉴别角度的频带 在第二颗卫星所在的轨道区域内。 通往禁区的通信被移交到禁区外的其他地区，通过地面网络进入禁区，或者交给另一颗卫星。

公开(公告)号：US06340948B1

公开(公告)日：2002-01-22

申请号：US08722071

申请日：1997-06-17

申请人： Samuel Munoz-Garcia ,  Shinichi Nomoto ,  Peter Poskett ,  Dennis Mullins ,  Ben Hutchinson ,  Patrick Chomet

发明人： Samuel Munoz-Garcia ,  Shinichi Nomoto ,  Peter Poskett ,  Dennis Mullins ,  Ben Hutchinson ,  Patrick Chomet

IPC分类号： H01Q322

CPC分类号： H01Q25/00 ,  H01Q1/288 ,  H01Q3/26 ,  H01Q3/40 ,  H01Q21/22 ,  H04B7/2041 ,  Y02D70/122 ,  Y02D70/446

摘要： A communication station for generating or receiving an angularly dispersed array of radiation beams, comprising an array of radiating elements (100) defining an array antenna (1); and a beam former (120), the beam former comprising a passive network having a first side (X) carrying a plurality of beam ports for electrical signals corresponding to the beams and a second side (Y) carrying a plurality of antenna ports corresponding to the radiating elements, each beam port being connected to a plurality of antenna ports via a network (50) of power divider (52) and phase shifter (53) components, the phase shifts of which are in integer multiples of a predetermined constant, so as to generate the array of beams; in which the array antenna (1) has triangular or hexagonal symmetry and the array of beams has triangular or hexagonal symmetry.

摘要翻译： 一种用于产生或接收角度分散的辐射束阵列的通信站，包括限定阵列天线（1）的辐射元件阵列（100）; 和光束形成器（120），所述光束形成器包括无源网络，所述无源网络具有承载用于对应于所述光束的电信号的多个光束端口的第一侧面（X）和承载对应于所述光束的多个天线端口的第二侧面 辐射元件，每个光束端口经由功率分配器（52）的网络（50）和移相器（53）分量连接到多个天线端口，其相移是预定常数的整数倍，因此 以产生梁的阵列; 其中阵列天线（1）具有三角形或六边形对称，并且光束阵列具有三角形或六边形对称。