公开(公告)号：WO1988001455A2

公开(公告)日：1988-02-25

申请号：PCT/US1987001717

申请日：1987-07-23

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  ROSEN, Harold, A. ,  THOMPSON, James, D.

IPC: H04B07/185

CPC classification number: H04B7/18515 ,  Y02D70/446

Abstract: A satellite communications system employs separate subsystems for providing broadcast and point-to-point two-way communications using the same assigned frequency band. The broadcast and point-to-point subsystems employ an integrated satellite antenna system which uses a common reflector (12). The point-to-point subsystem achieves increased communication capacity through the reuse of the assigned frequency band over multiple, contiguous zones (32, 34, 36, 38) covering the area of the earth to be serviced. Small aperture terminals in the zones are serviced by a plurality of high gain downlink fan beams (29) steered in the east-west direction by frequency address. A special beam-forming network (98) provides in conjunction with an array antenna (20) the multiple zone frequency address function. The satellite (10) employs a filter interconnection matrix (90) for connecting earth terminals in different zones in a manner which permits multiple reuse of the entire band of assigned frequencies. A single pool of solid state transmitters allows rain disadvantaged users to be assigned higher than normal power at minimum cost. The intermodulation products of the transmitters are geographically dispersed.

Abstract translation: 卫星通信系统采用单独的子系统，用于使用相同的分配频带提供广播和点对点双向通信。 广播和点对点子系统采用使用公共反射器（12）的集成卫星天线系统。 点对点子系统通过在覆盖要被维护的地球区域的多个连续区域（32,34,36,38）上重新使用分配的频带来实现增加的通信容量。 区域中的小孔径终端由多个通过频率地址在东西方向转向的高增益下行风扇波束（29）提供服务。 特殊的波束形成网络（98）结合阵列天线（20）提供多频带地址功能。 卫星（10）采用滤波器互连矩阵（90），用于以允许分配频率的整个频带的多重重用的方式在不同区域中连接接地端子。 一个单一的固态发射器池允许雨水处于不利地位的用户以最低的成本分配高于正常功率。 发射机的互调产物在地理上分散。

公开(公告)号：WO1988001445A1

公开(公告)日：1988-02-25

申请号：PCT/US1987001721

申请日：1987-07-23

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  ROSEN, Harold, A.

IPC: H01Q51/00

CPC classification number: H01Q25/001 ,  H01Q5/45 ,  Y10S343/02

Abstract: A satellite communications system employs separate subsystems for providing broadcast and point-to-point two-way communications using the same assigned frequency band. The broadcast and point-to-point subsystems employ an integrated satellite antenna system which uses a common reflector (12). The point-to-point subsystem achieves increased communication capacity through the reuse of the assigned frequency band over multiple, contiguous zones (32, 34, 36, 38) covering the area of the earth to be serviced. Small aperture terminals in the zones are serviced by a plurality of high gain downlink fan beams (29) steered in the east-west direction by frequency address. A special beam-forming network (98) provides in conjunction with an array antenna (20) the multiple zone frequency address function. The satellite (10) employs a filter interconnection matrix (90) for connecting earth terminals in different zones in a manner which permits multiple reuse of the entire band of assigned frequencies. A single pool of solid state transmitters allows rain disadvantaged users to be assigned higher than normal power at minimum cost. The intermodulation products of the transmitters are geographically dispersed.

Abstract translation: 卫星通信系统采用单独的子系统，用于使用相同的分配频带提供广播和点对点双向通信。 广播和点对点子系统采用使用公共反射器（12）的集成卫星天线系统。 点对点子系统通过在覆盖要被维护的地球区域的多个连续区域（32,34,36,38）上重新使用分配的频带来实现增加的通信容量。 区域中的小孔径终端由多个通过频率地址在东西方向转向的高增益下行风扇波束（29）提供服务。 特殊的波束形成网络（98）结合阵列天线（20）提供多频带地址功能。 卫星（10）采用滤波器互连矩阵（90），用于以允许分配频率的整个频带的多重重用的方式在不同区域中连接接地端子。 一个单一的固态发射器池允许雨水处于不利地位的用户以最低的成本分配高于正常功率。 发射机的互调产物在地理上分散。

公开(公告)号：WO1994015834A1

公开(公告)日：1994-07-21

申请号：PCT/US1993011758

申请日：1993-12-03

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  AHRENS, Allan, F. ,  ROSEN, Harold, A.

IPC: B64G01/42

CPC classification number: B64G1/443 ,  B64G1/428 ,  H02J7/35 ,  Y10S136/292 ,  Y10S136/293 ,  Y10S320/33 ,  Y10S323/906

Abstract: A spacecraft power bus regulation method and apparatus for a spacecraft. The spacecraft has solar arrays (10) and a battery (30) coupled to the spacecraft power bus (32) to drive electrical loads (34). A bus voltage limiter (38) controls the flow of current from the solar arrays while a bidirectional battery controller (36) controls power flow into and out of the battery. A processor (46) monitors current flow and battery condition using sensors (40, 42, 44, 48) and controls the bus voltage limiter accordingly. Auxiliary control is provided by the solar array drive (24) which controls the orientation of the solar arrays with respect to the sun.

Abstract translation: 航天器电力总线调节方法和装置。 航天器具有太阳能阵列（10）和耦合到航天器电力总线（32）以驱动电力负载（34）的电池（30）。 当双向电池控制器（36）控制电流进出电池时，总线限制器（38）控制来自太阳能电池阵列的电流流动。 处理器（46）使用传感器（40,42,44,48）监视电流和电池状况，并且相应地控制总线电压限制器。 辅助控制由太阳能阵列驱动器（24）提供，太阳能阵列驱动器控制太阳能阵列相对于太阳的取向。

公开(公告)号：WO1988004495A1

公开(公告)日：1988-06-16

申请号：PCT/US1987002668

申请日：1987-10-19

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  ROSEN, Harold, A.

IPC: H04B07/185

CPC classification number: H04B7/1853

Abstract: A satellite communications system that would allow for communication between mobile (11, 12, 14) and fixed terminals (16). The communications system includes a plurality of mobile users (11), a satellite (13) in geosynchronous orbit for providing frequency addressable uplink and downlink signals to the mobile terminals (11, 12, 14), a base station (10) for receiving signals from and transmitting signals to the satellite and a plurality of fixed users (16) coupled to the base station (10). The system provides the advantage of frequency reusability and frequency addressability in the uplink and downlink transmissions of the mobile users (11, 12, 14).

公开(公告)号：WO1988001441A1

公开(公告)日：1988-02-25

申请号：PCT/US1987001715

申请日：1987-07-23

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  ROSEN, Harold, A.

IPC: H01Q03/40

CPC classification number: H04B7/2041 ,  H01Q3/40 ,  H01Q25/00 ,  Y02D70/122 ,  Y02D70/446

Abstract: A satellite communications system employs separate subsystems for providing broadcast and point-to-point two-way communications using the same assigned frequency band. The broadcast and point-to-point subsystems employ an integrated satellite antenna system which uses a common reflector (12). The point-to-point subsystem achieves increased communication capacity through the reuse of the assigned frequency band over multiple, contiguous zones (32, 34, 36, 38) covering the area of the earth to be serviced. Small aperture terminals in the zones are serviced by a plurality of high gain downlink fan beams (29) steered in the east-west direction by frequency address. A special beam-forming network (98) provides in conjunction with an array antenna (20) the multiple zone frequency address function. The satellite (10) employs a filter interconnection matrix (90) for connecting earth terminals in different zones in a manner which permits multiple reuse of the entire band of assigned frequencies. A single pool of solid state transmitters allows rain disadvantaged users to be assigned higher than normal power at minimum cost. The intermodulation products of the transmitters are geographically dispersed.

Abstract translation: 卫星通信系统采用单独的子系统，用于使用相同的分配频带提供广播和点对点双向通信。 广播和点对点子系统采用使用公共反射器（12）的集成卫星天线系统。 点对点子系统通过在覆盖要被维护的地球区域的多个连续区域（32,34,36,38）上重新使用分配的频带来实现增加的通信容量。 区域中的小孔径终端由多个通过频率地址在东西方向转向的高增益下行风扇波束（29）提供服务。 特殊的波束形成网络（98）结合阵列天线（20）提供多频带地址功能。 卫星（10）采用滤波器互连矩阵（90），用于以允许分配频率的整个频带的多重重用的方式在不同区域中连接接地端子。 一个单一的固态发射器池允许雨水处于不利地位的用户以最低的成本分配高于正常功率。 发射机的互调产物在地理上分散。

公开(公告)号：WO1986003081A1

公开(公告)日：1986-05-22

申请号：PCT/US1985002166

申请日：1985-11-04

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  THOMPSON, James, D. ,  ROSEN, Harold, A. ,  PRESSMAN, Leeor

IPC: H04B07/185

CPC classification number: H04B7/18521

Abstract: A two-hop communications system utilizing two collocated spacecraft (Se and Sw) and two remote intersatellite exchange (RISE) means (Re and Rw) provides for communications between ground stations located in two or more defined subregions. Each satellite includes wide band transponders for relaying ground station transmissions to the RISEs. The RISEs convert first hop frequency division multiplexed (FDM) signals to time division multiplexed (TDM) for the second hop. Signals are coded by frequency, polarization and direction so as to avoid loss of bandwidth due to the two-hop approach.

公开(公告)号：WO1988010025A1

公开(公告)日：1988-12-15

申请号：PCT/US1988001463

申请日：1988-05-06

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  HUDSPETH, Thomas ,  KAPLAN, David, S. ,  ROSEN, Harold, A.

IPC: H03F01/02

CPC classification number: H03F1/0244 ,  H03F3/2178

Abstract: A high efficiency envelope amplifier (20) is disclosed. The invention includes a power supply (24), a comparator (60), and several switches (26-38). The power supply (24) is capable of providing multiple outputs. The comparator (60) measures the amplitude of an input signal against one of several threshold levels. When the input signal is within a predetermined range, a selected power supply output is switched onto the output path. Since the present invention incrementally switches small amounts of power, switching losses are substantially mitigated.

公开(公告)号：WO1988001456A1

公开(公告)日：1988-02-25

申请号：PCT/US1987001718

申请日：1987-07-23

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  ROSEN, Harold, A.

IPC: H04B07/185

CPC classification number: H04B7/2041 ,  H01Q25/00 ,  Y02D70/446

Abstract: A satellite communications system employs separate subsystems for providing broadcast and point-to-point two-way communications using the same assigned frequency band. The broadcast and point-to-point subsystems employ an integrated satellite antenna system which uses a common reflector (12). The point-to-point subsystem achieves increased communication capacity through the reuse of the assigned frequency band over multiple, contiguous zones (32, 34, 36, 38) covering the area of the earth to be serviced. Small aperture terminals in the zones are serviced by a plurality of high gain downlink fan beams (29) steered in the east-west direction by frequency address. A special beam-forming network (98) provides in conjunction with an array antenna (20) the multiple zone frequency address function. The satellite (10) employs a filter interconnection matrix (90) for connecting earth terminals in different zones in a manner which permits multiple reuse of the entire band of assigned frequencies. A single pool of solid state transmitters allows rain disadvantaged users to be assigned higher than normal power at minimum cost. The intermodulation products of the transmitters are geographically dispersed.

Abstract translation: 卫星通信系统采用单独的子系统，用于使用相同的分配频带提供广播和点对点双向通信。 广播和点对点子系统采用使用公共反射器（12）的集成卫星天线系统。 点对点子系统通过在覆盖要被维护的地球区域的多个连续区域（32,34,36,38）上重新使用分配的频带来实现增加的通信容量。 区域中的小孔径终端由多个通过频率地址在东西方向转向的高增益下行风扇波束（29）提供服务。 特殊的波束形成网络（98）结合阵列天线（20）提供多频带地址功能。 卫星（10）采用滤波器互连矩阵（90），用于以允许分配频率的整个频带的多重重用的方式在不同区域中连接接地端子。 一个单一的固态发射器池允许雨水处于不利地位的用户以最低的成本分配高于正常功率。 发射机的互调产物在地理上分散。

公开(公告)号：WO1988001454A1

公开(公告)日：1988-02-25

申请号：PCT/US1987001716

申请日：1987-07-23

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  ROSEN, Harold, A.

IPC: H04B07/185

CPC classification number: H01Q25/00 ,  H04B7/2041 ,  Y02D70/446

Abstract: A satellite communications system employs separate subsystems for providing broadcast and point-to-point two-way communications using the same assigned frequency band. The broadcast and point-to-point subsystems employ an integrated satellite antenna system which uses a common reflector (12). The point-to-point subsystem achieves increased communication capacity through the reuse of the assigned frequency band over multiple, contiguous zones (32, 34, 36, 38) covering the area of the earth to be serviced. Small aperture terminals in the zones are serviced by a plurality of high gain downlink fan beams (29) steered in the east-west direction by frequency address. A special beam-forming network (98) provides in conjunction with an array antenna (20) the multiple zone frequency address function. The satellite (10) employs a filter interconnection matrix (90) for connecting earth terminals in different zones in a manner which permits multiple reuse of the entire band of assigned frequencies. A single pool of solid state transmitters allows rain disadvantaged users to be assigned higher than normal power at minimum cost. The intermodulation products of the transmitters are geographically dispersed.

Abstract translation: 卫星通信系统采用单独的子系统，用于使用相同的分配频带提供广播和点对点双向通信。 广播和点对点子系统采用使用公共反射器（12）的集成卫星天线系统。 点对点子系统通过在覆盖要被维护的地球区域的多个连续区域（32,34,36,38）上重新使用分配的频带来实现增加的通信容量。 区域中的小孔径终端由多个通过频率地址在东西方向转向的高增益下行风扇波束（29）提供服务。 特殊的波束形成网络（98）结合阵列天线（20）提供多频带地址功能。 卫星（10）采用滤波器互连矩阵（90），用于以允许分配频率的整个频带的多重重用的方式在不同区域中连接接地端子。 一个单一的固态发射器池允许雨水处于不利地位的用户以最低的成本分配高于正常功率。 发射机的互调产物在地理上分散。

公开(公告)号：WO1987002098A1

公开(公告)日：1987-04-09

申请号：PCT/US1986001887

申请日：1986-09-15

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  ROSEN, Harold, A.

IPC: F02K09/56

CPC classification number: F02K9/56 ,  B64G1/007 ,  B64G1/401 ,  B64G1/402

Abstract: A method for controlling the utilization of a fluid bipropellant including two respective constituents separately in respective tanks aboard a spacecraft for consumption by a spacecraft rocket engine, comprising the steps of actuating the rocket engine; during the actuation of the rocket engine, providing a flow of bipropellant constituents to the rocket engine in a first proportion; after the actuation of the rocket engine, measuring the amount of at least one bipropellant constituent in a bipropellant tank containing the constituent; adjusting a pressure level within at least one bipropellant tank relative to a pressure level within another bipropellant tank based upon the amount of said at least one bipropellant constituent in a bipropellant tank containing said at least one constituent; after the measuring step, actuating the rocket engine; during the actuation of the rocket engine after the measuring step, providing a flow of bipropellant constituents to the rocket engine in a second proportion based upon said adjusted pressure level within said at least one bipropellant tank relative to a pressure level within said another bipropellant tank.

Abstract translation: 一种用于控制包括两个相应构件在内的液体双组元推进剂的利用的方法，所述两个组分分别在用于航天器火箭发动机消耗的航天器上的相应容器中，包括致动所述火箭发动机的步骤; 在火箭发动机的致动期间，以第一比例向火箭发动机提供双组元推进剂组分的流动; 在火箭发动机的致动之后，测量包含组分的双组元推进剂罐中的至少一个双组元推进剂组分的量; 基于包含所述至少一种成分的双组元推进剂罐中的所述至少一种双组元推进剂组分的量，调节至少一个双组元推进剂罐内相对于另一个双组元推进剂罐内的压力水平的压力水平; 在测量步骤之后，致动火箭发动机; 在所述测量步骤之后的所述火箭发动机的致动期间，基于所述至少一个双组元推进剂箱内的所述调节的压力水平相对于所述另一个双组元推进剂罐内的压力水平，以第二比例向所述火箭发动机提供双组分推进剂组分的流动。