公开(公告)号：EP0277206B1

公开(公告)日：1993-08-25

申请号：EP87905498.9

申请日：1987-07-23

Applicant: Hughes Aircraft Company

Inventor： ROSEN, Harold, A.

IPC: H01Q5/00 ,  H01Q25/00

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.

公开(公告)号：EP0278982B1

公开(公告)日：1993-01-13

申请号：EP87906482.2

申请日：1987-07-23

Applicant: Hughes Aircraft Company

Inventor： ROSEN, Harold, A. ,  THOMPSON, James, D.

IPC: H04B7/185 ,  H01Q25/00

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。 点到点子系统通过覆盖要被维护的地球区域的多个连续区域（32,34,36,38）重新分配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）提供多区域频率地址功能。 卫星（10）采用滤波器互连矩阵（90），用于以允许对所分配频率的整个频带进行多次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。 变送器的互调产品在地理上分散。

公开(公告)号：EP0277173B1

公开(公告)日：1992-09-09

申请号：EP87905081.3

申请日：1987-07-23

Applicant: Hughes Aircraft Company

Inventor： ROSEN, Harold, A.

IPC: H04B7/185 ,  H01Q25/00

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

Abstract: A satellite communications 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。 点到点子系统通过覆盖要被维护的地球区域的多个连续区域（32,34,36,38）重新分配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）提供多区域频率地址功能。 卫星（10）采用滤波器互连矩阵（90），用于以允许对所分配频率的整个频带进行多次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。 变送器的互调产品在地理上分散。

公开(公告)号：EP0287582B1

公开(公告)日：1991-01-30

申请号：EP87905989.7

申请日：1987-08-28

Applicant: Hughes Aircraft Company

Inventor： ROSEN, Harold, A.

IPC: B64G1/14 ,  B64G1/10

CPC classification number: F02K9/56 ,  B64G1/002 ,  B64G1/007 ,  B64G1/14 ,  B64G1/242 ,  B64G1/401 ,  B64G1/402

Abstract: An apparatus and method for launching a spacecraft (200) including a payload (202) and a delivery stage (204) having a rocket engine (37) powered by fluid bipropellant (114) from the earth into a high energy orbit and for recovering the delivery stage (204). By reducing the delivery stage mass, it becomes feasible and cost effective to recover the delivery stage (204) for reuse. Delivery stage mass is reduced by several techniques including transporting the spacecraft (200) and the fluid bipropellant (114) to a parking orbit with the fluid bipropellant in tanks (20-26) external to the spacecraft (200); transferring the fluid bipropellant (114) to light weight tanks (30-36) integral to the spacecraft (200); controlling the relative flow rates of the fluid bipropellant constituents to the rocket engine (31) during firing of the rocket engine (37) to ensure complete use of both bipropellant constituents; and controlling ascent and descent maneuvers from remote tracking stations. A space shuttle (42) can be used to transport the spacecraft (200) and fluid bipropellant (114) in its cargo bay (40) to the parking orbit and recover the delivery stage (204) at the end of a mission. The invention is particularly useful for delivery of payloads to geosynchronous orbits.

公开(公告)号：EP0243398B1

公开(公告)日：1990-03-07

申请号：EP86906071.5

申请日：1986-09-15

Applicant: Hughes Aircraft Company

Inventor： ROSEN, Harold, A.

IPC: F02K9/56

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.

公开(公告)号：EP0316405A1

公开(公告)日：1989-05-24

申请号：EP88904831.0

申请日：1988-05-06

Applicant: HUGHES AIRCRAFT COMPANY

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

IPC: H03F1 ,  H03F3

CPC classification number: H03F1/0244 ,  H03F3/2178

Abstract: Un amplificateur d'enveloppe à rendement élevé (20) comporte une alimentation électrique (24), un comparateur (60), et plusieurs commutateurs (26-38). L'alimentation électrique (24) peut fournir de multiples sorties. Le comparateur (60) mesure l'amplitude d'un signal d'entrée par rapport à un parmi plusieurs niveaux de seuil. Lorsque le signal d'entrée se situe dans une plage prédéterminée, une sortie sélectionnée d'alimentation électrique est commutée sur le cheminement de sortie. La présente invention permettant la commutation incrémentielle de faibles quantités de puissance, les pertes de commutation sont sensiblement atténuées.

公开(公告)号：EP0290509A1

公开(公告)日：1988-11-17

申请号：EP87907202.0

申请日：1987-10-19

Applicant: Hughes Aircraft Company

Inventor： ROSEN, Harold, A.

IPC: H04B7

CPC classification number: H04B7/1853

Abstract: Système de communications par satellite permettant la communication entre des postes mobiles (11, 12, 14) et fixes (16). Le système de communications comprend une pluralité d'utilisateurs mobiles (11), un satellite (33) en orbite géo-synchrone envoyant des signaux de liaison montante et descendante adressables en fréquence aux postes mobiles (11, 12, 14), une station de base (10) recevant les signaux provenant du satellite et transmettant des signaux vers ce dernier et une pluralité d'utilisateurs fixes (16) couplés à la station de base (10). Ce système présente l'avantage de la réutilisation des fréquences et l'adressage en fréquence des émissions à liaison montante et descendante des utilisateurs mobiles (11, 12, 14).

公开(公告)号：EP0277984A1

公开(公告)日：1988-08-17

申请号：EP87905335.0

申请日：1987-07-23

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： ROSEN, Harold, A.

IPC: H01Q19 ,  H01Q3 ,  H01Q25 ,  H04B7

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。 点到点子系统通过覆盖要被维护的地球区域的多个连续区域（32,34,36,38）重新分配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）提供多区域频率地址功能。 卫星（10）采用滤波器互连矩阵（90），用于以允许对所分配频率的整个频带进行多次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。 变送器的互调产品在地理上分散。

公开(公告)号：EP0277205A1

公开(公告)日：1988-08-10

申请号：EP87905497.0

申请日：1987-07-23

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： ROSEN, Harold, A.

IPC: H01Q19 ,  H01Q3 ,  H01Q25 ,  H04B7

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。 点到点子系统通过覆盖要被维护的地球区域的多个连续区域（32,34,36,38）重新分配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）提供多区域频率地址功能。 卫星（10）采用滤波器互连矩阵（90），用于以允许对所分配频率的整个频带进行多次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。 变送器的互调产品在地理上分散。

公开(公告)号：EP0277188A1

公开(公告)日：1988-08-10

申请号：EP87905336.0

申请日：1987-07-23

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： ROSEN, Harold, A.

IPC: H04B7 ,  H01Q25

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。 点到点子系统通过覆盖要被维护的地球区域的多个连续区域（32,34,36,38）重新分配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）提供多区域频率地址功能。 卫星（10）采用滤波器互连矩阵（90），用于以允许对所分配频率的整个频带进行多次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。 变送器的互调产品在地理上分散。