ANTENNA SYSTEM FOR HYBRID COMMUNICATIONS SATELLITE
    41.
    发明授权
    ANTENNA SYSTEM FOR HYBRID COMMUNICATIONS SATELLITE 失效
    用于混合通信的天线系统卫星

    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

    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.

    FILTER INTERCONNECTION MATRIX
    42.
    发明授权
    FILTER INTERCONNECTION MATRIX 失效
    滤波器互连矩阵

    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

    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。

    SATELLITE COMMUNICATIONS SYSTEM HAVING FREQUENCY ADDRESSABLE HIGH GAIN DOWNLINK BEAMS
    43.
    发明授权
    SATELLITE COMMUNICATIONS SYSTEM HAVING FREQUENCY ADDRESSABLE HIGH GAIN DOWNLINK BEAMS 失效
    卫星通信系统具有频率可寻址的高增益下行链路

    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

    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。

    A METHOD AND APPARATUS FOR LAUNCHING A SPACECRAFT BY USE OF A RECOVERABLE UPPER ROCKET STAGE
    44.
    发明授权
    A METHOD AND APPARATUS FOR LAUNCHING A SPACECRAFT BY USE OF A RECOVERABLE UPPER ROCKET STAGE 失效
    一种通过使用可恢复的上位机阶段来启动空间的方法和装置

    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

    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.

    A METHOD FOR CONTROLLING THE UTILIZATION OF FLUID BIPROPELLANT IN A SPACECRAFT ROCKET ENGINE
    45.
    发明授权
    A METHOD FOR CONTROLLING THE UTILIZATION OF FLUID BIPROPELLANT IN A SPACECRAFT ROCKET ENGINE 失效
    一种控制液化石油气开发利用的方法

    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

    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.

    ENVELOPE AMPLIFIER
    46.
    发明公开
    ENVELOPE AMPLIFIER 失效
    包络线放大器。

    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

    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.

    SATELLITE COMMUNICATIONS SYSTEM FOR MOBILE USERS
    47.
    发明公开
    SATELLITE COMMUNICATIONS SYSTEM FOR MOBILE USERS 失效
    卫星通信系统为移动用户。

    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

    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).

    BEAM-FORMING NETWORK
    48.
    发明公开
    BEAM-FORMING NETWORK 失效
    NETZWERK ZUR STRAHLFORMUNG。

    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

    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。

    SATELLITE COMMUNICATIONS SYSTEM EMPLOYING FREQUENCY REUSE
    49.
    发明公开
    SATELLITE COMMUNICATIONS SYSTEM EMPLOYING FREQUENCY REUSE 失效
    SATELLITENÜBERTRAGUNGSSYSTEMMIT FREQUENZWIEDERGEBRAUCH。

    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

    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。

    SATELLITE COMMUNICATIONS SYSTEM HAVING MULTIPLE DOWNLINK BEAMS POWERED BY POOLED TRANSMITTERS
    50.
    发明公开
    SATELLITE COMMUNICATIONS SYSTEM HAVING MULTIPLE DOWNLINK BEAMS POWERED BY POOLED TRANSMITTERS 失效
    麻省理工学院食品科学与技术学院德国美国人GEMEINSAMEN SENDER GESPEISTEN VIELFACH-ABWÄRTSRICHTSTRAHLENBÜNDELN。

    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

    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。

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