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1. 发明申请

WO8807786A3 EQUAL POWER AMPLIFIER SYSTEM FOR ACTIVE PHASE ARRAY ANTENNA AND METHOD OF ARRANGING SAME 审中-公开
标题翻译：用于主动相阵列天线的等功率放大器系统及其安装方法
公开(公告)号：WO8807786A3
公开(公告)日：1989-01-26
申请号：PCT/US8800478
申请日：1988-02-19
申请人： HUGHES AIRCRAFT CO
发明人： THOMPSON JAMES D
IPC分类号： H01Q3/30 , H01P5/12 , H01Q3/22 , H01Q21/22 , H03F3/60
CPC分类号： H01Q21/22 , H01Q3/22 , H03F3/602 , H03F2200/198 , Y10S343/02
摘要： An equal power amplifier system (100) for amplifying a plurality of signals for transmission by an active phase array antenna (20), and a compact plural level beam-forming network (98) for forming a plurality of such signals, for example on excitation patterns for frequency scanned virtual beams, are disclosed. The amplifier system uses at most only a few sizes of power amplifiers (130, 134) to amplify efficiently numerous signals having significantly different amplitudes. This is accomplished by distributing the task of amplifying signal pairs (Ai, Bi) composed of one large amplitude signal and one small amplitude signal to an equal power amplifying apparatus (130; 230), which includes two hybrid couplers (236, 238) and two equally sized power amplifiers (232, 234). The first hybrid coupler (236) divides the two signals (Ai, Bi) for input into the two power amplifiers. The second hybrid coupler (238) receives the intermediate amplified signals from the power amplifiers and through constructive and destructive interference produces amplified output signals (Ai*, Bi*) corresponding to the input signals. Also disclosed is a method for properly selecting pairs of signals from an amplitude distribution (200; 202) for application to such equal power amplifying apparatuses of the amplifier system in order to operate the power amplifiers therein at or near peak efficiency. The beam-forming network (98) is arranged on two levels to simplify interconnection of the selected pairs of outputs of its line summers (176) for input into the equal power amplifier system. The amplifier system and beam-forming network may be used together, for example, in the transmit antenna system of a geosynchronous satellite (10) or mobile earth station.

2. 发明申请

WO8801455A3 FILTER INTERCONNECTION MATRIX 审中-公开
公开(公告)号：WO8801455A3
公开(公告)日：1988-04-07
申请号：PCT/US8701717
申请日：1987-07-23
申请人： HUGHES AIRCRAFT CO
发明人： ROSEN HAROLD A , THOMPSON JAMES D
IPC分类号： H01Q25/00 , H04B7/185
CPC分类号： H04B7/18515 , Y02D70/00 , Y02D70/446
摘要： 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.
摘要翻译：卫星通信系统采用独立的子系统来提供使用相同指定频段的广播和点对点双向通信。广播和点对点子系统采用一个使用普通反射器（12）的集成卫星天线系统。点对点子系统通过在覆盖要被服务的地球区域的多个连续区域（32,34,36,38）上重新使用所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沿东西方向引导的高增益下行链路扇形波束（29）提供服务。特殊波束形成网络（98）与阵列天线（20）一起提供多区域频率地址功能。卫星（10）采用滤波器互连矩阵（90），用于以允许整个频带的指定频率的多次重用的方式连接不同区域中的接地终端。单个固态发射器池可以让雨水不利用户以最低成本分配高于正常功率。发射机的互调产物在地理上是分散的。

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