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    • 2. 发明授权
    • Multiple-beam antenna system with active modules and digital beam-forming
    • 具有有源模块和数字波束形成的多波束天线系统
    • US5034752A
    • 1991-07-23
    • US544321
    • 1990-06-27
    • Jean-Louis PouraillyJoseph Roger
    • Jean-Louis PouraillyJoseph Roger
    • H01Q3/26H01Q21/00H01Q23/00H01Q25/00
    • H01Q21/0025H01Q25/00H01Q3/26
    • Such a system typically comprises: a plurality of elementary antennas configured in an array, each having an associated active module, a plurality of DBF modules, each receiving a microwave signal coming from the active modules and delivering complex digital data (I, Q) representing the input signal; and DBF processor means preparing weighted sums on the basis of this complex digital data, the weighting corresponding to a reception channel defining a narrow beam of the radiation pattern of the antenna. The system further comprises a plurality of prefiltering spatial circuits, each of which receives a plurality of signals coming from the active module and delivers, to an associated DBF module, a signal which is a sum, weighted in amplitude, of certain of the signals received at input, each DBF module being thus associated with a sub-array, the different sub-arrays thus forming being imbricated with one another and the weighting being chosen so that the pattern of the sub-array is a sectoral pattern that essentially lets through only the signals coming from a restricted zone of space. The number of spatial prefiltering circuits and DBF modules is smaller than that of the elementary antennas, and the processor means simultaneously process the outputs signals from the spatial prefiltering circuits so as to obtain, for the radiation pattern of the antenna, an equivalent number of simultaneous, distinct beams of homogeneous quality.
    • 这样的系统通常包括:配置成阵列中的多个基本天线,每个基本天线具有相关联的有源模块,多个DBF模块,每个DBF模块接收来自有源模块的微波信号,并传送代表有效模块的复数数字数据(I,Q) 输入信号; 并且DBF处理器意味着基于该复数数字数据准备加权和,该加权对应于限定天线的辐射图的窄波束的接收信道。 该系统还包括多个预过滤空间电路,每个预滤波空间电路接收来自有源模块的多个信号,并将相应的DBF模块传送给接收到的某些信号的幅度加权的信号 在输入端,每个DBF模块因此与子阵列相关联,因此形成的不同子阵列彼此相互重叠,并且选择加权,使得子阵列的图案是基本上只允许通过的扇区图案 来自限制空间的信号。 空间预滤波电路和DBF模块的数量小于基本天线的数量,并且处理器装置同时处理来自空间预滤波电路的输出信号,以便为天线的辐射图获得等效数量的同时 ,质量均匀的不同梁。
    • 3. 发明授权
    • Antenna with three-dimensional coverage and electronic scanning, of the
random spare volume array type
    • 天线具有三维覆盖和电子扫描,随机备用卷阵列型
    • US5038149A
    • 1991-08-06
    • US448981
    • 1989-12-12
    • Claude AubryJean-Louis PouraillyJoseph Roger
    • Claude AubryJean-Louis PouraillyJoseph Roger
    • H01Q21/20H01Q21/22
    • H01Q21/20H01Q21/22
    • An antenna of the random spare volume array type comprising a plurality of elementary antennas with almost omnidirectional individual radiation distributed according to a statistically isotropic random relationship of distribution within an enveloping volume having a shape generated by revolution, the mean spacing between elementary antennas being notably greater than a half wavelength of the minimum frequency to be received or transmitted, each elementary antenna being connected to an active module comprising individually controllable phase-shifters themselves connected to a common distributor. According to the disclosure, the elementary antennas are formed by dipoles oriented vertically and supplied by a supply line comprising a first section, extending horizontally between the respective dipole and a common vertical tower coaxial with the enveloping volume having a shape generated by revolution, and a second section extending to the interior of this tower and ending in the distributor. The antenna thus made has a vertical polarization which is advantageous in many examples of use (navy, secondary radars etc.) with, owing to the use of simple dipoles, a very small reflecting surface that makes it very difficult to localize. Furthermore, through this structure, the first sections of the supply lines may easily be self-supporting for the mechanical support of the dipoles on the common vertical tower formed, for example, by a ship's mast.
    • 随机备用体积阵列类型的天线包括具有几乎全向单独辐射的多个基本天线,根据在具有由旋转产生的形状的包络体积内的分布的统计学各向同性随机关系,基本天线之间的平均间隔明显更大 要接收或发送的最小频率的半波长,每个基本天线连接到有源模块,该有源模块包括本身连接到公共分配器的单独控制的移相器。 根据本公开,基本天线由垂直取向的偶极子形成,并由供给线供给,该供电线包括第一部分,该第一部分在相应偶极子之间水平延伸,以及与具有由旋转产生的形状的包络体同轴的公共垂直塔架, 第二部分延伸到塔的内部并以分配器结束。 这样制成的天线具有垂直极化,这在许多使用例子(海军,二次雷达等)中是有利的,由于使用简单的偶极子,使得非常难以定位的非常小的反射表面。 此外,通过这种结构,供应管线的第一部分可以容易地用于例如由船的桅杆形成的公共垂直塔上的偶极子的机械支撑的自支撑。