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    Radar system for detecting low-flying objects
    1.
    发明授权
    Radar system for detecting low-flying objects 失效
    用于检测低飞物体的雷达系统

    公开(公告)号：US3906495A

    公开(公告)日：1975-09-16

    申请号：US32655173

    申请日：1973-01-24

    Applicant: THOMSON CSF

    Inventor： ROGER JOSEPH

    IPC: G01S1/02 ,  G01S13/44 ,  G01S19/25 ,  G01S9/22

    CPC classification number: G01S13/4409 ,  G01S1/02

    Abstract: A transceiver of a radar station is linked with an antenna, including two vertically spaced radiators, via two branch paths merging into a sum channel and a difference channel for passing microwave energy from the transceiver to the radiators, or vice versa, in additive and subtractive phase relationship. By alternately blocking these channels during transmission and/or reception, or by introducing a phase shift into one or both branch paths, it is possible to determine which mode of operation delivers a signal of maximum strength from a detected target in one of the channels. In some instances, periodic switchover or phase reversal during surveillance automatically leads to the selection of the more active channels or the more favorable phasing as soon as an echo signal is detected; in another embodiment, in which the two branch paths include a pair of cascaded 3-db couplers common to both channels, the phase is progressively readjusted in response to an echo signal in the difference channel to maximize the output of the sum channel.

    Abstract translation: 雷达站的收发器与包括两个垂直间隔的辐射器的天线通过两个分支路径相连，这两个分支路径合并到和信道中，以及用于将微波能量从收发器传递到散热器的差分通道，反之亦然，以加法和减法 相位关系。 通过在发送和/或接收期间交替地阻挡这些信道，或者通过将相移引入一个或两个分支路径，可以确定哪个操作模式在一个信道中从检测到的目标传送最大强度的信号。 在某些情况下，一旦检测到回波信号，监视期间的周期性切换或相位反转自动导致选择更有效的通道或更有利的定相; 在另一个实施例中，其中两个分支路径包括两个通道共同的一对级联的3-db耦合器，响应于差分通道中的回波信号逐渐重新调整该相位，以使和通道的输出最大化。

    5.
    发明专利
    未知

    公开(公告)号：DE69013998T2

    公开(公告)日：1995-03-16

    申请号：DE69013998

    申请日：1990-06-22

    Applicant: THOMSON CSF

    Inventor： COPPIER HERVE ,  POURAILLY JEAN-LOUIS ,  ROGER JOSEPH

    IPC: G01R29/08 ,  H01Q9/04 ,  H01Q13/22

    Abstract: A pick-up for electromagnetic energy radiation guided between at least two parallel ground plates includes a plane conductive tongue positioned between the two ground plates in a plane parallel to these plates and pointed in the direction of propagation of the guided electromagnetic energy, and obstacles interposed between the ground plates and the tongue converting the electromagnetic energy guided between the two ground plates, propagated in transverse electromagnetic mode, into an electromagnetic energy that is propagated in transverse asymmetrical electromagnetic mode in a strip line structure formed by the tongue and the two ground plates.

    6.
    发明专利
    未知

    公开(公告)号：DE69012238D1

    公开(公告)日：1994-10-13

    申请号：DE69012238

    申请日：1990-06-15

    Applicant: THOMSON CSF

    Inventor： POURAILLY JEAN-LOUIS ,  ROGER JOSEPH

    IPC: H01Q3/26 ,  H01Q21/00 ,  H01Q23/00 ,  H01Q25/00

    Abstract: 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.

    7.
    发明专利
    未知

    公开(公告)号：FR2649544A1

    公开(公告)日：1991-01-11

    申请号：FR8908960

    申请日：1989-07-04

    Applicant: THOMSON CSF

    Inventor： POURAILLY JEAN-LOUIS ,  ROGER JOSEPH

    IPC: H01Q3/26 ,  H01Q21/00 ,  H01Q23/00 ,  H01Q25/00

    Abstract: 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.

    8.
    发明专利
    未知

    公开(公告)号：FR2649543A1

    公开(公告)日：1991-01-11

    申请号：FR8909174

    申请日：1989-07-07

    Applicant: THOMSON CSF

    Inventor： COPPIER HERVE ,  POURAILLY JEAN-LOUIS ,  ROGER JOSEPH

    IPC: H01Q3/40 ,  H01P5/04 ,  H01P5/12 ,  H01Q13/12 ,  H01Q17/00

    Abstract: This distributor relates to radar antennas. It is used notably for making multiple-beam antennas. It is of the optical Blass matrix type. It has a horn-shaped guide with two energy leading-in central strips that radiate directly in space by means of excitation obstacles which are cylindrical studs arranged in pairs on the inner surfaces of the side walls to obtain the desired directivity. By means of this distributor, it is possible to simultaneously achieve sum and difference patterns or again different directions of aim.

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