Antenna apparatus
    31.
    发明公开
    Antenna apparatus 失效
    天线装置

    公开(公告)号:EP0840140A1

    公开(公告)日:1998-05-06

    申请号:EP97119092.1

    申请日:1997-10-31

    IPC分类号: G01S13/93 H01Q3/20

    摘要: An antenna apparatus for use as in an automobile collision warning system has a primary radiator for radiating a high-frequency radio wave beam, a reflecting member for reflecting the radio wave beam, an actuating mechanism for actuating the reflecting member, and a lens such as a dielectric lens for converging the radio wave beam reflected by the reflecting member to reduce an angle of divergence of the radio wave beam.

    摘要翻译: 用于汽车碰撞报警系统的天线装置具有用于辐射高频无线电波束的主辐射器,用于反射无线电波束的反射构件,用于致动反射构件的致动机构以及诸如 介质透镜,用于会聚由反射部件反射的无线电波束,以减小无线电波束的发散角。

    Antenna
    32.
    发明公开
    Antenna 失效
    ANTENNE。

    公开(公告)号:EP0507440A1

    公开(公告)日:1992-10-07

    申请号:EP92301528.3

    申请日:1992-02-24

    IPC分类号: H01Q1/12 H01Q3/10 H01Q3/20

    CPC分类号: H01Q1/1257 H01Q3/10 H01Q3/20

    摘要: A satellite television receiver antenna for use on seaborne vessels comprise a Cassegrain antenna comprising a parabolic main reflector 1A, and a hyperbolic sub-reflector 1B mounted at an angle slightly opposite from the center axis of the parabolic reflector 1A, the sub-reflector being driven by a motor 30 to rotate so as to cause the antenna reception pattern to perform a conical scan around the main axis of the parabolic reflector 1A. The rotational speed is an even multiple of the frequency of any amplitude modulation of the received signal, or of any electrical interference, and the received signal is measured at points rotationally spaced apart 180 degrees, so that the effects of modulation and/or electrical interference are cancelled. The measured signal strength at four positions spaced rotationally by 90° is used to derive power signals to drive pulse width modulation control azimith and elevation motors 46A, 46B.

    摘要翻译: 用于海运船只的卫星电视接收机天线包括卡赛格兰天线,其包括抛物面主反射器1A和安装成与抛物面反射器1A的中心轴线稍微相反的角度的双曲面子反射器1B,副反射器被驱动 通过马达30旋转以使天线接收图案围绕抛物面反射器1A的主轴进行圆锥扫描。 旋转速度是接收信号的任何幅度调制或任何电干扰的频率的偶数倍,并且在旋转间隔180度的点处测量接收信号,使得调制和/或电干扰的影响 被取消。 用旋转方向旋转90度的四个位置处的测量信号强度用于导出功率信号以驱动脉宽调制控制方位角和仰角马达46A,46B。

    Fine pointing system of a reflector type focussing antenna
    33.
    发明公开
    Fine pointing system of a reflector type focussing antenna 失效
    用于反射器类型天线的精细点标系统

    公开(公告)号:EP0449158A3

    公开(公告)日:1992-01-08

    申请号:EP91104612.6

    申请日:1991-03-24

    IPC分类号: H01Q1/12 H01Q3/20

    CPC分类号: H01Q3/20 H01Q1/125

    摘要: System for fine pointing of reflector antennae, particularly suitable for space applications where such reflector (Figure 1) is moved within a spherical surface secor (5) with focus in the centre (F). Thus the beam can be pointed in the required direction and it ensures permanence in the focus, There are no defocussing losses even with a fixed feed system. The system proposed achieves the required scan with low losses. The feed beam at any rate covers a large part of the reflector surface (1), cosidering the usual edge taper values of the reflector of the order of 5 - 15 dB, i.e. the amplitude tapering due to the feed primary diagram, to the reflector edge and bearing in mind the range attenuation. The feed (2) and related feed lines either in waveguide (10) or coaxial cable, are fixed and firm. This solves the feasibility problems which are often unsurmountable, required to reduce possible RF losses of articulated lines, also avoiding undesired modulation effects induced onto the signals. The system is essentially made up of the following (Figure 2):
    A cardanic joint (3) (4);
    pressure spring(s);
    two actuation motors (7), equipped with position stops;
    two capstans (13) to widn and unwind piloting wires;
    two piloting wires (6).

    Antenne plate à balayage mécanique rapide
    34.
    发明公开
    Antenne plate à balayage mécanique rapide 失效
    Flache Antenne mit schneller机械师Abtastung。

    公开(公告)号:EP0161127A1

    公开(公告)日:1985-11-13

    申请号:EP85400517.0

    申请日:1985-03-18

    申请人: THOMSON-CSF

    IPC分类号: H01Q3/20

    CPC分类号: H01Q3/20

    摘要: Antenne plate dans laquelle l'émission se fait entre plans parallèles (3 et 4) vers un réseau dispersif d'émission (8) par l'intermédiaire d'un miroir (6). Le balayage en site est obtenu par variations de fréquences. Le balayage en gisement est obtenu par rotation d'un miroir (6) autour d'un axe (9). Elle peut être utilisée comme antenne radar anti-mortier.

    摘要翻译: 1.平面天线,其允许机械扫描并且包括适于将发散光束(10)发射到准直装置(2)的发射源(1),所述准直装置(2)传输具有预定线性偏振方向的准直光束(11) )到由辐射方向取决于传输频率的色散线性网络(80)构成的传输网络(8),所述天线还包括: - 两个平面和平行引导装置(3,4),其布置在 准直光束(11)的任一侧平行于光束的线性偏振(E)的方向并且限定用于光束的引导介质(5); 以及 - 设置在所述两个平面引导装置(3和4)之间的可调节的反射装置(6),所述反射装置是平面镜(6),其反射平面(7)垂直于所述引导装置(3)的平面 ,4); 其特征在于,所述反射镜的高度(h)低于分离所述两个导板(3,4)的距离(d),使得所述反射镜(6)与所述导向板(3,4)之间不产生摩擦 ); 并且在该过渡装置(14,图7)中被提供并放置在反射镜(6)和传输网络(8)之间并且包括具有相等电长度的微波引导件(14),其适于确保反射镜 6)和传输网络(8)保持不变。

    Système d'antenne à balayage conique pour radar de poursuite
    35.
    发明公开
    Système d'antenne à balayage conique pour radar de poursuite 失效
    天线与圆锥扫描雷达的跟踪。

    公开(公告)号:EP0002982A1

    公开(公告)日:1979-07-11

    申请号:EP78400242.0

    申请日:1978-12-15

    申请人: THOMSON-CSF

    IPC分类号: H01Q19/18 H01Q3/20

    摘要: Système d'antenne à balayage conique à la réception du type Cassegrain comportant un réflecteur principal parabolique (1) et deux réflecteurs auxiliaires hyperboliques (3, 4) avec un foyer de l'un dans un plan focal de l'autre.
    L'un de ces réflecteurs (3) est semi-transparent et l'autre (4) est animé d'un mouvement de rotation autour d'un axe (54) incliné par rapport à l'axe focal (ox) du système. Application aux radars de poursuite.

    Method of reducing phase abberation in an antenna system with array feed

    公开(公告)号:EP3032765B1

    公开(公告)日:2018-10-31

    申请号:EP14307009.2

    申请日:2014-12-12

    申请人: Eutelsat S.A.

    摘要: The invention relates to a method for reducing phase aberration in an antenna system for satellite, the antenna system being configured to receive and/or emit at least a spot beam, the antenna system comprising: - A reflector (2); - An array feed (1) comprising a plurality of feeds configured to illuminate the reflector (2) in emission mode and/or configured to receive illumination from the reflector in reception mode; - A trimming system (3) configured to adjust the position of the reflector (2) with respect to the array feed (1); the method comprising a step of adjusting the position of the reflector with respect to the array feed in order to correct phase aberration in the spot beam.