公开(公告)号：US4462034A

公开(公告)日：1984-07-24

申请号：US296024

申请日：1981-08-25

申请人： Shinichi Betsudan ,  Katsuhiko Aoki ,  Shigeru Sato ,  Takashi Katagi

发明人： Shinichi Betsudan ,  Katsuhiko Aoki ,  Shigeru Sato ,  Takashi Katagi

IPC分类号： H01P3/20 ,  H01Q3/24 ,  H01Q5/00 ,  H01Q15/23 ,  H01Q19/17 ,  H01Q19/18 ,  H01Q19/19 ,  H01Q21/28

CPC分类号： H01Q19/191 ,  H01Q19/17 ,  H01Q19/18 ,  H01Q19/19 ,  H01Q3/245 ,  H01Q5/45

摘要： An antenna system having a main reflector, a sub-reflector, and a plurality of horns for radiating different frequencies includes a beam waveguide system which cancels cross polarization otherwise inherent in the system. If the antenna system uses a non-rotationally-symmetric sub-reflector the cross polarization caused thereby is cancelled by the beam waveguide system having at least two focusing reflectors and selected parameters. Alternatively the beam waveguide system can be used with a rotationally symmetric and stationary sub-reflector by being positioned to reflect said beam on the axis of the main reflector. Either the horns or the focusing reflectors may be rotatably switched, the other group being stationary.

摘要翻译： 具有用于辐射不同频率的主反射器，副反射器和多个喇叭的天线系统包括抵消系统中另外固有的交叉极化的波束波导系统。 如果天线系统使用非旋转对称子反射器，则由具有至少两个聚焦反射器和选定参数的光束波导系统抵消由此引起的交叉极化。 或者，波束波导系统可以与旋转对称和固定的子反射器一起使用，其被定位成将所述光束反射在主反射器的轴线上。 喇叭或聚焦反射器可以可旋转地切换，另一组是静止的。

公开(公告)号：US4356494A

公开(公告)日：1982-10-26

申请号：US227902

申请日：1981-01-23

申请人： Takashi Katagi ,  Shuji Urasaki ,  Takashi Ebisui ,  Katsuhiko Aoki

发明人： Takashi Katagi ,  Shuji Urasaki ,  Takashi Ebisui ,  Katsuhiko Aoki

IPC分类号： H01Q19/18 ,  H01Q19/19

CPC分类号： H01Q19/19

摘要： An earth station antenna is employed for telecommunicating with a satellite in combination with an automatic tracking apparatus. The antenna is a dual reflector antenna which comprises a main reflector, a sub-reflector and a primary radiator, and the used frequency band of the antenna is at least 1.8 octaves. A parameter t of the antenna, defined by a configuration of the primary radiator is less than 0.3 at the lowest operating frequency. The phase center of the primary radiator, at a low frequency within the operating frequency range, is made to correspond with the focus of the sub-reflector.The above parameter t is defined by: ##EQU1## where: .lambda.: wavelength in free space,D.sub.h : aperture diameter of the primary radiator,L.sub.h : center axial length from the radiator apex to the radiator aperture plane, andL.sub.s : length from the radiator aperture plane to the bottom surface of the sub-reflector.

摘要翻译： 采用地球站天线与卫星进行通信，结合自动跟踪装置。 该天线是双反射器天线，其包括主反射器，副反射器和主辐射器，天线的使用频带为至少1.8倍。 在最低工作频率下，由主辐射器的配置限定的天线的参数t小于0.3。 初级辐射器在工作频率范围内的低频的相位中心与副反射器的焦点相对应。 上述参数t由下式定义：其中：λ：自由空间中的波长，Dh：主辐射器的孔径，Lh：从散热器顶点到散热器孔径平面的中心轴向长度，Ls：来自 散热器孔径平面到底部反射器的底面。