公开(公告)号：US07391381B2

公开(公告)日：2008-06-24

申请号：US10752794

申请日：2004-01-07

申请人： James June-Ming Wang ,  Chau Chin Yang ,  Franklin Xiaotian Liu ,  Youren Chen ,  Wenzhang Wang

发明人： James June-Ming Wang ,  Chau Chin Yang ,  Franklin Xiaotian Liu ,  Youren Chen ,  Wenzhang Wang

IPC分类号： H01Q1/32 ,  H01Q13/10

CPC分类号： G01S3/40 ,  G01S3/14 ,  G01S3/42 ,  H01Q1/3275 ,  H01Q3/04 ,  H01Q21/005

摘要： The present invention relates to a vehicle mountable satellite antenna as defined in the claims which is operable while the vehicle is in motion. The satellite antenna of the present invention can be installed on top of (or embedded into) the roof of a vehicle. The antenna is capable of providing high gain and a narrow antenna beam for aiming at a satellite direction and enabling broadband communication to vehicle. The present invention provides a vehicle mounted satellite antenna which has low axial ratio, high efficiency and has low grating lobes gain. The vehicle mounted satellite antenna of the present invention provides two simultaneous polarization states. In one embodiment, a hybrid mechanic and electronic steering approach provides a more reasonable cost and performance trade-off. The antenna aiming in the elevation direction is achieved via control of an electronic beamforming network. The antenna is mounted on a rotatable platform under mechanical steering and motion control for aiming the antenna in the azimuth direction. Such approach significantly reduces the complexity and increases the reliability of the mechanical design. The antenna height is compatible to the two-dimensional electronic steering phased-array antenna. Additionally, the number of the electronic processing elements required is considerably reduced from that of the conventional two-dimensional electronic steering phased-array antenna, thereby allowing for low cost and large volume commercial production. The present invention provides electronically generated left, right, up, and down beams for focusing the antenna beam toward the satellite while the vehicle is moving. All of the beams are simultaneously available for use in the motion beam tracking. This provides much faster response and less signal degradation.

摘要翻译： 本发明涉及一种如权利要求书所限定的可车载卫星天线，其可在车辆运动时操作。 本发明的卫星天线可以安装在车辆顶部（或嵌入）车顶。 天线能够提供高增益和窄天线波束，用于瞄准卫星方向并实现与车辆的宽带通信。 本发明提供一种具有低轴比，高效率并且具有低的光栅增益的车载卫星天线。 本发明的车载卫星天线提供两个同时的偏振状态。 在一个实施例中，混合机械和电子转向方法提供了更合理的成本和性能权衡。 通过电子波束成形网络的控制来实现朝向高度方向的天线。 天线安装在机械转向和运动控制下的可旋转平台上，用于将天线瞄准方位角方向。 这种方法显着降低了机械设计的复杂性并增加了其可靠性。 天线高度与二维电子转向相控阵天线兼容。 此外，所需的电子处理元件的数量比传统的二维电子转向相控阵天线的数量大大减少，从而允许低成本和大量的商业生产。 本发明提供电子产生的左，右，上，下光束，用于在车辆移动时将天线光束朝向卫星聚焦。 所有光束同时可用于运动光束跟踪。 这提供了更快的响应和更少的信号衰减。