Patents by Inventor Franklin Xiaotian Liu

Franklin Xiaotian Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Vehicle mounted satellite antenna system with in-motion tracking using beam forming
    Patent number: 7391381
    Abstract: 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.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: June 24, 2008
    Assignee: Motia
    Inventors: James June-Ming Wang, Chau Chin Yang, Franklin Xiaotian Liu, Youren Chen, Wenzhang Wang