Patents by Inventor Ko-Han Lu

Ko-Han Lu 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).

  • Circularly polarized array antenna
    Patent number: 7271768
    Abstract: The invention relates to a circularly polarized array antenna for receiving and transmitting a circularly polarized signal. The circularly polarized array antenna comprises: a plurality of circularly polarized antennas with phase shift mechanism for receiving circularly polarized signals and transmitting the circularly polarized signals; a plurality of power lines which differ from each other in length and are coupled to the circularly polarized antennas respectively; and a power divider coupled to the power lines for receiving the circularly polarized signals. Wherein each of the circularly polarized antennas comprises a plurality of antenna elements and each comprises a microstrip antenna and a slot coupling apparatus.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: September 18, 2007
    Assignee: Tatung Co., Ltd.
    Inventors: The-Nan Chang, Ko-Han Lu
  • Circularly polarized array antenna
    Publication number: 20060132359
    Abstract: The invention relates to a circularly polarized array antenna for receiving and transmitting a circularly polarized signal. The circularly polarized array antenna comprises: a plurality of circularly polarized antennas with phase shift mechanism for receiving circularly polarized signals and transmitting the circularly polarized signals; a plurality of power lines which differ from each other in length and are coupled to the circularly polarized antennas respectively; and a power divider coupled to the power lines for receiving the circularly polarized signals. Wherein each of the circularly polarized antennas comprises a plurality of antenna elements and each comprises a microstrip antenna and a slot coupling apparatus.
    Type: Application
    Filed: September 20, 2005
    Publication date: June 22, 2006
    Applicant: TATUNG CO., LTD.
    Inventors: The-Nan Chang, Ko-Han Lu