Patents by Inventor Jian-Ping Chang

Jian-Ping Chang 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).

  • Miniature planar notch antenna using microstrip feed line
    Patent number: 7132991
    Abstract: A miniature antenna for various wireless communication applications in the ISM band around 2.45 GHz is provided. The miniature antenna mainly contains a bended planar notch antenna with a metallic stub as a capacitive load. A microstrip feed line is also appropriately bended so as to achieve a significant reduction of the antenna's dimension. The miniature antenna could be implemented using simple manufacturing processes on a common circuit board without mechanical work or advanced processes such as low temperature co-fired ceramics. The antenna has a comparable performance to those antennas having much larger dimensions.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: November 7, 2006
    Assignee: Tamkang University
    Inventors: Ching-Lieh Li, Jian-Ping Chang
  • MINIATURE PLANAR NOTCH ANTENNA USING MICROSTRIP FEED LINE
    Publication number: 20060232476
    Abstract: A miniature antenna for various wireless communication applications in the ISM band around 2.45 GHz is provided. The miniature antenna mainly contains a bended planar notch antenna with a metallic stub as a capacitive load. A microstrip feed line is also appropriately bended so as to achieve a significant reduction of the antenna's dimension. The miniature antenna could be implemented using simple manufacturing processes on a common circuit board without mechanical work or advanced processes such as low temperature co-fired ceramics. The antenna has a comparable performance to those antennas having much larger dimensions.
    Type: Application
    Filed: April 15, 2005
    Publication date: October 19, 2006
    Inventors: Ching-Lieh Li, Jian-Ping Chang