Patents by Inventor Fa-Shian Chang

Fa-Shian 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).

  • Surface-mountable dual-band monopole antenna of WLAN application
    Patent number: 6720925
    Abstract: A surface-mountable dual-band monopole antenna includes a substrate and a folded radiative metallic patch with a small metallic lug. The folded radiative metallic patch encloses the substrate, and the small metallic lug protrudes from the substrate, wherein a feeding point is located on the small metallic lug for transmitting the signals.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: April 13, 2004
    Assignee: Accton Technology Corporation
    Inventors: Kin Lu Wong, Fa Shian Chang
  • Broadband circularly polarized patch antenna
    Patent number: 6606061
    Abstract: A broadband circularly polarized patch antenna is disclosed. The broadband circularly polarized patch antenna consists of: an L-shaped ground plane consisting of a vertical ground plane and a horizontal ground plane; a radiating metal patch; a probe feed placed coplanarly with the radiating metal patch and connected to the radiating metal patch through the vertical ground plane; and a substrate between the radiating metal patch and the horizontal ground plane. Because the probe feed of the broadband circularly polarized patch antenna of the present invention is placed coplanarly with the radiating metal patch, the required length of the probe feed is greatly reduced and the probe inductance effect on antenna's impedance matching is thus decreased, leading to enhanced circular polarization operating bandwidth. In addition, the broadband circularly polarized patch antenna of the present invention has the features of low cost, high antenna gain, good circular polarization radiation and simple structure.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: August 12, 2003
    Assignee: Accton Technology Corporation
    Inventors: Kin-Lu Wong, Fa-Shian Chang, Tsung-Wen Chiu
  • Surface-mountable dual-band monopole antenna for WLAN application
    Publication number: 20030132883
    Abstract: A surface-mountable dual-band monopole antenna includes a substrate and a folded radiative metallic patch with a small metallic lug. The folded radiative metallic patch encloses the substrate, and the small metallic lug protrudes from the substrate, wherein a feeding point is located on the small metallic lug for transmitting the signals.
    Type: Application
    Filed: May 9, 2002
    Publication date: July 17, 2003
    Applicant: Accton Technology Corporation
    Inventors: Kin Lu Wong, Fa Shian Chang
  • Broadband circularly polarized patch antenna
    Publication number: 20030063031
    Abstract: A broadband circularly polarized patch antenna is disclosed. The broadband circularly polarized patch antenna consists of: an L-shaped ground plane consisting of a vertical ground plane and a horizontal ground plane; a radiating metal patch; a probe feed placed coplanarly with the radiating metal patch and connected to the radiating metal patch through the vertical ground plane; and a substrate between the radiating metal patch and the horizontal ground plane. Because the probe feed of the broadband circularly polarized patch antenna of the present invention is placed coplanarly with the radiating metal patch, the required length of the probe feed is greatly reduced and the probe inductance effect on antenna's impedance matching is thus decreased, leading to enhanced circular polarization operating bandwidth. In addition, the broadband circularly polarized patch antenna of the present invention has the features of low cost, high antenna gain, good circular polarization radiation and simple structure.
    Type: Application
    Filed: November 20, 2001
    Publication date: April 3, 2003
    Inventors: Kin-Lu Wong, Fa-Shian Chang, Tsung-Wen Chiu