Patents by Inventor Kwok-Kee Chan

Kwok-Kee Chan 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).

  • Wideband antenna with tapered surfaces
    Patent number: 6778145
    Abstract: An antenna array (10) comprises a plurality of antenna elements (20-32) creating a plurality of radio frequency waves. The central portion (185) of opposed edges of the waves are guided with conductive material. The waves are isolated from each other by non-conductive (cir or dielectric) spaces (189). The waves are guided by tapered surfaces (140, 141) having a predetermined thickness and emitted through a mouth having a mouth length (M). The ratio of the predetermined thickness to the mouth length is increased until there is no substantial increase in the high frequency limit of the array.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: August 17, 2004
    Assignee: Northrop Grumman Corporation
    Inventors: Brent T. Toland, Kwok-Kee Chan
  • Wideband antenna with tapered surfaces
    Publication number: 20040004580
    Abstract: An antenna array (10) comprises a plurality of antenna elements (20-32) creating a plurality of radio frequency waves. The central portion (185) of opposed edges of the waves are guided with conductive material. The waves are isolated from each other by non-conductive (cir or dielectric) spaces (189). The waves are guided by tapered surfaces (140, 141) having a predetermined thickness and emitted through a mouth having a mouth length (M). The ratio of the predetermined thickness to the mouth length is increased until there is no substantial increase in the high frequency limit of the array.
    Type: Application
    Filed: July 3, 2002
    Publication date: January 8, 2004
    Inventors: Brent T. Toland, Kwok-Kee Chan