Patents by Inventor James T. Cha

James T. Cha 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).

  • Power beaming system with printer circuit radiating elements having resonating cavities
    Patent number: 5218374
    Abstract: A system and method for "power beaming" energy from a source at high frequencies and rectifying such energy to provide a source of DC energy is disclosed. The system operates at a frequency of at least 10 GHz and incorporates a rectenna array having a plurality of rectenna structures that utilize circuit elements formed with microstrip circuit techniques. Each rectenna element is associated with a resonating cavity structure.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: June 8, 1993
    Assignee: APTI, Inc.
    Inventors: Peter Koert, James T. Cha
  • Power beaming system
    Patent number: 5068669
    Abstract: A system and method for power beaming energy from a source at high frequencies and rectifying such energy to provide a source of DC energy is disclosed. The system operates at a frequency of at least 10 GHz and incorporates a rectenna array having a plurality of rectenna structures that utilize circuit elements formed with microstrip circuit techniques.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: November 26, 1991
    Assignee: APTI, Inc.
    Inventors: Peter Koert, James T. Cha