Patents by Inventor Eugene C. Ngai

Eugene C. Ngai 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).

  • Tunable multi-band antenna array
    Patent number: 6795021
    Abstract: An antenna element is provided having a stacked patch configuration and having tuning structures by which the antenna element can be tuned at two different frequencies of operation. A plurality of the antenna elements can be combined to provide an antenna array. The antenna array can be provided having one or more surface wave surface wave control structures that isolate respective ones of the antenna elements from other respective ones of the antenna elements. The antenna element and/or the antenna array can be provided having RF feeds that can generate any pre-determined polarization.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: September 21, 2004
    Assignee: Massachusetts Institute of Technology
    Inventors: Eugene C. Ngai, Paul A. Theophelakes, Richard J. Cotillo, Dennis J. Blejer
  • TUNABLE MULTI-BAND ANTENNA ARRAY
    Publication number: 20030164797
    Abstract: An antenna element is provided having a stacked patch configuration and having tuning structures by which the antenna element can be tuned at two different frequencies of operation. A plurality of the antenna elements can be combined to provide an antenna array. The antenna array can be provided having one or more surface wave surface wave control structures that isolate respective ones of the antenna elements from other respective ones of the antenna elements. The antenna element and/or the antenna array can be provided having RF feeds that can generate any pre-determined polarization.
    Type: Application
    Filed: March 1, 2002
    Publication date: September 4, 2003
    Inventors: Eugene C. Ngai, Paul A. Theophelakes, Richard J. Cotillo, Dennis J. Blejer
  • M&A for performing near field measurements on a dish antenna and for utilizing said measurements to realign dish panels
    Patent number: 5119105
    Abstract: A method and apparatus are provided performing near-field measurements on dish antenna, in particular large dish antenna, and for utilizing these measurements to realign dish panels. The antenna is tiltable about a pivot point on a mounting pedestal to any desired elevation angle. A substantially circular track is provided which is centered at and spaced a predetermined distance from the pivot point, the track preferably being adjustably mounted to a stiff circular arch. The antenna is rotatable in the azimuth direction, preferably by rotating the pedestal, and a scanning probe is provided which is mounted for control traversal on the circular track. The probe is utilized to perform near-field measurements on the antenna at selected azimuthal positions of the antenna and selected positions of the probe on the track. The probe may also be rotatable to at least two different polarizations.
    Type: Grant
    Filed: March 29, 1991
    Date of Patent: June 2, 1992
    Assignee: Electronic Space Systems Corporation
    Inventors: Eugene C. Ngai, Carlo J. Mistretta, Luther E. Rhoades, Joseph B. Sangiolo, Reuven Shavit