Patents by Inventor Lingzhen Zeng

Lingzhen Zeng 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).

  • Smooth-walled feedhorn
    Patent number: 9373891
    Abstract: A device for at least one of receiving and transmitting electromagnetic radiation includes a feedhorn having a substantially smooth, electrically conducting inner surface extending from an open end to a feed end, the inner surface being substantially rotationally symmetrical about a longitudinal axis, wherein an orthogonal distance from a point on the longitudinal axis to the substantially smooth, electrically conducting inner surface increases monotonically as the point on the longitudinal axis is selected at successively greater distances from the feed end of the feedhorn towards the open end of the feedhorn such that a profile of the substantially smooth, electrically conducting inner surface of the feedhorn is monotonically increasing. The feedhorn has an operating bandwidth and the feedhorn provides a maximum of ?30 dB cross polarization response over at least 15% of the operating bandwidth.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: June 21, 2016
    Assignees: The Johns Hopkins University, The United States of America, As Represented by the Administration of the National Aeronautics and Space Administration
    Inventors: Charles L. Bennett, Lingzhen Zeng, Edward J. Wollack, David T. Chuss
  • SMOOTH-WALLED FEEDHORN
    Publication number: 20150349426
    Abstract: A device for at least one of receiving and transmitting electromagnetic radiation includes a feedhorn having a substantially smooth, electrically conducting inner surface extending from an open end to a feed end, the inner surface being substantially rotationally symmetrical about a longitudinal axis, wherein an orthogonal distance from a point on the longitudinal axis to the substantially smooth, electrically conducting inner surface increases monotonically as the point on the longitudinal axis is selected at successively greater distances from the feed end of the feedhorn towards the open end of the feedhorn such that a profile of the substantially smooth, electrically conducting inner surface of the feedhorn is monotonically increasing. The feedhorn has an operating bandwidth and the feedhorn provides a maximum of ?30 dB cross polarization response over at least 15% of the operating bandwidth.
    Type: Application
    Filed: August 6, 2015
    Publication date: December 3, 2015
    Inventors: Charles L Bennett, Lingzhen Zeng, Edward J. Wollack, David T. Chuss
  • Smooth-walled feedhorn
    Patent number: 9166297
    Abstract: A device for at least one of receiving and transmitting electromagnetic radiation includes a feedhorn having a substantially smooth, electrically conducting inner surface extending from an open end to a feed end, the inner surface being substantially rotationally symmetrical about a longitudinal axis, wherein an orthogonal distance from a point on the longitudinal axis to the substantially smooth, electrically conducting inner surface increases monotonically as the point on the longitudinal axis is selected at successively greater distances from the feed end of the feedhorn towards the open end of the feedhorn such that a profile of the substantially smooth, electrically conducting inner surface of the feedhorn is monotonically increasing. The feedhorn has an operating bandwidth and the feedhorn provides a maximum of ?30 dB cross polarization response over at least 15% of the operating bandwidth.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: October 20, 2015
    Assignee: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Charles L. Bennett, Lingzhen Zeng, Edward J. Wollack, David T. Chuss
  • SMOOTH-WALLED FEEDHORN
    Publication number: 20120154233
    Abstract: A device for at least one of receiving and transmitting electromagnetic radiation includes a feedhorn having a substantially smooth, electrically conducting inner surface extending from an open end to a feed end, the inner surface being substantially rotationally symmetrical about a longitudinal axis, wherein an orthogonal distance from a point on the longitudinal axis to the substantially smooth, electrically conducting inner surface increases monotonically as the point on the longitudinal axis is selected at successively greater distances from the feed end of the feedhorn towards the open end of the feedhorn such that a profile of the substantially smooth, electrically conducting inner surface of the feedhorn is monotonically increasing. The feedhorn has an operating bandwidth and the feedhorn provides a maximum of ?30 dB cross polarization response over at least 15% of the operating bandwidth.
    Type: Application
    Filed: October 8, 2010
    Publication date: June 21, 2012
    Applicants: THE JOHNS HOPKINS UNIVERSITY, AND SPACE ADMINISTRATION
    Inventors: Charles L. Bennett, Lingzhen Zeng, Edward J. Wollack, David T. Chuss