Patents by Inventor Kenneth P Stewart

Kenneth P Stewart 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).

  • Wide-band active antenna system for HF/VHF radio reception
    Patent number: 9225074
    Abstract: An active antenna system for receiving electromagnetic radiation at frequencies below 100 MHz. The system includes a vertical support mast; a front end electronics unit including an active balun, the front end electronics unit affixed to the support mast; two crossed-dipole antennas affixed oriented at about 90 degrees to each other, each crossed-dipole antenna having two arms formed of electrically conductive material, each arm having an isoceles triangular frame with an apex of the frame electrically connected to a feedpoint of the front end electronics unit, each arm also having a longitudinal member extending from the apex to the center of the base of the triangular shape and a cross member extending between sides of the triangular frame. The system can operate independently or as part of a long wavelength array for astronomical radio telescope applications.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: December 29, 2015
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Brian C. Hicks, Kenneth P. Stewart, Tracy Clarke, Nagini P. Dalal, Henrique Schmitt, Paul S. Ray, Stephen J. Burns, Namir E. Kassim, Emil J. Polisensky, Norman R. Mcglothlin, Jr.
  • Wide-Band Active Antenna System for HF/VHF radio
    Publication number: 20140184463
    Abstract: An active antenna system for receiving electromagnetic radiation at frequencies below 100 MHz. The system includes a vertical support mast; a front end electronics unit including an active balun, the front end electronics unit affixed to the support mast; two crossed-dipole antennas affixed oriented at about 90 degrees to each other, each crossed-dipole antenna having two arms formed of electrically conductive material, each arm having an isoceles triangular frame with an apex of the frame electrically connected to a feedpoint of the front end electronics unit, each arm also having a longitudinal member extending from the apex to the center of the base of the triangular shape and a cross member extending between sides of the triangular frame. The system can operate independently or as part of a long wavelength array for astronomical radio telescope applications.
    Type: Application
    Filed: November 5, 2013
    Publication date: July 3, 2014
    Applicant: The Government of the US, as represented by the Secretary of the Navy
    Inventors: Brian C. Hicks, Kenneth P. Stewart, Tracy Clarke, Nagini P. Dalal, Henrique Schmitt, Paul S. Ray, Stephen J. Burns, Namir E. Kassim, Emil J. Polisensky, Norman R. McGlothlin, JR.
  • Non-periodic wavefront dividing interferometer
    Patent number: 8081318
    Abstract: A non-periodic reflection beamsplitter or reflector for use in an interferometer. The interferometer employs non-periodic reflectors or a non-periodic beamsplitter in order to produce interference patterns to analyze. The non-periodic reflectors or beamsplitters may be concentrically arranged reflectors having equal area. The beamsplitter consists of two adjacent non-periodic structures having complementary reflection and transmission patterns.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: December 20, 2011
    Assignees: The United States of America as represented by the Secretary of the Navy, New Jersey Institute of Technology
    Inventors: Oren Sternberg, Kenneth P Stewart, Brian C Hicks, Haim Grebel, Karl Dieter Moeller
  • NON-PERIODIC WAVEFRONT DIVIDING INTERFEROMETER
    Publication number: 20100315648
    Abstract: A non-periodic reflection beamsplitter or reflector for use in an interferometer. The interferometer employs non-periodic reflectors or a non-periodic beamsplitter in order to produce interference patterns to analyze. The non-periodic reflectors or beamsplitters may be concentrically arranged reflectors having equal area. The beamsplitter consists of two adjacent non-periodic structures having complementary reflection and transmission patterns.
    Type: Application
    Filed: June 10, 2009
    Publication date: December 16, 2010
    Inventors: Oren Sternberg, Kenneth P. Stewart, Brian C. Hicks, Haim Grebel, Karl Dieter Moeller