Patents by Inventor Richard E. Twogood

Richard E. Twogood 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).

  • Broad band half Vivaldi antennas and feed methods
    Patent number: 10276946
    Abstract: A single Vivaldi antenna plate (half Vivaldi antenna) over a ground plane can be used to achieve a 50-ohm impedance, or two or more single plates over a ground plane to achieve other impedances. Unbalanced 50-ohm transmission lines, e.g., coaxial cables, can be used to directly feed the antenna.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 30, 2019
    Assignees: Lawrence Livermore National Security, LLC, Dirac Solutions, inc.
    Inventors: David M. Benzel, Richard E. Twogood
  • BROAD BAND HALF VIVALDI ANTENNAS AND FEED METHODS
    Publication number: 20170207546
    Abstract: A single Vivaldi antenna plate (half Vivaldi antenna) over a ground plane can be used to achieve a 50-ohm impedance, or two or more single plates over a ground plane to achieve other impedances. Unbalanced 50-ohm transmission lines, e.g., coaxial cables, can be used to directly feed the antenna.
    Type: Application
    Filed: March 31, 2017
    Publication date: July 20, 2017
    Applicant: Lawrence Livermore National Security, LLC.
    Inventors: David M. Benzel, Richard E. Twogood
  • Broad band antennas and feed methods
    Patent number: 9627777
    Abstract: Two or more Vivaldi antennas, consisting of two plates each, each with the antenna's natural impedance of approximately 100 ohms, are placed in parallel to achieve a 50 ohm impedance in the case of two antennas or other impedances (100/n ohms) for more than two antennas. A single Vivaldi antenna plate (half Vivaldi antenna) over a ground plane can also be used to achieve a 50 ohm impedance, or two or more single plates over a ground plane to achieve other impedances. Unbalanced 50 ohm transmission lines, e.g. coaxial cables, can be used to directly feed, the dual Vivaldi (four plate) antenna in a center fed angled center departure, or more desirably, a center fed offset departure configuration.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: April 18, 2017
    Assignees: Lawrence Livermore National Security, LLC, Dirac Solutions, Inc.
    Inventors: David M. Benzel, Richard E. Twogood
  • LONG-RANGE UWB REMOTE POWERING CAPABILITY AT FCC REGULATED LIMIT USING MULTIPLE ANTENNAS
    Publication number: 20160048710
    Abstract: A method and apparatus for remote UWB powering of passive RFID tags, sensors, and other electronic devices at long ranges and still at FCC low emission power limits utilizes a distributed multi-transmitter system configured for spotforming. The UWB powering signal is different from the signal that is used for communication between the tag and its reader. By de-coupling the powering task from the communication task, one is able to increase the range of communication between the tag and the reader, as readers can be designed to have excellent receiver sensitivities, while powering range is increased by use of multiple “spot-forming” antennas over a large area.
    Type: Application
    Filed: July 14, 2014
    Publication date: February 18, 2016
    Applicant: Lawrence Livermore National Security, LLC
    Inventors: Faranak Nekoogar, Farid U. Dowla, David M. Benzel, Richard E. Twogood
  • Broad Band Antennas and Feed Methods
    Publication number: 20130038495
    Abstract: Two or more Vivaldi antennas, consisting of two plates each, each with the antenna's natural impedance of approximately 100 ohms, are placed in parallel to achieve a 50 ohm impedance in the case of two antennas or other impedances (100/n ohms) for more than two antennas. A single Vivaldi antenna plate (half Vivaldi antenna) over a ground plane can also be used to achieve a 50 ohm impedance, or two or more single plates over a ground plane to achieve other impedances. Unbalanced 50 ohm transmission lines, e.g. coaxial cables, can be used to directly feed, the dual Vivaldi (four plate) antenna in a center fed angled center departure, or more desirably, a center fed offset departure configuration.
    Type: Application
    Filed: August 10, 2012
    Publication date: February 14, 2013
    Applicant: Lawrence Livermore National Security, LLC.
    Inventors: David M. Benzel, Richard E. Twogood