Patents by Inventor Hans Steyskal

Hans Steyskal 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).

  • Simultaneous transmit and receive antenna system
    Patent number: 8749441
    Abstract: Described is a simultaneous transmit and receive antenna system having a ring array of transmit antenna elements and a receive antenna element disposed on an axis that is perpendicular to and passing through the center of the ring array. Alternatively, the ring array includes receive elements and a transmit antenna element is disposed on the axis perpendicular to the ring array. Opposite antenna elements in the ring array differ in phase by 180° so that a radiation pattern null occurs at the antenna element at the center of the ring array. Also included are at least one ground plane and an electrically-conductive cylinder disposed on the perpendicular axis inside the ring array to provide a high degree of isolation between the transmit and receive antenna elements. The system may be configured for wireless communications, for example, according to WIFI IEEE standard 802.11 or WIMAX IEEE standard 802.16.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: June 10, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: Alan J. Fenn, Peter T. Hurst, Jeffrey S. Herd, Kenneth E. Kolodziej, Leonard I. Parad, Hans Steyskal
  • SIMULTANEOUS TRANSMIT AND RECEIVE ANTENNA SYSTEM
    Publication number: 20130106667
    Abstract: Described is a simultaneous transmit and receive antenna system having a ring array of transmit antenna elements and a receive antenna element disposed on an axis that is perpendicular to and passing through the center of the ring array. Alternatively, the ring array includes receive elements and a transmit antenna element is disposed on the axis perpendicular to the ring array. Opposite antenna elements in the ring array differ in phase by 180° so that a radiation pattern null occurs at the antenna element at the center of the ring array. Also included are at least one ground plane and an electrically-conductive cylinder disposed on the perpendicular axis inside the ring array to provide a high degree of isolation between the transmit and receive antenna elements. The system may be configured for wireless communications, for example, according to WIFI IEEE standard 802.11 or WIMAX IEEE standard 802.16.
    Type: Application
    Filed: October 27, 2011
    Publication date: May 2, 2013
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Alan J. Fenn, Peter T. Hurst, Jeffrey S. Herd, Kenneth E. Kolodziej, Leonard I. Parad, Hans Steyskal
  • Reconfigurable microstrip antenna array geometry which utilizes micro-electro-mechanical system (MEMS) switches
    Patent number: 6198438
    Abstract: A reconfigurable microstrip antenna array geometry which utilizes Micro-Electro-Mechanical System (MEMS) switches to electrically connect groups of printed patch radiators for operation at multiple frequencies.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: March 6, 2001
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Jeffrey S. Herd, Marat Davidovitz, Hans Steyskal