Patents by Inventor Andreas-Albertos Agius

Andreas-Albertos Agius 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).

  • Adaptive multifilar antenna
    Patent number: 7034773
    Abstract: A multifilar antenna (200) comprises n spaced antenna filaments, where n is on integer greater than 1; a matching circuit (210) for matching the characteristic impedance of the antenna to that of a transmitting and/or receiving apparatus; a weighting circuit (240) for applying respective gain and phase adjustments to signals passed to or from the n filaments; switch means (310) associated with each filament for selectively altering the electrical length and/or interconnections of the filaments; means for detecting electrical properties of the multifilar antenna with respect to the frequency, polarisation and/or direction of propagation of a signal to be received or transmitted by the multifilar antenna and/or impedance matching of the antenna; and control means (230), responsive to the detective means, for controlling the operation of the matching circuit (210), the weighting circuit (240) and the switch means (310) to adjust the properties of the multifilar antenna (200) to suit better a current signal to be
    Type: Grant
    Filed: February 15, 1999
    Date of Patent: April 25, 2006
    Assignee: University of Surrey
    Inventors: Simon Reza Saunders, Andreas-Albertos Agius
  • Adaptive multifilar antenna
    Patent number: 6891516
    Abstract: A multifilar antenna comprises n spaced antenna filaments, where n is an integer greater than 1; a matching circuit for matching the characteristic impedance of the antenna to that of a transmitting and/or receiving apparatus; a weighting circuit for applying gain and phase adjustments to signals passed to or from the n filaments; switch means associated with at least some of the filaments for selectively altering the electrical length and/or interconnections for the filaments; means for detecting electrical properties of the multifilar antenna with respect to the frequency, polarization and/or direction of propagation of a signal to be received or transmitted by the multifilar antenna and/or impedance matching of the antenna; and control means, responsive to the detecting means, for controlling the operation of the matching circuit, the weighting circuit and the switch means to adjust the properties of the multifilar antenna to suit better a current signal to be received or transmitted.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: May 10, 2005
    Assignee: University of Surrey
    Inventors: Simon Reza Saunders, Andreas-Albertos Agius, Stephen Leach