Patents by Inventor Teodoro Azzarelli

Teodoro Azzarelli 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).

  • Antenna data compression using multi-dipole antenna
    Patent number: 6437737
    Abstract: Data compression method, system, and program code for compressing antenna pattern data generated by measuring the complex voltage derived from the interaction of a RF waveform and a sensing element are disclosed. The antenna pattern data are modeled with a plurality of infinitesimal antenna elements, each element defined in terms of a distinct position, orientation, and polarization. An analytical expression for the interaction between the plurality of infinitesimal antenna elements and an impinging waveform yields a plurality of expressions for a theoretical voltage. The plurality of infinitesimal antenna elements constitute a mathematical basis set from which a weighted linear combination is constructed. The value of the weights are determined by equating the complex voltage representing the antenna pattern data with the theoretical voltage representing the plurality of weighted infinitesimal antenna elements.
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: August 20, 2002
    Assignee: Science and Applied Technology, Inc.
    Inventors: Teodoro Azzarelli, Paul Kwon
  • AOA estimation and polarization induced phase correction using a conformal array of titled antenna elements
    Patent number: 6195043
    Abstract: An apparatus and method for determining the angles-of-arrival and the polarization states of incoming RF signals of unknown polarization using five or more RF sensing antenna elements of differing yet known orientations of polarization.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: February 27, 2001
    Assignee: Science and Applied Technology, Inc.
    Inventors: Teodoro Azzarelli, Paul Kwon, Ephraim Mendelovicz
  • Ambiguity removal and angles-of-arrival estimation for radially polarized conformal arrays
    Patent number: 6140963
    Abstract: A method for resolving the angular ambiguity inherent in the differential phase measurements of a source of electromagnetic signal by an interferometric system of antenna elements. Three or more independent differential phase measurements are acquired between predetermined pairs of antenna elements. The ambiguous solutions to each of the differential phase measurements are represented as a group of equally-spaced, parallel lines. The points of intersection between two groups of lines represent ambiguous solutions to the system of equations from which the true angles-of-arrival may be determined. The set of ambiguous solutions is evaluated using the remaining differential phase measurements. The most probable solution to the system of equations is determined by minimizing cost functions with the following embodiments: tightest cluster of intersecting lines; maximum likelihood estimation; and voltage reconstruction comparisons with measured voltages.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: October 31, 2000
    Assignee: Science and Applied Technology, Inc.
    Inventors: Teodoro Azzarelli, Paul Kwon, Ephraim Mendelovicz
  • Apparatus and method for determining angles-of-arrival and polarization of incoming RF signals
    Patent number: 5936575
    Abstract: An apparatus and method for determining the angles-of-arrival and the polarization states of incoming RF signals of unknown polarization using three or more RF sensing antenna elements of differing yet known orientations of polarization.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: August 10, 1999
    Assignee: Science and Applied Technology, Inc.
    Inventors: Teodoro Azzarelli, Ephraim Mendelovicz