Patents by Inventor Frédéric Devillers

Frédéric Devillers 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).

  • Multi-band printed dipole antenna
    Patent number: 7432873
    Abstract: The invention relates to a printed antenna comprising a dielectric substrate (CS1, CS2) supporting feeder lines (LA1, LA2) and first and second T-shaped dipoles (D1, D2) of different sizes for dual-band operation. Each dipole includes a stem (J1, J2) and two radiating arms (B1, B2) separated by a coupling slot (FC1, FC2) made in the stem. For compactness of the antenna, the stems are partly superimposed, the coupling slots are aligned and a decoupling cut-out (ED) is made in the second dipole so as to uncover the coupling slot of the first dipole, by virtue of their superposition. The substrate can comprise one, two or three layers. Plural antennas can constitute an antenna network used as a base element in one-dimensional or two-dimensional network.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: October 7, 2008
    Assignee: France Telecom
    Inventors: Patrice Brachat, Philippe Ratajczak, Frédéric Devillers
  • Multi-band printed dipole antenna
    Publication number: 20080030418
    Abstract: The invention relates to a printed antenna comprising a dielectric substrate (CS1, CS2) supporting feeder lines (LA1, LA2) and first and second T-shaped dipoles (D1, D2) of different sizes for dual-band operation. Each dipole includes a stem (J1, J2) and two radiating arms (B1, B2) separated by a coupling slot (FC1, FC2) made in the stem. For compactness of the antenna, the stems are partly superimposed, the coupling slots are aligned and a decoupling cut-out (ED) is made in the second dipole so as to uncover the coupling slot of the first dipole, by virtue of their superposition. The substrate can comprise one, two or three layers. Plural antennas can constitute an antenna network used as a base element in one-dimensional or two-dimensional network.
    Type: Application
    Filed: August 2, 2007
    Publication date: February 7, 2008
    Inventors: Patrice Brachat, Philippe Ratajczak, Frederic Devillers
  • Electromagnetic probe
    Patent number: 6980167
    Abstract: An electromagnetic probe having at least one assembly including in combination: a coaxial type connectio, a ground plane connected to the outer sheath of the coaxial connection, a reflector cone placed facing the ground plane and shaped to define impedance that is at least substantially constant along its profile, the reflector being electrically isolated, and a dielectric medium interposed at least in part between the reflector cone and the ground plane.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: December 27, 2005
    Assignee: France Telecom
    Inventors: Patrice Brachat, Frédéric Devillers, Philippe Ratajczak, Raymond Bills
  • Electromagnetic probe
    Publication number: 20020109497
    Abstract: The present invention provides an electromagnetic probe, comprising at least one assembly comprising in combination:
    Type: Application
    Filed: January 11, 2002
    Publication date: August 15, 2002
    Inventors: Patrice Brachat, Frederic Devillers, Philippe Ratajczak, Raymond Bills