Patents by Inventor Marc Solal

Marc Solal 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).

  • Surface-wave distributed acoustic reflection transducer and filter including such a transducer
    Patent number: 5703427
    Abstract: The distributed acoustic reflection transducer has a reflection function which includes at least one reversal of sign, that is to say it possesses at least one reflector and, in general, a combination of reflectors, the center of which is at a distance of k.lambda./2+.lambda./4 from the center of the other reflectors, .lambda. being the wavelength corresponding to the central operating frequency of the transducer.The applications will be for the production of surface-wave filters in radio communication systems.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: December 30, 1997
    Assignee: Thomson-CSF
    Inventors: Marc Solal, Pascal Ventura, Jean-Michel Hode
  • Surface wave filter filtering delay transfer function
    Patent number: 5475348
    Abstract: It consists of several channels (V1, V2) in parallel, which exhibit an inter-transducer gap difference (2.sub.1 -4.sub.1 ; 2.sub.2 -4.sub.2) equal to an even multiple of the half-wavelength (.lambda.) at the central frequency, from one channel to the next, so as to cancel the delay line transfer function which corresponds to the direct path between transducers.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: December 12, 1995
    Assignee: Thomson-CSF
    Inventors: Jean-Michel Hode, Jean Desbois, Marc Solal
  • Directional antenna with multiple transducers, in particular for a sonar
    Patent number: 5020034
    Abstract: Antenna, in particular for a sonar, allowing to form directional channels by feeding the transducers by a reduced number of sources by means of an interpolation network that permits to maintain to a low level the image lobes in spite of this reduction of the number of sources.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: May 28, 1991
    Assignee: Thomson CSF
    Inventors: Marc Solal, Jean-Francois Gelly