Patents by Inventor Mitsunori Hanaka

Mitsunori Hanaka 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).

  • Publication number: 20090061653
    Abstract: A connector unit comprises a case, a substrate and a connector. The case is formed with an opening. The substrate is installed within the case and is formed with a signal conductive pattern and a ground conductive pattern. The ground conductive pattern is electrically connected to the case. The connector comprises a contact, an outer conductor and a high impedance member. The outer conductor is electrically connected to the ground conductive pattern. The outer conductor is insulated from the contact but covers, at least in part, the contact. The contact is electrically connected to the signal conductive pattern. The high impedance member has high impedance in a high frequency range. The high impedance member is positioned between the outer conductor and the case within the opening of the case. For example, the high impedance member is an electric wave absorber.
    Type: Application
    Filed: September 3, 2008
    Publication date: March 5, 2009
    Inventors: Hiroyuki Mizushina, Hiroyuki Miura, Mitsunori Hanaka
  • Patent number: 5477187
    Abstract: In a feed forward amplifier, an RF amplifier is supplied with an input RF signal at an input terminal for amplifying the same; a distortion extraction loop supplied with the input RF signal and further with the output RF signal from the RF amplifier is for extracting non-linear distortion components formed in the output RF signal as a result of amplification in the RF amplifier; a variable phase shifter is provided in the distortion extraction loop for varying a phase of the input RF signal; a variable attenuator is provided in the distortion extraction loop for attenuating an amplitude of the input RF signal that has been supplied to the distortion extraction loop; and a distortion extraction circuit is provided in the distortion extraction loop for producing a distortion output signal that includes non-linear components; further, a control circuit is supplied with the input signal and with the distortion output signal for extracting a main signal component contained in the distortion output signal.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: December 19, 1995
    Assignee: Fujitsu Limited
    Inventors: Fumihiko Kobayashi, Isamu Umino, Yoshiyasu Tsuruoka, Junichi Hasegawa, Toshiaki Suzuki, Tomohiro Nakamura, Teruhiko Kitazawa, Mitsunori Hanaka