Patents by Inventor Tamotsu Nishino

Tamotsu Nishino 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).

  • Impedance matching circuit and antenna apparatus using the same
    Publication number: 20020118075
    Abstract: One matching circuit (8-2) comprises a transmission line (6b) of a predetermined electrical length and a parallel resonance circuit (5) connected in parallel with the transmission line. The resonance circuit has a resonant frequency f2 and a predetermined susceptance at a frequency f1 lower than the frequency f2. ANother matching circuit (8-1) comprises a transmission line (6a) of a predetermined electrical length and a capacitor element (b 3a) connected in series with the transmission line between an input terminal (2) of an antenna (1) and the matching circuit (8-2) so that the input impedence of the antenna at the frequency f2 may match the characteristic impedance of an external circuit (10).
    Type: Application
    Filed: July 17, 2001
    Publication date: August 29, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Tetsu Ohwada, Moriyasu Miyazaki, Tamotsu Nishino, Tsutomu Endo
  • Antenna device provided with matching circuits adapted for reflection coefficients
    Patent number: 6421026
    Abstract: An antenna device including matching circuits corresponding to reflection coefficients of antenna elements determined by taking into account the couplings between the antenna elements occurring when the antenna elements are excited with corresponding excitation amplitudes and excitation phases at each of operational frequencies.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: July 16, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tamotsu Nishino, Moriyasu Miyazaki, Tsutomu Endo, Tetsu Ohwada
  • Antenna device provided with matching circuits adapted for reflection coefficients
    Publication number: 20020000949
    Abstract: An antenna device including matching circuits corresponding to reflection coefficients of antenna elements determined by taking into account the couplings between the antenna elements occurring when the antenna elements are excited with corresponding excitation amplitudes and excitation phases at each of operational frequencies.
    Type: Application
    Filed: July 18, 2001
    Publication date: January 3, 2002
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tamotsu Nishino, Moriyasu Miyazaki, Tsutomu Endo, Tetsu Ohwada
  • High frequency filter having a plurality of serially coupled first resonators and a second resonator
    Patent number: 5896073
    Abstract: A high frequency filter includes a dielectric plate 8, an outer conductor 9 formed on the one surface of the dielectric plate 8, a plurality of strip conductors 10a-10d formed approximately in parallel on the other surface of the dielectric plate 8, a strip conductor 15 formed in a direction crossing the strip conductors 10a-10d, short-circuiting portions 11 and 16 connecting the one ends of the strip conductors 10a-10d and the strip conductor to the outer conductor 9, respectively, and further comprises a plurality of resonators 110a-110d constructed by the strip conductors 10, a plurality of capacitors (gaps) 12 coupling the resonators to each other to be connected in series, capacitors 13 connecting the strip conductors 10a, 10d to an input terminal and an outer conductor, respectively, a resonator 200 constructed by the strip conductor 15, and a plurality of capacitors (gaps) 33 connecting the strip conductors 10a, 10d to the resonator 200.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: April 20, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Moriyasu Miyazaki, Naofumi Yoneda, Tamotsu Nishino