Patents by Inventor Hayato Akazawa

Hayato Akazawa 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).

  • Radio direction and position finding apparatus
    Patent number: 6759982
    Abstract: A detection apparatus is provided to detect the direction of arrival and the position of an emission source of radio wave with high accuracy.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: July 6, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hayato Akazawa, Eiji Kobayashi, Tsugihiro Kurihara, Kazuaki Kimura, Kazutaka Iwase
  • Radio direction and position finding apparatus
    Publication number: 20030218569
    Abstract: A detection apparatus is provided to detect the direction of arrival and the position of an emission source of radio wave with high accuracy.
    Type: Application
    Filed: June 3, 2003
    Publication date: November 27, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hayato Akazawa, Eiji Kobayashi, Tsugihiro Kurihara, Kazuaki Kimura, Kazutaka Iwase
  • Radio direction and position finding apparatus
    Patent number: 6373435
    Abstract: An object of the present invention is to provide a selective level measuring apparatus with wider dynamic range of effective value detection, compared with the range by a conventional one. The apparatus according to the present invention comprises a gain control means arranged before an effective value detection section for varying a gain by a control voltage, so that a signal level inputted into the effective value detection section may be kept to be constant level by the gain control means, and the signal level of the signal to be measured is measured and indicated through the control voltage. Performing such operations allows the selective level measuring apparatus for the effective value detection to secure a dynamic range defined by a variable quantity of the gain control means. Accordingly, the present invention provides the wider dynamic range of the effective value detection comparing with that by the conventional one.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: April 16, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tsugihiro Kurihara, Hayato Akazawa
  • Radio direction and position finding apparatus
    Publication number: 20010020916
    Abstract: An object of the present invention is to provide a selective level measuring apparatus with wider dynamic range of effective value detection, compared with the range by a conventional one. The apparatus according to the present invention comprises a gain control means arranged before an effective value detection section for varying a gain by a control voltage, so that a signal level inputted into the effective value detection section may be kept to be constant level by the gain control means, and the signal level of the signal to be measured is measured and indicated through the control voltage. Performing such operations allows the selective level measuring apparatus for the effective value detection to secure a dynamic range defined by a variable quantity of the gain control means. Accordingly, the present invention provides the wider dynamic range of the effective value detection comparing with that by the conventional one.
    Type: Application
    Filed: January 31, 2001
    Publication date: September 13, 2001
    Inventors: Tsugihiro Kurihara, Hayato Akazawa