Patents by Inventor Chikahiro Tomita

Chikahiro Tomita 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).

  • Adaptive array antenna system and method of controlling directivity thereof
    Patent number: 7642962
    Abstract: An adaptive array antenna is disclosed which permits the circuit scale to be reduced by omitting a down-converter, an AD converter, and interconnects for them while controlling the directivity well. In one aspect, the array antenna comprises phase shift-amplitude control modules which accept signals received by antenna elements via an analog-to-digital converter. The value of any one of phase-amplitude change modules is set to 1. The values of the other phase-amplitude change modules are set to 0. Thus, the signal from any one antenna element is accepted. This sequence of operations is repeated as many times as there are antenna elements, whereby signals received by all the antenna elements can be accepted.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: January 5, 2010
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Chikahiro Tomita, Fumitaka Iizuka, Kenji Kamitani
  • ADAPTIVE ARRAY ANTENNA SYSTEM AND METHOD OF CONTROLLING DIRECTIVITY THEREOF
    Publication number: 20090015473
    Abstract: An adaptive array antenna is disclosed which permits the circuit scale to be reduced by omitting a down-converter, an AD converter, and interconnects for them while controlling the directivity well. In one aspect, the array antenna comprises phase shift-amplitude control modules which accept signals received by antenna elements via an analog-to-digital converter. The value of any one of phase-amplitude change modules is set to 1. The values of the other phase-amplitude change modules are set to 0. Thus, the signal from any one antenna element is accepted. This sequence of operations is repeated as many times as there are antenna elements, whereby signals received by all the antenna elements can be accepted.
    Type: Application
    Filed: May 7, 2008
    Publication date: January 15, 2009
    Applicant: Taiyo Yuden Co., Ltd.
    Inventors: Chikahiro Tomita, Fumitaka Iizuka, Kenji Kamitani