Patents by Inventor Yuichi Chikahiro

Yuichi Chikahiro 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).

  • Method for calibrating microwave radiometer
    Patent number: 11231327
    Abstract: Provided is a method of calibrating a microwave radiometer, which eliminates use of liquid nitrogen as a calibration source. The method is applied to a microwave radiometer configured to receive, by a receiver having a primary radiator connected thereto, a radio wave emitted from an object to be measured depending on a temperature of the object to be measured and to measure a brightness temperature of the object to be measured from an output signal of the receiver. In the method, the method a noise temperature Trx of the receiver appearing on an output side of the receiver is calibrated by observing a plurality of calibration sources having known brightness temperatures. The method includes using a radio wave reflector configured to totally reflect noise radiated from an input side of the receiver as one of the plurality of calibration sources.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: January 25, 2022
    Assignee: ELECS INDUSTRY CO., LTD.
    Inventors: Noriyuki Kawaguchi, Tadashi Takano, Kensuke Ozeki, Yuichi Chikahiro, Kenichi Harada
  • METHOD FOR CALIBRATING MICROWAVE RADIOMETER
    Publication number: 20210239536
    Abstract: Provided is a method of calibrating a microwave radiometer, which eliminates use of liquid nitrogen as a calibration source. The method is applied to a microwave radiometer configured to receive, by a receiver having a primary radiator connected thereto, a radio wave emitted from an object to be measured depending on a temperature of the object to be measured and to measure a brightness temperature of the object to be measured from an output signal of the receiver. In the method, the method a noise temperature Trx of the receiver appearing on an output side of the receiver is calibrated by observing a plurality of calibration sources having known brightness temperatures. The method includes using a radio wave reflector configured to totally reflect noise radiated from an input side of the receiver as one of the plurality of calibration sources.
    Type: Application
    Filed: July 1, 2019
    Publication date: August 5, 2021
    Applicant: ELECS INDUSTRY CO., LTD.
    Inventors: Noriyuki Kawaguchi, Tadashi Takano, Kensuke Ozeki, Yuichi Chikahiro, Kenichi Harada