Patents by Inventor Minoru Tajima

Minoru Tajima 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 of measuring the null angle of a monopulse antenna and apparatus therefor
    Patent number: 5181040
    Abstract: A method of and an apparatus for measuring the null angle in the difference vs. sum pattern and in the difference pattern of a monopulse antenna. The null angle of the monopulse antenna in the radiation pattern is acquired by transmitting an RF signal from a plurality of antenna elements to the monopulse antenna, acquiring the sum signal and difference signals in the directions of the respective antenna elements and acquiring the null angle in accordance with the sum and difference signals. The apparatus comprises a rotator for changing the direction of the monopulse antenna and a transmitting antenna facing the monopulse antenna for transmitting a test signal to the monopulse antenna.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: January 19, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masato Inoue, Minoru Tajima, Nobutake Orime, Takashi Katagi