Patents by Inventor Mitsuru Makihara

Mitsuru Makihara 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).

  • Harmonic suppression resonator, harmonic propagation blocking filter, and radar apparatus
    Patent number: 8354898
    Abstract: A harmonic suppression resonator comprises a plurality of waveguide resonators that resonate in TE mode, in which harmonic suppression resonator, adjoining resonators are coupled via a plurality of coupling windows. Four coupling windows 33bc1, 33bc2, 33bc3 and 33bc4 are provided between a resonant region 51b and a resonant region adjoining the resonant region 51b. These coupling windows allow fundamental wave modes of the adjoining resonators to be coupled mainly by magnetically coupling. The coupling windows 33bc3 and 33bc4 allow second harmonic modes of the adjoining resonators to be electrically coupled, and the coupling windows 33bc1 and 33bc2 allow the second harmonic modes of the adjoining resonators to be magnetically coupled. By causing the amount of the electrically coupling and the amount of the magnetically coupling to be substantially equal, the coupling of the second harmonic modes is negated, whereby propagation of the second harmonic is blocked.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: January 15, 2013
    Assignee: Furuno Electric Company Limited
    Inventors: Ken'ichi Iio, Mitsuru Makihara, Hiroshi Nagata, Yoshinobu Hashimoto
  • HARMONIC SUPPRESSION RESONATOR, HARMONIC PROPAGATION BLOCKING FILTER, AND RADAR APPARATUS
    Publication number: 20090201106
    Abstract: A harmonic suppression resonator comprises a plurality of waveguide resonators that resonate in TE mode, in which harmonic suppression resonator, adjoining resonators are coupled via a plurality of coupling windows. Four coupling windows 33bc1, 33bc2, 33bc3 and 33bc4 are provided between a resonant region 51b and a resonant region adjoining the resonant region 51b. These coupling windows allow fundamental wave modes of the adjoining resonators to be coupled mainly by magnetically coupling. The coupling windows 33bc3 and 33bc4 allow second harmonic modes of the adjoining resonators to be electrically coupled, and the coupling windows 33bc1 and 33bc2 allow the second harmonic modes of the adjoining resonators to be magnetically coupled. By causing the amount of the electrically coupling and the amount of the magnetically coupling to be substantially equal, the coupling of the second harmonic modes is negated, whereby propagation of the second harmonic is blocked.
    Type: Application
    Filed: December 23, 2008
    Publication date: August 13, 2009
    Inventors: Ken'ichi Iio, Mitsuru Makihara, Hiroshi Nagata, Yoshinobu Hashimoto