Patents by Inventor Daisuke Iwanaka
Daisuke Iwanaka 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).
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Patent number: 11431068Abstract: A frequency variable filter includes variable resonators aligned in a predetermined direction, a coupling part configured to couple the adjacent variable resonators, and a coupling variable dielectric. The variable resonator includes a resonator and a frequency variable dielectric disposed in a movable state relative to the resonator, and is configured to be able to change a resonance frequency according to a position of the frequency variable dielectric with respect to the resonator. This applies to aligned variable resonators other than this variable resonator. The coupling variable dielectric is disposed in a movable state with respect to the coupling part and configured to adjust a coupling coefficient according to an amount of insertion into the coupling part. The coupling variable dielectric is disposed so that a movable surface of the coupling variable dielectric is on the same plane as a movable surface of the frequency variable dielectric.Type: GrantFiled: May 20, 2021Date of Patent: August 30, 2022Assignee: NEC CORPORATIONInventors: Daisuke Iwanaka, Tomoya Kaneko
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Publication number: 20210376435Abstract: A frequency variable filter includes variable resonators aligned in a predetermined direction, a coupling part configured to couple the adjacent variable resonators, and a coupling variable dielectric. The variable resonator includes a resonator and a frequency variable dielectric disposed in a movable state relative to the resonator, and is configured to be able to change a resonance frequency according to a position of the frequency variable dielectric with respect to the resonator. This applies to aligned variable resonators other than this variable resonator. The coupling variable dielectric is disposed in a movable state with respect to the coupling part and configured to adjust a coupling coefficient according to an amount of insertion into the coupling part. The coupling variable dielectric is disposed so that a movable surface of the coupling variable dielectric is on the same plane as a movable surface of the frequency variable dielectric.Type: ApplicationFiled: May 20, 2021Publication date: December 2, 2021Applicant: NEC CorporationInventors: Daisuke IWANAKA, Tomoya KANEKO
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Patent number: 11152676Abstract: A tunable band-pass filter (10) according to the present disclosure includes: a waveguide (11); a plurality of resonators (121) configured to be accommodated in the waveguide (11) and aligned in a longitudinal direction of the waveguide (11); a dielectric plate (13) configured to extend in the longitudinal direction of the waveguide (11) so to be arranged adjacent to the plurality of resonators (121); and a metal pattern (15) for coupling adjustment formed on the dielectric plate (13) at a position corresponding to an interstage of the resonators (121), in which a distance between the dielectric plate (13) and the resonators (121) is variable.Type: GrantFiled: February 18, 2019Date of Patent: October 19, 2021Assignee: NEC CORPORATIONInventor: Daisuke Iwanaka
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Patent number: 10944142Abstract: This tunable bandpass filter is provided with: a conductive member having a plurality of resonance rods protruding so as to be aligned in a single plane; a dielectric plate disposed parallel to the single plane; a drive part which is attached to the dielectric plate and drives the dielectric plate in directions parallel and perpendicular to the single plane; and a waveguide containing at least the resonance rods and the dielectric plate.Type: GrantFiled: March 23, 2017Date of Patent: March 9, 2021Assignee: NEC CORPORATIONInventor: Daisuke Iwanaka
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Publication number: 20210028525Abstract: A tunable band-pass filter (10) according to the present disclosure includes: a waveguide (11); a plurality of resonators (121) configured to be accommodated in the waveguide (11) and aligned in a longitudinal direction of the waveguide (11); a dielectric plate (13) configured to extend in the longitudinal direction of the waveguide (11) so to be arranged adjacent to the plurality of resonators (121); and a metal pattern (15) for coupling adjustment formed on the dielectric plate (13) at a position corresponding to an interstage of the resonators (121), in which a distance between the dielectric plate (13) and the resonators (121) is variable.Type: ApplicationFiled: February 18, 2019Publication date: January 28, 2021Applicant: NEC CORPORATIONInventor: Daisuke IWANAKA
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Publication number: 20200303796Abstract: This tunable bandpass filter is provided with: a conductive member having a plurality of resonance rods protruding so as to be aligned in a single plane; a dielectric plate disposed parallel to the single plane; a drive part which is attached to the dielectric plate and drives the dielectric plate in directions parallel and perpendicular to the single plane; and a waveguide containing at least the resonance rods and the dielectric plate.Type: ApplicationFiled: March 23, 2017Publication date: September 24, 2020Applicant: NEC CorporationInventor: Daisuke IWANAKA
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Patent number: 10673112Abstract: A coaxial line having a small transmission loss and a variable operating frequency can be provided. The coaxial line includes one or a plurality of unit structures repeatedly arranged in a direction of a central axis. The unit structure includes an inner conductor, two dielectrics arranged in the central-axial direction so as to sandwich the inner conductor therebetween, an outer conductor configured to envelop the inner conductor and the dielectrics, and an inductor connected between the inner conductor and the outer conductor.Type: GrantFiled: October 27, 2015Date of Patent: June 2, 2020Assignee: NEC CORPORATIONInventors: Tomoya Kaneko, Daisuke Iwanaka
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Patent number: 10158182Abstract: A first waveguide guides a first radio wave whose electric field is vibrated in a first direction along a second direction. A second waveguide guides the first radio wave along the second direction and is cascade connected to the first waveguide. An input and output end multiplexes the first radio waves from the first and second waveguides and outputs the multiplexed radio wave, and outputs the first radio wave branched off from a radio wave from outside to the first and second waveguides. A first waveguide shift portion is shifted from the first waveguide in the first direction. A second waveguide shift portion is shifted from the second waveguide in the first direction. The vibration directions of electric fields of radio waves passing through the end parts of the first and second waveguide shift portions are rotated by 90° about a third direction.Type: GrantFiled: March 13, 2015Date of Patent: December 18, 2018Assignee: NEC CorporationInventor: Daisuke Iwanaka
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Publication number: 20180316079Abstract: A coaxial line having a small transmission loss and a variable operating frequency can be provided. The coaxial line includes one or a plurality of unit structures repeatedly arranged in a direction of a central axis. The unit structure includes an inner conductor, two dielectrics arranged in the central-axial direction so as to sandwich the inner conductor therebetween, an outer conductor configured to envelop the inner conductor and the dielectrics, and an inductor connected between the inner conductor and the outer conductor.Type: ApplicationFiled: October 27, 2015Publication date: November 1, 2018Applicant: NEC CORPORATIONInventors: Tomoya KANEKO, Daisuke IWANAKA
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Publication number: 20170244175Abstract: A first waveguide guides a first radio wave whose electric field is vibrated in a first direction along a second direction. A second waveguide guides the first radio wave along the second direction and is cascade connected to the first waveguide. An input and output end multiplexes the first radio waves from the first and second waveguides and outputs the multiplexed radio wave, and outputs the first radio wave branched off from a radio wave from outside to the first and second waveguides. A first waveguide shift portion is shifted from the first waveguide in the first direction. A second waveguide shift portion is shifted from the second waveguide in the first direction. The vibration directions of electric fields of radio waves passing through the end parts of the first and second waveguide shift portions are rotated by 90° about a third direction.Type: ApplicationFiled: March 13, 2015Publication date: August 24, 2017Applicant: NEC CorporationInventor: Daisuke IWANAKA
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Patent number: 9692117Abstract: An antenna includes an antenna layer, a coupling layer, and a feeder circuit layer. The antenna layer includes antennas elements. First and second antenna elements are arranged in such a manner that the centers thereof are aligned in a first direction. A third antenna element is arranged in such a manner that the third antenna element is separated from the first antenna element in a second direction and centers of the antenna elements are not aligned in the second direction. A waveguide is formed in the coupling layer.Type: GrantFiled: December 3, 2013Date of Patent: June 27, 2017Assignee: NEC CorporationInventor: Daisuke Iwanaka
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Patent number: 9236661Abstract: A radiowave absorber of the present invention includes: an upper plate that includes a dielectric material containing conductive particles; a lower plate that is arranged parallel to the upper plate, and includes a dielectric material that contains conductive particles; and a plate-shaped support portion that is arranged between the upper plate and the lower plate, and supports the upper plate and the lower plate.Type: GrantFiled: July 29, 2010Date of Patent: January 12, 2016Assignee: NEC CORPORATIONInventors: Daisuke Iwanaka, Akio Kuramoto, Junichi Fukuda
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Publication number: 20150349415Abstract: An antenna includes an antenna layer, a coupling layer, and a feeder circuit layer. The antenna layer includes antennas elements. First and second antennas elements are arranged in such a manner that the centers thereof are aligned in a first direction. A third antenna element is arranged in such a manner that the third antenna element is separated from the first antenna element in a second direction and centers of the antennas elements are not aligned in the second direction. A waveguide is formed in the coupling layer.Type: ApplicationFiled: December 3, 2013Publication date: December 3, 2015Applicant: NEC CORPORATIONInventor: Daisuke IWANAKA
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Publication number: 20150236392Abstract: A band-pass filter of the present invention is a band-pass filter provided with rectangular waveguides separated from each other along a middle of a broad width surface of the filter, and a metal plate interposed between the rectangular waveguides, wherein at least one of coupling plates formed of the metal plate is cut. Accordingly, it is possible to implement a band-pass filter having an increased range of values of the implementable coupling coefficient, and a wide bandwidth requiring a high coupling coefficient.Type: ApplicationFiled: September 4, 2013Publication date: August 20, 2015Applicant: NEC CORPORATIONInventor: Daisuke Iwanaka
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Publication number: 20120306712Abstract: A radiowave absorber of the present invention includes: an upper plate that includes a dielectric material containing conductive particles; a lower plate that is arranged parallel to the upper plate, and includes a dielectric material that contains conductive particles; and a plate-shaped support portion that is arranged between the upper plate and the lower plate, and supports the upper plate and the lower plate.Type: ApplicationFiled: July 29, 2010Publication date: December 6, 2012Applicant: NEC CORPORATIONInventors: Daisuke Iwanaka, Akio Kuramoto, Junichi Fukuda