Patents by Inventor Fumihiko Aiga
Fumihiko Aiga 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: 7613434Abstract: A multiplexer includes: a first band-pass filter for a first channel, which is formed in a microstrip line on a dielectric substrate and has a first branching characteristic having a center frequency of f1 and an attenuation pole at a frequency of fa1; and a second band-pass filter for a second channel, which is formed in a microstrip line on a dielectric substrate and has a second branching characteristic having a center frequency of f2 and an attenuation pole at a frequency of fa2. The following relationships (1) to (5) are satisfied: (1) f1<f2; (2) f1<fa1; (3) fa2<f2; (4) f2?fa1<(f2?f1)/2; and (5) fa2?f1<(f2?f1)/2. The second branching characteristic exhibits ?20 dB or less at the frequency of fa1 and the first branching characteristic exhibits ?20 dB or less at the frequency of fa2.Type: GrantFiled: March 14, 2007Date of Patent: November 3, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Fumihiko Aiga, Hiroyuki Kayano, Tatsunori Hashimoto, Noritsugu Shiokawa
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Publication number: 20090137388Abstract: A solid catalyst has a close-packed structure and has a first surface layer and a second surface layer, wherein the first surface layer includes platinum as a main component and the second surface layer contains PtaXb (wherein X is one element selected from the group consisting of Zr, Hf, Nb, Ta, Mo, and W; a+b=100; and 25?b?50); and a fuel cell includes the solid catalyst as an anode-side electrode catalyst.Type: ApplicationFiled: November 26, 2008Publication date: May 28, 2009Inventors: Takashi Yoshida, Satoshi Itoh, Fumihiko Aiga, Yoshiko Hiraoka, Reiko Yoshimura, Tsukasa Tada, Yasutaka Nishida
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Publication number: 20090136826Abstract: A solid catalyst having a close-packed structure has basic structural units present in the surface of the solid catalyst, the basic structural units including (i) a triangular lattice constituted of atoms of platinum, ruthenium, and at least one additional element which are disposed at the vertexes in the triangular lattice so that each atom of one of the elements adjoins atoms of the other elements or (ii) a rhombic lattice constituted of atoms of platinum, ruthenium, and at least one additional element which are disposed at the vertexes in the rhombic lattice in an atomic ratio of 1:2:1 so that each ruthenium atom directly adjoins a platinum atom and an atom of the additional element; and a fuel cell includes either of the solid catalyst as an anode-side electrode catalyst.Type: ApplicationFiled: November 25, 2008Publication date: May 28, 2009Inventors: Takashi Yoshida, Fumihiko Aiga, Satoshi Itoh, Yoshiko Hiraoka, Reiko Yoshimura, Tsukasa Tada
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Patent number: 7510784Abstract: A light emitting device includes a light emitting element and a luminescent medium. The luminescent medium contains a rare earth complex wherein a compound represented by the following formula (1) is employed as a ligand: wherein X and Y are the same or different and are individually O, S or Se; R1, R2, R3 and R4 are the same or different, excluding a situation where R1, R2, R3 and R4 are all the same as each other, and are individually an alkyl or alkoxy group of a linear or branched structure having not more than 20 carbon atoms, a phenyl group, a biphenyl group, a naphthyl group, a heterocyclic group or a substitution product of any of these groups; n is an integer ranging from 2 to 20; and Z and W are the same or different and are individually a hydrogen atom, a deuterium atom, a halogen atom or an alkyl group.Type: GrantFiled: June 14, 2007Date of Patent: March 31, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Hiroki Iwanaga, Fumihiko Aiga, Naomi Shida, Akio Amano
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Publication number: 20090021444Abstract: A high-impedance substrate is provided, which includes a metallic plate employed as a ground plane, a resonance circuit layer spaced away from the metallic plate by a distance “t”, the resonance circuit layer being provided with at least two resonance circuits having the same height and disposed side by side with a distance “g”, a connecting component connecting the resonance circuit with the metallic plate, and a magnetic material layer interposed between the metallic plate and the resonance circuit layer. The distance “t” between the metallic plate and the resonance circuit layer is confined within the range of 0.1 to 10 mm, the distance “g” between neighboring resonance circuits is confined within the range of 0.01 to 5 mm, the distance “h” between the magnetic material layer and the resonance circuit layer is confined within the range represented by the following inequality 1: g/2?h?t/2??inequality 1.Type: ApplicationFiled: July 18, 2008Publication date: January 22, 2009Inventors: Fumihiko Aiga, Seiichi Suenaga, Kouichi Harada, Tomohiro Suetsuna, Maki Yonetsu, Naoyuki Nakagawa, Tomoko Eguchi
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Patent number: 7471863Abstract: A near-field interaction control element includes a near-field optical waveguide containing particles formed of a metal, a metal anion or a metal cation with a diameter of 0.5 nm or more and 3 nm or less and a dielectric constant of ?2.5 or more and ?1.5 or less, an electron injector/discharger injecting or discharging an electron into or from the particles contained in the near-field optical waveguide to vary a dielectric constant of the near-field optical waveguide, a near-field light introducing part introducing near-field light into the near-field optical waveguide, and a near-field light emitting part emitting the near-field light having guided through the near-field optical waveguide.Type: GrantFiled: March 26, 2007Date of Patent: December 30, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Kenji Todori, Miho Maruyama, Reiko Yoshimura, Fumihiko Aiga, Tsukasa Tada, Ko Yamada
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Publication number: 20080303426Abstract: The present invention provides a fluorescent rare earth complex having high solubility to a medium, showing fluorescence of high intensity and possessing excellent durability, and also provides a light-emitting element using that complex. The rare earth complex comprises a rare earth ion and a phosphine oxide ligand, and the phosphine oxide ligand contains a phosphorus atom connecting to at least one phenyl group. In the phenyl group, at least one of the meta-positions is substituted. It is also necessary that the para-position of the phenyl group be not substituted.Type: ApplicationFiled: May 21, 2008Publication date: December 11, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hiroki Iwanaga, Fumihiko Aiga, Takahiro Sato
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Patent number: 7411475Abstract: A superconductor filter comprises a plurality of resonance elements arranged between input-output lines formed on a substrate. Metal conductor sections serving to inhibit the spatial coupling between the adjacent resonance elements are arranged between prescribed resonance elements, and a prescribed resonance element is coupled with another resonance element by a coupling transmission line. It follows that each resonance element is coupled with another resonance element by the direct coupling via the coupling transmission line or by the spatial coupling via the space.Type: GrantFiled: March 13, 2007Date of Patent: August 12, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Hiroyuki Fuke, Yoshiaki Terashima, Fumihiko Aiga, Mutsuki Yamazaki, Hiroyuki Kayano, Tatsunori Hashimoto
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Patent number: 7372067Abstract: Refractive index changing apparatus includes quantum dots each having discrete energy levels including ground level and excited level, the excited level being higher than the ground level even if energy due to ambient temperature is provided on the quantum dots, barrier structure unit formed of dielectric which surrounds the quantum dots, injection unit configured to inject an electron into position of the ground level in each quantum dot via the barrier structure unit, utilizing tunneling effect, or to prevent injection of an electron into the position, injecting the electron or preventing injection of the electron controlled by changing an energy level of the injection unit, source which emits, to the quantum dots, first light beam having first energy for exciting electrons from the ground level to the excited level, and source which emits, to the quantum dots, second light beam having second energy different from the first energy.Type: GrantFiled: September 29, 2005Date of Patent: May 13, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Kenji Todori, Reiko Yoshimura, Fumihiko Aiga, Tsukasa Tada
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Publication number: 20080107371Abstract: A near-field interaction control element includes a near-field optical waveguide containing particles formed of a metal, a metal anion or a metal cation with a diameter of 0.5 nm or more and 3 nm or less and a dielectric constant of ?2.5 or more and ?1.5 or less, an electron injector/discharger injecting or discharging an electron into or from the particles contained in the near-field optical waveguide to vary a dielectric constant of the near-field optical waveguide, a near-field light introducing part introducing near-field light into the near-field optical waveguide, and a near-field light emitting part emitting the near-field light having guided through the near-field optical waveguide.Type: ApplicationFiled: March 26, 2007Publication date: May 8, 2008Inventors: Kenji Todori, Miho Maruyama, Reiko Yoshimura, Fumihiko Aiga, Tsukasa Tada, Ko Yamada
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Publication number: 20080055181Abstract: In resonant elements 102 to 105 constituting a resonant circuit, an uncontrolled cross coupling which exists between two resonant elements is controlled by using a coupling element 106 which is newly arranged between the resonant elements, whereby it is possible to create a state where two resonant elements are not coupled with each other or a state where the amount of the coupling is reduced, which states are difficult to be realized on a plane. As a result, it is possible to improve characteristics of a planar filter.Type: ApplicationFiled: May 21, 2007Publication date: March 6, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tamio Kawaguchi, Fumihiko Aiga, Hiroyuki Kayano, Noritsugu Shiokawa, Tatsunori Hashimoto
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Publication number: 20080037590Abstract: A multiplexer includes: a first band-pass filter for a first channel, which is formed in a microstrip line on a dielectric substrate and has a first branching characteristic having a center frequency of f1 and an attenuation pole at a frequency of fa1; and a second band-pass filter for a second channel, which is formed in a microstrip line on a dielectric substrate and has a second branching characteristic having a center frequency of f2 and an attenuation pole at a frequency of fa2. The following relationships (1) to (5) are satisfied: (1) f1<f2; (2) f1<fa1; (3) fa2<f2; (4) f2?fa1<(f2?f1)/2; and (5) fa2?f1<(f2?f1)/2. The second branching characteristic exhibits ?20 dB or less at the frequency of fa1 and the first branching characteristic exhibits ?20 dB or less at the frequency of fa2.Type: ApplicationFiled: March 14, 2007Publication date: February 14, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Fumihiko Aiga, Hiroyuki Kayano, Tatsunori Hashimoto, Noritsugu Shiokawa
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Publication number: 20080001515Abstract: This invention provides a fluorescent complex possessing excellent durability and luminous intensity, and a lighting system utilizing the same. The fluorescent complex comprises a rare earth ion and a ?-diketone ligand. In the fluorescent complex, the ?-diketone ligand comprises a ?-diketone skeleton, a fluoroalkyl group, and an electron donative linking group for linking the ?-diketone skeleton to the fluoroalkyl group. The fluorescent complex can be utilized in a lighting system. The rare earth ion is preferably a lanthanoid ion, particularly preferably a europium or terbium ion. When the ?-diketone ligand further comprises an aromatic group, the luminous intensity can be further improved.Type: ApplicationFiled: February 26, 2007Publication date: January 3, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hiroki Iwanaga, Akio Amano, Fumihiko Aiga
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Patent number: 7305261Abstract: A band pass filter which is configured by a microstrip line, or a strip line is provided. The band pass filter has a first half wavelength resonator which resonates at a center frequency of a pass band, a second half wavelength resonator which resonates at the center frequency of the pass band, and a transmission line through which the first half wavelength resonator is wire-coupled to the second half wavelength resonator. A strong coupling can be stably realized without causing deviation of the resonance frequencies of resonators.Type: GrantFiled: May 5, 2004Date of Patent: December 4, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Fumihiko Aiga, Yoshiaki Terashima, Hiroyuki Fuke, Mutsuki Yamazaki, Tatsunori Hashimoto, Hiroyuki Kayano
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Publication number: 20070269681Abstract: A high-frequency magnetic material comprises an artificial medium having a structure in which a plurality of unit particles align in a matrix medium, wherein the unit particle is composed of a split ring type conductor, or a combination of the split ring type conductor and a dielectric material, and the matrix medium contains a magnetic material.Type: ApplicationFiled: May 9, 2007Publication date: November 22, 2007Inventors: Fumihiko AIGA, Seiichi Suenaga, Maki Yonetsu
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Publication number: 20070241842Abstract: A superconductor filter comprises a plurality of resonance elements arranged between input-output lines formed on a substrate. Metal conductor sections serving to inhibit the spatial coupling between the adjacent resonance elements are arranged between prescribed resonance elements, and a prescribed resonance element is coupled with another resonance element by a coupling transmission line. It follows that each resonance element is coupled with another resonance element by the direct coupling via the coupling transmission line or by the spatial coupling via the space.Type: ApplicationFiled: March 13, 2007Publication date: October 18, 2007Applicant: Kabushiki Kaisha ToshibaInventors: Hiroyuki Fuke, Yoshiaki Terashima, Fumihiko Aiga, Mutsuki Yamazaki, Hiroyuki Kayano, Tatsunori Hashimoto
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Publication number: 20070236129Abstract: A light emitting device includes a light emitting element and a luminescent medium. The luminescent medium contains a rare earth complex wherein a compound represented by the following formula (1) is employed as a ligand: wherein X and Y are the same or different and are individually O, S or Se; R1, R2, R3 and R4 are the same or different, excluding a situation where R1, R2, R3 and R4 are all the same as each other, and are individually an alkyl or alkoxy group of a linear or branched structure having not more than 20 carbon atoms, a phenyl group, a biphenyl group, a naphthyl group, a heterocyclic group or a substitution product of any of these groups; n is an integer ranging from 2 to 20; and Z and W are the same or different and are individually a hydrogen atom, a deuterium atom, a halogen atom or an alkyl group.Type: ApplicationFiled: June 14, 2007Publication date: October 11, 2007Inventors: Hiroki IWANAGA, Fumihiko Aiga, Naomi Shida, Akio Amano
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Publication number: 20070229201Abstract: In a filter circuit, a conductor layer is formed on one side of a dielectric substrate, and a resonator pattern of resonators, input and sections are formed of micro strip lines on the other side of the dielectric substrate. A transmission line coupling the resonators and is also formed of a micro strip line on the other side. An open stub branches off from the transmission line, and the electric length of this open stub is set to an integral multiple of a half-wave length of a resonance wave length corresponding to a resonance frequency of the filter.Type: ApplicationFiled: March 20, 2007Publication date: October 4, 2007Inventors: Fumihiko Aiga, Hiroyuki Kayano, Noritsugu Shiokawa, Tamio Kawaguchi, Tatsunori Hashimoto
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Patent number: 7250117Abstract: A light emitting device includes a light emitting element and a luminescent medium. The luminescent medium contains a rare earth complex wherein a compound represented by the following formula (1) is employed as a ligand: wherein X and Y are the same or different and are individually O, S or Se; R1, R2, R3 and R4 are the same or different, excluding a situation where R1, R2, R3 and R4 are all the same as each other, and are individually an alkyl or alkoxy group of a linear or branched structure having not more than 20 carbon atoms, a phenyl group, a biphenyl group, a naphthyl group, a heterocyclic group or a substitution product of any of these groups; n is an integer ranging from 2 to 20; and Z and W are the same or different and are individually a hydrogen atom, a deuterium atom, a halogen atom or an alkyl group.Type: GrantFiled: June 23, 2004Date of Patent: July 31, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Hiroki Iwanaga, Fumihiko Aiga, Naomi Shida, Akio Amano
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Patent number: 7215225Abstract: A superconductor filter comprises a plurality of resonance elements arranged between input-output lines formed on a substrate. Metal conductor sections serving to inhibit the spatial coupling between the adjacent resonance elements are arranged between prescribed resonance elements, and a prescribed resonance element is coupled with another resonance element by a coupling transmission line. It follows that each resonance element is coupled with another resonance element by the direct coupling via the coupling transmission line or by the spatial coupling via the space.Type: GrantFiled: May 20, 2004Date of Patent: May 8, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Hiroyuki Fuke, Yoshiaki Terashima, Fumihiko Aiga, Mutsuki Yamazaki, Hiroyuki Kayano, Tatsunori Hashimoto