Patents by Inventor Naoki Mizoguchi
Naoki Mizoguchi 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: 6630875Abstract: A dual-mode band-pass filter having a greatly reduced size and a high design flexibility, includes a frame-shaped electrode pattern disposed on one surface or inside a dielectric substrate. A pair of input-output circuits are coupled to the frame-shaped electrode pattern. The plane shape and the line-width of the frame-shaped electrode pattern are configured so that two generated resonance modes are coupled to each other.Type: GrantFiled: September 27, 2002Date of Patent: October 7, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Naoki Mizoguchi, Hisatake Okamura, Seiji Kamba
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Publication number: 20030160667Abstract: A dual mode band-pass filter includes a metallic film for defining a resonator, disposed on the first main surface of a dielectric substrate having first and second main surfaces, or inside of the dielectric substrate. An opening is formed in the metallic film. At least one ground electrode is provided on the second main surface of the dielectric substrate or inside of the dielectric substrate, so as to be opposed to the metallic film through a dielectric layer. A pair of input-output coupling circuits is connected to the metallic film.Type: ApplicationFiled: March 17, 2003Publication date: August 28, 2003Applicant: Murata manufacturing Co., Ltd.Inventors: Hisatake Okamura, Seiji Kanba, Naoki Mizoguchi
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Patent number: 6608537Abstract: A band-pass filter includes a metal film provided on a dielectric body. The shape and size of the metal film and the coupling points of input-output coupling circuits are selected such that first and second resonance modes are generated. The metal film has protruding portions or concavities provided thereon such that resonance electric field strength in the first or second resonance mode is controlled to couple the first and second resonance modes to each other.Type: GrantFiled: May 15, 2001Date of Patent: August 19, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura, Harufumi Mandai
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Patent number: 6580342Abstract: A method of producing a band-pass filter includes selecting the shape of a metallic film and the connection points of input-output coupling circuits such that first and second resonance modes are generated in a metallic film provided on a dielectric substrate. At least a portion of the resonance current or the resonance electric field in at least one of the resonance modes is made discontinuous such that the first and second resonance modes are coupled.Type: GrantFiled: August 7, 2002Date of Patent: June 17, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura
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Patent number: 6563403Abstract: A dual mode band-pass filter includes a dielectric body having first and second main surfaces, a metal film partially disposed on the first main surface of the dielectric body or at a predetermined level in the dielectric body, the metal film having any one of an opening, a protrusion, and a cut-out arranged to combine two resonant modes, at least one ground electrode disposed on the second main surface or in the interior of the dielectric body so as to be opposed to the metal film with a portion of the dielectric body being disposed therebetween, and a pair of input-output coupling circuits that are coupled with different portions of the metal film. The dielectric body includes a dielectric ceramic containing a ceramic and a glass as main constituents, capable of being fired simultaneously with Cu, Ag, or Au, and having a Q value of more than approximately 300 at about 10 GHz.Type: GrantFiled: May 29, 2001Date of Patent: May 13, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura, Osamu Chikagawa, Naoya Mori, Yasutaka Sugimoto
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Patent number: 6556108Abstract: A method of producing a band-pass filter includes selecting the shape of a metallic film and the connection points of input-output coupling circuits such that first and second resonance modes are generated in a metallic film provided on a dielectric substrate. At least a portion of the resonance current or the resonance electric field in at least one of the resonance modes is made discontinuous such that the first and second resonance modes are coupled.Type: GrantFiled: February 14, 2001Date of Patent: April 29, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura
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Patent number: 6556109Abstract: A dual mode band pass filter is constructed to be very compact and such that the coupling strength and bandwidth can be easily and widely adjusted while maintaining sufficient freedom of design. A metal film for forming a resonator is arranged on a first main surface of a dielectric body or at a certain height in the dielectric body. At least one ground electrode is arranged such that the ground electrode is opposed to the metal film via the dielectric body. The metal film is connected to input/output coupling circuits. In the region where the metal film is opposed to the ground electrode, two portions are partially provided. Each of these two portions has a relative permittivity that is different from the relative permittivity of the remaining portion, in order to couple two resonance modes.Type: GrantFiled: May 15, 2001Date of Patent: April 29, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura, Harufumi Mandai
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Publication number: 20030076201Abstract: A dual-mode band-pass filter having a greatly reduced size and a high design flexibility, includes a frame-shaped electrode pattern disposed on one surface or inside a dielectric substrate. A pair of input-output circuits are coupled to the frame-shaped electrode pattern. The plane shape and the line-width of the frame-shaped electrode pattern are configured so that two generated resonance modes are coupled to each other.Type: ApplicationFiled: September 27, 2002Publication date: April 24, 2003Applicant: Murata Manufacturing Co., Ltd.Inventors: Naoki Mizoguchi, Hisatake Okamura, Seiji Kamba
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Patent number: 6545568Abstract: A dual-mode band-pass filter having a greatly reduced size and a high design flexibility, includes a frame-shaped electrode pattern disposed on one surface or inside a dielectric substrate. A pair of input-output circuits are coupled to the frame-shaped electrode pattern. The plane shape and the line-width of the frame-shaped electrode pattern are configured so that two generated resonance modes are coupled to each other.Type: GrantFiled: July 10, 2001Date of Patent: April 8, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Naoki Mizoguchi, Hisatake Okamura, Seiji Kamba
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Patent number: 6507251Abstract: In a dual-mode bandpass filter, a metal film is partially formed on one surface of a dielectric substrate or at a certain vertical level within the dielectric substrate, first and second input/output coupling circuits are coupled to the metal film, at least one capacitor is loaded to the metal film so that when an input signal is applied from either input/output coupling circuit, two resonant modes generated in the metal film are coupled. The capacitor preferably includes via-hole electrodes opposing the metal film.Type: GrantFiled: September 18, 2001Date of Patent: January 14, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Naoki Mizoguchi, Hisatake Okamura, Seiji Kamba
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Publication number: 20020186104Abstract: A method of producing a band-pass filter includes selecting the shape of a metallic film and the connection points of input-output coupling circuits such that first and second resonance modes are generated in a metallic film provided on a dielectric substrate. At least a portion of the resonance current or the resonance electric field in at least one of the resonance modes is made discontinuous such that the first and second resonance modes are coupled.Type: ApplicationFiled: August 7, 2002Publication date: December 12, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura
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Publication number: 20020149447Abstract: A method of producing a band-pass filter includes selecting the shape of a metallic film and the connection points of input-output coupling circuits such that first and second resonance modes are generated in a metallic film provided on a dielectric substrate. At least a portion of the resonance current or the resonance electric field in at least one of the resonance modes is made discontinuous such that the first and second resonance modes are coupled.Type: ApplicationFiled: June 14, 2002Publication date: October 17, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura
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Publication number: 20020053959Abstract: A dual mode band-pass filter includes a metallic film for defining a resonator, disposed on the first main surface of a dielectric substrate having first and second main surfaces, or inside of the dielectric substrate. An opening is formed in the metallic film. At least one ground electrode is provided on the second main surface of the dielectric substrate or inside of the dielectric substrate, so as to be opposed to the metallic film through a dielectric layer. A pair of input-output coupling circuits is connected to the metallic film.Type: ApplicationFiled: February 13, 2001Publication date: May 9, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Hisatake Okamura, Seiji Kanba, Naoki Mizoguchi
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Publication number: 20020053960Abstract: A dual mode band-pass filter includes a dielectric body having first and second main surfaces, a metal film partially disposed on the first main surface of the dielectric body or at a predetermined level in the dielectric body, the metal film having any one of an opening, a protrusion, and a cut-out arranged to combine two resonant modes, at least one ground electrode disposed on the second main surface or in the interior of the dielectric body so as to be opposed to the metal film with a portion of the dielectric body being disposed therebetween, and a pair of input-output coupling circuits that are coupled with different portions of the metal film. The dielectric body includes a dielectric ceramic containing a ceramic and a glass as main constituents, capable of being fired simultaneously with Cu, Ag, or Au, and having a Q value of more than approximately 300 at about 10 GHz.Type: ApplicationFiled: May 29, 2001Publication date: May 9, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura, Osamu Chikagawa, Naoya Mori, Yasutaka Sugimoto
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Publication number: 20020039059Abstract: A dual mode band pass filter is constructed to be very compact and such that the coupling strength and bandwidth can be easily and widely adjusted while maintaining sufficient freedom of design. A metal film for forming a resonator is arranged on a first main surface of a dielectric body or at a certain height in the dielectric body. At least one ground electrode is arranged such that the ground electrode is opposed to the metal film via the dielectric body. The metal film is connected to input/output coupling circuits. In the region where the metal film is opposed to the ground electrode, two portions are partially provided. Each of these two portions has a relative permittivity that is different from the relative permittivity of the remaining portion, in order to couple two resonance modes.Type: ApplicationFiled: May 15, 2001Publication date: April 4, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura, Harafumi Mandai
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Publication number: 20020033743Abstract: In a dual-mode bandpass filter, a metal film is partially formed on one surface of a dielectric substrate or at a certain vertical level within the dielectric substrate, first and second input/output coupling circuits are coupled to the metal film, at least one capacitor is loaded to the metal film so that when an input signal is applied from either input/output coupling circuit, two resonant modes generated in the metal film are coupled. The capacitor preferably includes via-hole electrodes opposing the metal film.Type: ApplicationFiled: September 18, 2001Publication date: March 21, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Naoki Mizoguchi, Hisatake Okamura, Seiji Kamba
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Publication number: 20020030565Abstract: A band-pass filter includes a metal film provided on a dielectric body. The shape and size of the metal film and the coupling points of input-output coupling circuits are selected such that first and second resonance modes are generated. The metal film has protruding portions or concavities provided thereon such that resonance electric field strength in the first or second resonance mode is controlled to couple the first and second resonance modes to each other.Type: ApplicationFiled: May 15, 2001Publication date: March 14, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura, Harufumi Mandai
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Publication number: 20020005770Abstract: A dual-mode band-pass filter having a greatly reduced size and a high design flexibility, includes a frame-shaped electrode pattern disposed on one surface or inside a dielectric substrate. A pair of input-output circuits are coupled to the frame-shaped electrode pattern. The plane shape and the line-width of the frame-shaped electrode pattern are configured so that two generated resonance modes are coupled to each other.Type: ApplicationFiled: July 10, 2001Publication date: January 17, 2002Inventors: Naoki Mizoguchi, Hisatake Okamura, Seiji Kamba
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Publication number: 20010035804Abstract: A method of producing a band-pass filter includes selecting the shape of a metallic film and the connection points of input-output coupling circuits such that first and second resonance modes are generated in a metallic film provided on a dielectric substrate. At least a portion of the resonance current or the resonance electric field in at least one of the resonance modes is made discontinuous such that the first and second resonance modes are coupled.Type: ApplicationFiled: February 14, 2001Publication date: November 1, 2001Applicant: Murata Manufacturing Co., Ltd.Inventors: Seiji Kanba, Naoki Mizoguchi, Hisatake Okamura
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Publication number: 20010024151Abstract: A method for easily adjusting the frequency of an attenuation pole in a dual-mode band pass filter which is very compact and greatly increases coupling strength while maintaining a great deal of freedom of design. The dual-mode band pass filter includes a metal film partially disposed on a main surface of a dielectric substrate or disposed inside of the dielectric resonator so as to define a resonator. An opening is formed in the metal film to couple two resonance modes. Input/output coupling circuits are coupled to the metal film. At least one of coupling portions of the input/output coupling circuits or input/output portions thereof are moved in a direction along a perimeter of the metal film.Type: ApplicationFiled: March 14, 2001Publication date: September 27, 2001Inventors: Naoki Mizoguchi, Seiji Kanba, Hisatake Okamura