Patents by Inventor Masahiro Izawa
Masahiro Izawa 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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Publication number: 20230420833Abstract: An antenna module includes a main body, an antenna, and a shield electrode. The antenna includes an antenna electrode that covers a side surface of the main body. The shield electrode covers a top surface of the main body without being in contact with the antenna electrode. The main body includes a substrate, a plurality of electronic components and, a first dielectric layer, a second dielectric layer, at least one first ground connection electrode, and at least one second ground connection electrode. The electronic components and are mounted on the substrate. The first dielectric layer covers a first main surface of the substrate. The second dielectric layer covers a second main surface of the substrate. The at least one first ground connection electrode is in the form of a column extending through the first dielectric layer and connects the substrate to the shield electrode.Type: ApplicationFiled: June 2, 2023Publication date: December 28, 2023Inventor: Masahiro IZAWA
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Publication number: 20230387603Abstract: An antenna device includes: a ground electrode plate; one or more first radiating electrode plates which face the ground electrode plate; a second radiating electrode plate which lies between the ground electrode plate and the one or more first radiating electrode plates; one or more first feeder lines which are connected to the one or more first radiating electrode plates; a second feeder line which is not connected to the one or more first feeder lines but is connected to the second radiating electrode plate; and a ground line which does not connect the one or more first radiating electrode plates to the ground electrode plate but connects the second radiating electrode plate to the ground electrode plate. The one or more first radiating electrode plates lie inside the second radiating electrode plate as viewed from a thickness direction of the ground electrode plate.Type: ApplicationFiled: August 11, 2023Publication date: November 30, 2023Inventors: Ryo KOMURA, Masahiro IZAWA
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Publication number: 20230223690Abstract: An antenna module (10) includes a ground electrode (30) in which a slit (33) is formed in such a manner as to form an opening along a perimeter of the ground electrode, a first antenna (110) and a second antenna (110A) arranged in or on the ground electrode (30), and a coupling reducing electrode (200) connected to the ground electrode (30) within the slit (33). The slit (33) is formed on a path leading from the first antenna (110) to the second antenna (110A) along the perimeter of the ground electrode. The coupling reducing electrode (200) includes a first conductor (220) having a length corresponding to a first frequency and a second conductor (230) having a length corresponding to a second frequency, which is higher than the first frequency.Type: ApplicationFiled: March 15, 2023Publication date: July 13, 2023Inventors: Yasuo TANBO, Masahiro IZAWA
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Publication number: 20220416425Abstract: An element assembly has a structure in which insulator layers including first and second insulator layers are laminated in an up-down direction. The first insulator layer is above the second insulator layer. A radiant conductor layer is on an upper surface of the first insulator layer. A first capacitance defining portion includes a first interlayer connection conductor passing through one or more of the insulator layers in the up-down direction. The first interlayer connection conductor is electrically connected to the radiant conductor layer. The radiant conductor layer, a ground conductor, and the first capacitance defining portion define and function as a patch antenna. When the first interlayer connection conductor is electrically connected to the radiant conductor layer, a distance from a lower end of the first interlayer connection conductor to the ground conductor in the up-down direction is shorter than a distance from the radiant conductor layer to the ground conductor in the up-down direction.Type: ApplicationFiled: September 1, 2022Publication date: December 29, 2022Inventors: Koji KAMADA, Kunihiro KOMAKI, Masahiro IZAWA, Ryo KOMURA
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Publication number: 20220224015Abstract: An antenna unit includes a feed point, a first antenna conductor extending from the feed point and having a width that expands as a distance from the feed point increases, a second antenna conductor facing a top end edge of the first antenna conductor with a gap formed therebetween, a first connection part connecting the top end edge of the first antenna conductor and the second antenna conductor via a capacitor, and a second connection part connecting the top end edge of the first antenna conductor and the second antenna conductor via an inductor or a zero-ohm resistor. A first connection point between the first connection part and the first antenna conductor is closer to a center of the top end edge of the first antenna conductor compared with a second connection point between the second connection part and the first antenna conductor.Type: ApplicationFiled: March 31, 2022Publication date: July 14, 2022Inventors: Shota TAKI, Masahiro IZAWA, Yasuo TANBO
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Patent number: 11367963Abstract: A conductor pattern of an antenna device is provided in a notch and includes a common conductor, a first conductor, and a second conductor. A power supply unit is disposed at a connection portion between a conductor plate and the conductor pattern. Each of the first conductor and the second conductor is connected to the power supply unit with the common conductor interposed therebetween. The power supply unit is positioned at a position at which a distance to an opening end is shorter than a distance to a closed end at a side end. A first partial conductor of the first conductor is positioned between the second conductor and a side end. A length of the first conductor in a direction along the side end is longer than a length of the second conductor in the direction along the side end.Type: GrantFiled: August 24, 2020Date of Patent: June 21, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yasuo Tanbo, Masahiro Izawa
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Patent number: 11309641Abstract: An antenna (101) includes a grounded conductive foil (110) disposed on a module substrate (140), a first conductive foil (111), and a second conductive foil (112). The first conductive foil (111) and the second conductive foil (112) are disposed on the module substrate (140), are elongated, and do not overlap with the grounded conductive foil (110) in a plan view of the module substrate (140). The first conductive foil (111) has one end supplied with an antenna signal and the other end that is open. The second conductive foil (112) has one end connected to the grounded conductive foil (110) and the other end that is open. A wireless module (120) includes a circuit unit (130) including a communication circuit and provided to the module substrate (140) on which the antenna (101) is formed.Type: GrantFiled: January 18, 2019Date of Patent: April 19, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yuichi Ito, Masahiro Izawa, Masayuki Kobayashi, Nobumitsu Amachi
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Patent number: 11258171Abstract: An antenna includes a dielectric substrate, a radiating element, a parasitic element, and a ground conductor. The dielectric substrate has a plate-like shape having a top face and a back face opposite to each other. The radiating element is placed between the top face and the back face of the dielectric substrate and transmits and receives a radio frequency signal of a first frequency. The parasitic element is placed on the top face of the dielectric substrate and transmits and receives a radio frequency signal of a second frequency. The ground conductor is placed on the back face of the dielectric substrate. The second frequency is a lower frequency than the first frequency. The dielectric substrate has an electric field boundary plane that reflects a radio frequency signal of the second frequency at an intermediate position in a thickness direction orthogonal to the top face and the back face.Type: GrantFiled: December 5, 2019Date of Patent: February 22, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Masahiro Izawa, Yoshiki Yamada
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Patent number: 11101561Abstract: A dual band compatible antenna device includes a first branch electrode having a first electrode portion connected to a common electrode with a first adjustment element interposed between the first electrode portion and the common electrode and a second branch electrode having a second electrode portion connected to the common electrode with a second adjustment element interposed between the second electrode portion and the common electrode. The first electrode portion and the second electrode portion are provided on a line to have a length equal to or longer than ? of an electrical length of the first branch electrode and the second branch electrode.Type: GrantFiled: March 6, 2020Date of Patent: August 24, 2021Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Masahiro Izawa
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Patent number: 10965018Abstract: A first ground conductor is disposed in or on a main substrate. In or on an antenna module, a first antenna and a second ground conductor operating as a ground electrode of the first antenna are disposed. A coaxial cable including a core wire and an outer conductor feeds power to the first antenna. The outer conductor is electrically connected to the first ground conductor at a first position, and is connected to the second ground conductor at a second position. A second antenna including a feed element and a parasitic element operates at a lower frequency than the operating frequency of the first antenna. The second ground conductor and a part of the outer conductor from the first position to the second position also serve as the parasitic element of the second antenna.Type: GrantFiled: April 13, 2018Date of Patent: March 30, 2021Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Masahiro Izawa
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Publication number: 20200388925Abstract: A conductor pattern of an antenna device is provided in a notch and includes a common conductor, a first conductor, and a second conductor. A power supply unit is disposed at a connection portion between a conductor plate and the conductor pattern. Each of the first conductor and the second conductor is connected to the power supply unit with the common conductor interposed therebetween. The power supply unit is positioned at a position at which a distance to an opening end is shorter than a distance to a closed end at a side end. A first partial conductor of the first conductor is positioned between the second conductor and a side end. A length of the first conductor in a direction along the side end is longer than a length of the second conductor in the direction along the side end.Type: ApplicationFiled: August 24, 2020Publication date: December 10, 2020Inventors: Yasuo TANBO, Masahiro IZAWA
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Publication number: 20200212570Abstract: A dual band compatible antenna device includes a first branch electrode having a first electrode portion connected to a common electrode with a first adjustment element interposed between the first electrode portion and the common electrode and a second branch electrode having a second electrode portion connected to the common electrode with a second adjustment element interposed between the second electrode portion and the common electrode. The first electrode portion and the second electrode portion are provided on a line to have a length equal to or longer than ? of an electrical length of the first branch electrode and the second branch electrode.Type: ApplicationFiled: March 6, 2020Publication date: July 2, 2020Inventor: Masahiro IZAWA
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Publication number: 20200106179Abstract: An antenna includes a dielectric substrate, a radiating element, a parasitic element, and a ground conductor. The dielectric substrate has a plate-like shape having a top face and a back face opposite to each other. The radiating element is placed between the top face and the back face of the dielectric substrate and transmits and receives a radio frequency signal of a first frequency. The parasitic element is placed on the top face of the dielectric substrate and transmits and receives a radio frequency signal of a second frequency. The ground conductor is placed on the back face of the dielectric substrate. The second frequency is a lower frequency than the first frequency. The dielectric substrate has an electric field boundary plane that reflects a radio frequency signal of the second frequency at an intermediate position in a thickness direction orthogonal to the top face and the back face.Type: ApplicationFiled: December 5, 2019Publication date: April 2, 2020Inventors: Masahiro IZAWA, Yoshiki YAMADA
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Patent number: 10530067Abstract: An antenna element includes an antenna board, a radiation conductor including radiation portions including a top surface portion and being divided at positions corresponding to frequency bands and provided with respect to a first feeding point in plan view of the antenna board, through-conductors penetrating the antenna board at respective positions of end portions of the top surface portion in a thickness direction, and bottom surface electrodes provided on a bottom surface of the antenna board opposite the end portions of the top surface portion, and connected to the top surface portion via the through-conductors.Type: GrantFiled: June 8, 2018Date of Patent: January 7, 2020Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takayuki Horibe, Nobumitsu Amachi, Masayuki Kobayashi, Masahiro Izawa
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Patent number: 10418701Abstract: An antenna device including a ground conductor and first and second antennas. The first and second antennas are linear antennas and have respective feeding points at ends on a side of the ground conductor. The first and second antennas perform transmission/reception at first and second frequencies that are adjacent to each other, respectively. Moreover, the first antenna includes a first monopole antenna and a loop antenna branched off from the first monopole antenna. An end of the loop antenna opposing a branching point at which the loop antenna is branched off from the first monopole antenna is short-circuited between the feeding points of the first and second antennas on the ground conductor.Type: GrantFiled: February 22, 2018Date of Patent: September 17, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Masahiro Izawa
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Publication number: 20190157773Abstract: An antenna (101) includes a grounded conductive foil (110) disposed on a module substrate (140), a first conductive foil (111), and a second conductive foil (112). The first conductive foil (111) and the second conductive foil (112) are disposed on the module substrate (140), are elongated, and do not overlap with the grounded conductive foil (110) in a plan view of the module substrate (140). The first conductive foil (111) has one end supplied with an antenna signal and the other end that is open. The second conductive foil (112) has one end connected to the grounded conductive foil (110) and the other end that is open. A wireless module (120) includes a circuit unit (130) including a communication circuit and provided to the module substrate (140) on which the antenna (101) is formed.Type: ApplicationFiled: January 18, 2019Publication date: May 23, 2019Inventors: Yuichi ITO, Masahiro IZAWA, Masayuki KOBAYASHI, Nobumitsu AMACHI
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Publication number: 20180294580Abstract: An antenna element includes an antenna board, a radiation conductor including radiation portions including a top surface portion and being divided at positions corresponding to frequency bands and provided with respect to a first feeding point in plan view of the antenna board, through-conductors penetrating the antenna board at respective positions of end portions of the top surface portion in a thickness direction, and bottom surface electrodes provided on a bottom surface of the antenna board opposite the end portions of the top surface portion, and connected to the top surface portion via the through-conductors.Type: ApplicationFiled: June 8, 2018Publication date: October 11, 2018Inventors: Takayuki HORIBE, Nobumitsu AMACHI, Masayuki KOBAYASHI, Masahiro IZAWA
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Publication number: 20180233817Abstract: A first ground conductor is disposed in or on a main substrate. In or on an antenna module, a first antenna and a second ground conductor operating as a ground electrode of the first antenna are disposed. A coaxial cable including a core wire and an outer conductor feeds power to the first antenna. The outer conductor is electrically connected to the first ground conductor at a first position, and is connected to the second ground conductor at a second position. A second antenna including a feed element and a parasitic element operates at a lower frequency than the operating frequency of the first antenna. The second ground conductor and a part of the outer conductor from the first position to the second position also serve as the parasitic element of the second antenna.Type: ApplicationFiled: April 13, 2018Publication date: August 16, 2018Inventor: Masahiro IZAWA
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Publication number: 20180183145Abstract: An antenna device including a ground conductor and first and second antennas. The first and second antennas are linear antennas and have respective feeding points at ends on a side of the ground conductor. The first and second antennas perform transmission/reception at first and second frequencies that are adjacent to each other, respectively. Moreover, the first antenna includes a first monopole antenna and a loop antenna branched off from the first monopole antenna. An end of the loop antenna opposing a branching point at which the loop antenna is branched off from the first monopole antenna is short-circuited between the feeding points of the first and second antennas on the ground conductor.Type: ApplicationFiled: February 22, 2018Publication date: June 28, 2018Inventor: Masahiro Izawa
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Patent number: 9780441Abstract: This disclosure provides an antenna and a wireless communication device that includes the antenna in which a high-order mode can be controlled while maintaining good radiation characteristics in both the fundamental mode and high-order mode. The antenna has a radiation electrode provided on a surface of a dielectric substrate and a branch electrode portion that branches from the radiation electrode portion at a branch point near the feeding port toward a vicinity of a position of the radiation electrode at which a maximum voltage of a high-order mode is generated.Type: GrantFiled: August 13, 2012Date of Patent: October 3, 2017Assignee: Murata Manufacturing Co., Ltd.Inventors: Kunihiro Komaki, Masayuki Atokawa, Masahiro Izawa, Yuji Kaminishi, Tsuyoshi Mukai