Patents by Inventor Yuichi Takamine

Yuichi Takamine 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).

  • Patent number: 11394369
    Abstract: A multiplexer includes elastic wave filters with different pass bands, a common terminal to which an inductance element is serially connected in a connection path between an antenna element and the common terminal; and an inductance element. Among the elastic wave filters, a reception input terminal of a first reception filter is connected to the common terminal via the inductance element and is connected to a parallel resonator. Transmission output terminals of transmission filters and a reception input terminal of a second reception filter are connected to the common terminal, are connected to series resonators, and are not connected to parallel resonators.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: July 19, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuichi Takamine
  • Patent number: 11271546
    Abstract: A filter circuit has a first frequency band as a pass band and a second frequency band as an attenuation band. The filter circuit includes a 90-degree hybrid coupler, a first filter that is connected to the 90-degree hybrid coupler and has the first frequency band as a pass band, and a second filter that is connected to the 90-degree hybrid coupler and has the second frequency band as a pass band. The second filter includes a first inductor, a resonant circuit, and a second inductor connected in series in this order, a first capacitive element connected between a node on a signal path connecting the first inductor and the resonant circuit and a ground electrode, and a second capacitive element connected between a node on a signal path connecting the second inductor and the resonant circuit and a ground electrode.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: March 8, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuichi Takamine
  • Patent number: 11218134
    Abstract: An acoustic wave filter device includes a plurality of acoustic wave resonators. Each of the acoustic wave resonators includes a piezoelectric layer and an IDT electrode provided on the piezoelectric layer. On a surface opposite to a surface of the piezoelectric layer on which the IDT electrode is provided, a low-acoustic-velocity film and a substrate made of a semiconductor are stacked. A routing line electrically connected to an antenna terminal is provided on an insulating film provided on the piezoelectric layer.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: January 4, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuichi Takamine
  • Patent number: 11115003
    Abstract: In an acoustic wave device, an antenna end resonator electrically closest to a first terminal is a first acoustic wave resonator. In each of the first acoustic wave resonator and a second acoustic wave resonator, a thickness of a piezoelectric layer is equal to or less than about 3.5?. A cut angle of the piezoelectric layer of the first acoustic wave resonator is within a range of ?B±4°. The cut angle of the piezoelectric layer of the second acoustic wave resonator has a larger difference from ?B (°) than the cut angle of the piezoelectric layer of the first acoustic wave resonator.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: September 7, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Ryo Nakagawa, Hideki Iwamoto, Tsutomu Takai, Yuichi Takamine
  • Patent number: 11012052
    Abstract: A longitudinally coupled resonator type surface acoustic wave filter includes a high-acoustic-velocity member, a low-acoustic-velocity film provided on the high-acoustic-velocity member, a piezoelectric film provided on the low-acoustic-velocity film, a plurality of interdigital transducers provided on the piezoelectric film and along a propagation direction of a surface acoustic wave and each including a plurality of electrode fingers, and reflectors arranged such that the interdigital transducers are interposed therebetween from both sides in the propagation direction of the surface acoustic wave. An electrode finger pitch is uniform or substantially uniform in each of the interdigital transducers. When a wavelength determined by the electrode finger pitch in the reflector is defined as ?, an inter-electrode finger center distance that is an interval between each of the interdigital transducers and the interdigital transducer adjacent thereto is not shorter than about 0.25? and not longer than about 0.37?.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: May 18, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuichi Takamine
  • Publication number: 20210143791
    Abstract: A filter includes an additional circuit including first and second IDT electrode groups connected in multiple stages between first and second input/output terminals, the first IDT electrode group includes first and second IDT electrodes side by side in a propagation direction of an acoustic wave, and the second IDT electrode group includes third and fourth IDT electrodes side by side in the propagation direction. One end of each of the first and second IDT electrodes is respectively connected to the first and second input/output terminals. Other ends of the first and second IDT electrodes are connected in common and to a ground. One ends of the third and fourth IDT electrodes are connected in common. Other ends of the third and fourth IDT electrodes are connected in common. The additional circuit is connected in parallel with at least a portion of a filter circuit.
    Type: Application
    Filed: January 19, 2021
    Publication date: May 13, 2021
    Inventor: Yuichi TAKAMINE
  • Patent number: 10972072
    Abstract: A composite multiplexer includes a first multiplexer, a second multiplexer, and a second LC circuit. The first multiplexer includes first band pass filter circuits and first LC circuits connected to end portions of the first band pass filter circuits that are opposite to a first terminal, respectively. The second multiplexer includes second band pass filter circuits. The second LC circuit is connected between the first terminal and the second multiplexer.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: April 6, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuichi Takamine
  • Patent number: 10917071
    Abstract: A quadplexer includes a first filter and a second filter whose passband has frequencies higher than the first filter. The first filter has a ladder filter structure including series resonators disposed on a first path and parallel resonators disposed on a path connecting the first path and ground. A series resonator that is closest to a common terminal among the series resonators includes an IDT electrode that excites elastic waves, and a reflector that reflects the elastic waves excited by the IDT electrode. A distance between the IDT electrode and the reflector is greater than or equal to about 0.44? and less than about 0.5? where ? is a wavelength of the elastic waves that is defined by an electrode cycle of the IDT electrode.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: February 9, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuichi Takamine
  • Patent number: 10840877
    Abstract: A composite filter device includes a common terminal disposed on an element substrate including a piezoelectric layer, first and second band pass filters disposed on the element substrate, and connected at one end thereof to the common terminal, a shield electrode interposed between a signal line and the first band pass filter, the signal line being disposed on the element substrate and connecting the common terminal to the first and second band pass filters, and an inductor connected between the shield electrode and a reference potential line.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: November 17, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuichi Takamine
  • Publication number: 20200336133
    Abstract: In an acoustic wave device, an antenna end resonator electrically closest to a first terminal is a first acoustic wave resonator. In each of the first acoustic wave resonator and a second acoustic wave resonator, a thickness of a piezoelectric layer is equal to or less than about 3.5?. A cut angle of the piezoelectric layer of the first acoustic wave resonator is within a range of ?B±4°. The cut angle of the piezoelectric layer of the second acoustic wave resonator has a larger difference from ?B (°) than the cut angle of the piezoelectric layer of the first acoustic wave resonator.
    Type: Application
    Filed: July 6, 2020
    Publication date: October 22, 2020
    Inventors: Ryo NAKAGAWA, Hideki IWAMOTO, Tsutomu TAKAI, Yuichi TAKAMINE
  • Patent number: 10812050
    Abstract: A multiplexer includes a first reception-side filter and a second reception-side filter whose passband has frequencies higher than the first reception-side filter. The first reception-side filter includes a series arm resonator provided on a first path, and parallel arm resonators provided on a path electrically connecting the first path and ground. A direction connecting tips of a plurality of electrode fingers included in each resonator crosses an elastic wave propagating direction at a certain angle. The parallel arm resonator closest to a common connection terminal does not include third electrode fingers, and the other parallel arm resonators include third electrode fingers.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: October 20, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuichi Takamine
  • Patent number: 10812043
    Abstract: An acoustic wave filter device includes a first band pass filter including a first acoustic wave resonator connected between an antenna terminal and a first signal terminal and having a first pass band, and a second band pass filter connected with the antenna terminal and having a second pass band on a higher side of the first pass band. The first acoustic wave resonator includes a substrate on a surface of which a piezoelectric thin film is provided, an IDT electrode provided on the substrate, and reflectors. At least a pitch of some electrode fingers is different from a pitch of other electrode fingers in at least one of the IDT electrode and the reflectors of the first acoustic wave resonator on a side closest to the antenna terminal.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: October 20, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuichi Takamine
  • Patent number: 10778187
    Abstract: A filter includes a LiTaO3 piezoelectric layer having a cut angle, a high acoustic velocity support substrate, a low acoustic velocity film, and an IDT electrode. A cut angle ?B of the piezoelectric layer at which a Rayleigh wave spurious response is locally reduced or minimized is determined from a wavelength of the IDT electrode, a film thickness of the IDT electrode, a specific gravity of the IDT electrode, an electrode duty, a thickness of the piezoelectric layer, and a film thickness of the low acoustic velocity film. The Cut angle of the piezoelectric layer satisfies a relationship of ?B?4????B+4.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: September 15, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Yuichi Takamine, Hideki Iwamoto
  • Publication number: 20200280303
    Abstract: A multiplexer includes a transmission-side filter electrically connected to a common terminal and a transmission input terminal, and a transmission-side filter electrically connected to the common terminal and a transmission input terminal. The transmission-side filter includes a plurality of series arm resonators and a plurality of parallel arm resonators. Capacitance elements are respectively electrically connected in parallel to the series arm resonator and the parallel arm resonator, which are connected most proximately to the common terminal. IDT electrodes of a series arm resonator and a parallel arm resonator connected most proximately to the common terminal do not include a thinning electrode, and others of the series arm resonators and the parallel arm resonators include thinning electrodes.
    Type: Application
    Filed: May 15, 2020
    Publication date: September 3, 2020
    Inventor: Yuichi TAKAMINE
  • Patent number: 10742194
    Abstract: A filter includes n series resonators, one or more parallel resonators, a first inductor between a first terminal and a first of the n series resonators, and a second inductor between an n-th series resonator and a second terminal. Where a resonant frequency of the first series resonator is referred to as a first resonant frequency, a resonant frequency of each of the series resonators other than the first series resonator and the n-th series resonator is referred to as a second resonant frequency, and a resonant frequency of the n-th series resonator is referred to as a third resonant frequency, the first resonant frequency and the third resonant frequency are each higher than the second resonant frequency.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: August 11, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuichi Takamine
  • Publication number: 20200195229
    Abstract: A filter circuit has a first frequency band as a pass band and a second frequency band as an attenuation band. The filter circuit includes a 90-degree hybrid coupler, a first filter that is connected to the 90-degree hybrid coupler and has the first frequency band as a pass band, and a second filter that is connected to the 90-degree hybrid coupler and has the second frequency band as a pass band. The second filter includes a first inductor, a resonant circuit, and a second inductor connected in series in this order, a first capacitive element connected between a node on a signal path connecting the first inductor and the resonant circuit and a ground electrode, and a second capacitive element connected between a node on a signal path connecting the second inductor and the resonant circuit and a ground electrode.
    Type: Application
    Filed: November 5, 2019
    Publication date: June 18, 2020
    Inventor: Yuichi TAKAMINE
  • Publication number: 20200195228
    Abstract: A multiplexer includes filters and a common terminal connected to an antenna element by a connection path, a first inductance element being connected between the connection path and a reference terminal. A terminal closer to the antenna element among an input terminal and an output terminal of one filter among the filters is connected to a parallel resonator and is connected to the common terminal with a second inductance element interposed therebetween. A terminal closer to the antenna element among an input terminal and an output terminal of each of other filters other than the one filter among the filters is connected to the common terminal and a series resonator.
    Type: Application
    Filed: February 24, 2020
    Publication date: June 18, 2020
    Inventors: Yuichi TAKAMINE, Toshimaro YONEDA, Noriyoshi OTA
  • Publication number: 20200195227
    Abstract: An acoustic wave filter device includes a plurality of acoustic wave resonators. Each of the acoustic wave resonators includes a piezoelectric layer and an IDT electrode provided on the piezoelectric layer. On a surface opposite to a surface of the piezoelectric layer on which the IDT electrode is provided, a low-acoustic-velocity film and a substrate made of a semiconductor are stacked. A routing line electrically connected to an antenna terminal is provided on an insulating film provided on the piezoelectric layer.
    Type: Application
    Filed: February 26, 2020
    Publication date: June 18, 2020
    Inventor: Yuichi TAKAMINE
  • Publication number: 20200186127
    Abstract: A filter device includes a substrate having piezoelectricity, a first filter including an IDT electrode disposed on the substrate, a terminal electrode disposed on the substrate, a first wiring electrode disposed on the substrate and connecting the first filter and a terminal electrode, and a dielectric film disposed above the substrate to cover the IDT electrode. At least a portion of the first wiring electrode is not covered with the dielectric film.
    Type: Application
    Filed: February 19, 2020
    Publication date: June 11, 2020
    Inventor: Yuichi TAKAMINE
  • Publication number: 20200153414
    Abstract: A multiplexer includes a first reception-side filter and a second reception-side filter whose passband has frequencies higher than the first reception-side filter. The first reception-side filter includes a series arm resonator provided on a first path, and parallel arm resonators provided on a path electrically connecting the first path and ground. A direction connecting tips of a plurality of electrode fingers included in each resonator crosses an elastic wave propagating direction at a certain angle. The parallel arm resonator closest to a common connection terminal does not include third electrode fingers, and the other parallel arm resonators include third electrode fingers.
    Type: Application
    Filed: January 17, 2020
    Publication date: May 14, 2020
    Inventor: Yuichi TAKAMINE