Patents by Inventor Atsushi HORITA

Atsushi HORITA 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).

  • Publication number: 20210184705
    Abstract: A front-end module includes a substrate, and a circuit that is provided in or on the substrate, wherein the circuit includes a first filter to filter a high-frequency signal, a first low noise amplifier (LNA) to amplify a signal filtered by the first filter, a first inductor disposed between the first filter and the first LNA, a second filter to filter the high-frequency signal, a second LNA to amplify a signal filtered by the second filter, and a second inductor disposed between the second filter and the second LNA, and a coil axis of the first inductor and a coil axis of the second inductor are perpendicular or substantially perpendicular to each other.
    Type: Application
    Filed: February 26, 2021
    Publication date: June 17, 2021
    Inventor: Atsushi HORITA
  • Publication number: 20210152200
    Abstract: A radio frequency module includes: a module substrate; a first circuit component disposed on a first principal surface of the module substrate; and a second circuit component stacked on the first circuit component. Here, one of the first circuit component and the second circuit component includes a reception filter, the other of the first circuit component and the second circuit component includes a switch connected between an antenna connection terminal and the reception filter, and the second circuit component is connected to the first circuit component via a via electrode in the first circuit component or a side wiring on a side surface of the first circuit component.
    Type: Application
    Filed: November 3, 2020
    Publication date: May 20, 2021
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventor: Atsushi HORITA
  • Publication number: 20210135693
    Abstract: A radio frequency module includes a mounting board, a low noise amplifier, a reception filter, and an input matching circuit. The low noise amplifier is mounted on the mounting board. The reception filter is connected to the low noise amplifier. The input matching circuit is provided on a signal path between the reception filter and the low noise amplifier. The input matching circuit includes at least one inductor. The reception filter is disposed on the low noise amplifier. The at least one inductor included in the input matching circuit is adjacent to the low noise amplifier such that no other circuit element is present between the low noise amplifier and the at least one inductor.
    Type: Application
    Filed: October 21, 2020
    Publication date: May 6, 2021
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsushi HORITA
  • Patent number: 10965326
    Abstract: A front-end module includes a substrate, and a receiving circuit that is provided in or on the substrate and in which CA is executed. The receiving circuit includes a first filter, a first inductor, and a first LNA disposed on a first path, and a second filter, a second inductor, and a second LNA disposed on a second path. A coil axis of the first inductor and a coil axis of the second inductor are different from each other.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: March 30, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Atsushi Horita
  • Patent number: 10819310
    Abstract: A filter (11) includes a series-arm circuit (10) connected between an input/output terminal (11m) and an input/output terminal (11n); and a parallel-arm circuit (20) connected between a ground and a path that connects the input/output terminal (11m) and the input/output terminal (11n). One circuit among the series-arm circuit (10) and the parallel-arm circuit (20) is constituted by a parallel-arm resonator (p1) and a parallel-arm resonator (p2) that are connected in parallel to each other and that are connected to a node (x1) on the path. The parallel-arm resonators (p1) and (p2) form a pass band, together with another circuit among the series-arm circuit (10) and the parallel-arm circuit (20). The parallel-arm resonator (p2) has a resonant frequency lower than a resonant frequency of the parallel-arm resonator (p1) and has an impedance higher than an impedance of the parallel-arm resonator (p1).
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: October 27, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Atsushi Horita, Koji Nosaka
  • Patent number: 10715110
    Abstract: An acoustic wave filter device includes a first resonant circuit, a second resonant circuit, a first interconnect line, and a second interconnect line. The second resonant circuit includes a second parallel-arm resonator, and a frequency-tuning circuit that allows tuning of the resonant frequency of the second parallel-arm resonator. The frequency-tuning circuit includes a capacitor, and a switching element connected in parallel with the capacitor. The first interconnect line is an interconnect line connected to the portion of the series-arm resonator located adjacent to the first input/output terminal. The second interconnect line is an interconnect line connecting the parallel-arm resonator with the switching element, or an interconnect line connecting the parallel-arm resonator with the capacitor. A first transmission line formed by the first interconnect line, and a second transmission line formed by the second interconnect line are magnetically coupled with each other.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: July 14, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Atsushi Horita, Koji Nosaka
  • Publication number: 20200145028
    Abstract: A front-end module includes a substrate, and a receiving circuit that is provided in or on the substrate and in which CA is executed. The receiving circuit includes a first filter, a first inductor, and a first LNA disposed on a first path, and a second filter, a second inductor, and a second LNA disposed on a second path. A coil axis of the first inductor and a coil axis of the second inductor are different from each other.
    Type: Application
    Filed: January 2, 2020
    Publication date: May 7, 2020
    Inventor: Atsushi HORITA
  • Patent number: 10560131
    Abstract: A front-end module includes a substrate, and a receiving circuit that is provided in or on the substrate and in which CA is executed. The receiving circuit includes a first filter, a first inductor, and a first LNA disposed on a first path, and a second filter, a second inductor, and a second LNA disposed on a second path. A coil axis of the first inductor and a coil axis of the second inductor are different from each other.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: February 11, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Atsushi Horita
  • Patent number: 10547337
    Abstract: A radio frequency front-end circuit performs, in a communication band made up of a plurality of communication channels within a particular frequency band used in a system, wireless communication through a use channel selected from among empty communication channels in the plurality of communication channels, the radio frequency front-end circuit including a transmission-side amplifier circuit and a transmission circuit both serving as a transmission-side circuit that produces, from a transmitted signal after being subjected to a predistortion process, a transmitted signal corresponding to the use channel, and a frequency variable filter serving as a tunable filter that attenuates a radio frequency signal of a spurious wave at least in an alternate adjacent channel relative to the use channel.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: January 28, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Atsushi Horita, Hirotsugu Mori
  • Patent number: 10491250
    Abstract: A high-frequency front end circuit includes a fixed frequency filter and an interference-wave suppression variable filter. The fixed frequency filter attenuates a high-frequency signal outside a specific frequency band. The interference-wave suppression variable filter attenuates a high-frequency signal in at least one used communication channel, among used communication channels that are used by a system and that causes an interference wave occurring in a neighbor frequency domain including a wireless communication channel.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: November 26, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Atsushi Horita
  • Patent number: 10476535
    Abstract: A high-frequency front end circuit includes a frequency fixed filter and frequency variable LC filters, and these are connected in series in a signal transmission path. The frequency fixed filter transmits high-frequency signals in a frequency band of a communication band and attenuates high-frequency signals outside the frequency band of the communication band. One of the frequency variable LC filters is an LC filter and attenuates unnecessary wave frequencies in the frequency band of the communication band. Another one of the frequency variable filters is a resonator filter that passes high-frequency signals in a frequency band of a selected channel and attenuates high-frequency signals in frequency bands of adjacent communication channels of the selected channel.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: November 12, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hidenori Obiya, Atsushi Horita, Hirotsugu Mori
  • Publication number: 20190326938
    Abstract: A front-end module includes a substrate, and a receiving circuit that is provided in or on the substrate and in which CA is executed. The receiving circuit includes a first filter, a first inductor, and a first LNA disposed on a first path, and a second filter, a second inductor, and a second LNA disposed on a second path. A coil axis of the first inductor and a coil axis of the second inductor are different from each other.
    Type: Application
    Filed: April 9, 2019
    Publication date: October 24, 2019
    Inventor: Atsushi HORITA
  • Publication number: 20190214970
    Abstract: An acoustic wave filter device includes a first resonant circuit, a second resonant circuit, a first interconnect line, and a second interconnect line. The second resonant circuit includes a second parallel-arm resonator, and a frequency-tuning circuit that allows tuning of the resonant frequency of the second parallel-arm resonator. The frequency-tuning circuit includes a capacitor, and a switching element connected in parallel with the capacitor. The first interconnect line is an interconnect line connected to the portion of the series-arm resonator located adjacent to the first input/output terminal. The second interconnect line is an interconnect line connecting the parallel-arm resonator with the switching element, or an interconnect line connecting the parallel-arm resonator with the capacitor. A first transmission line formed by the first interconnect line, and a second transmission line formed by the second interconnect line are magnetically coupled with each other.
    Type: Application
    Filed: March 15, 2019
    Publication date: July 11, 2019
    Inventors: Atsushi HORITA, Koji NOSAKA
  • Patent number: 10340874
    Abstract: A filter circuit is provided which allows the pass band to be tuned to a desired communication signal while achieving increased attenuation in a given frequency band that lies outside the pass band. A filter circuit includes a fixed filter and a tunable filter. The fixed filter has a pass band wider than a frequency band corresponding to a predetermined communication signal and overlapping with the frequency band corresponding to the communication signal. The tunable filter has a stop band narrower than the pass band of the fixed filter and having tunable frequency. The fixed filter and the tunable filter are connected in series.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: July 2, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Atsushi Horita
  • Publication number: 20190158062
    Abstract: A filter (11) includes a series-arm circuit (10) connected between an input/output terminal (11m) and an input/output terminal (11n); and a parallel-arm circuit (20) connected between a ground and a path that connects the input/output terminal (11m) and the input/output terminal (11n). One circuit among the series-arm circuit (10) and the parallel-arm circuit (20) is constituted by a parallel-arm resonator (p1) and a parallel-arm resonator (p2) that are connected in parallel to each other and that are connected to a node (x1) on the path. The parallel-arm resonators (p1) and (p2) form a pass band, together with another circuit among the series-arm circuit (10) and the parallel-arm circuit (20). The parallel-arm resonator (p2) has a resonant frequency lower than a resonant frequency of the parallel-arm resonator (p1) and has an impedance higher than an impedance of the parallel-arm resonator (p1).
    Type: Application
    Filed: January 18, 2019
    Publication date: May 23, 2019
    Inventors: Atsushi HORITA, Koji NOSAKA
  • Patent number: 10277200
    Abstract: An attenuator includes a first high frequency signal input-output terminal and a second high frequency signal input-output terminal, a switch circuit, a plurality of resistors, and a variable capacitor. The plurality of resistors are respectively connected to the first high frequency signal input-output terminal while the resistors being parallel to each other. The switch circuit includes a plurality of selection target terminals respectively connected to the resistors and a shared terminal to which the plurality of selection target terminals are selectively connected and which is connected to the second high frequency signal input-output terminal. The variable capacitor is connected to one of the resistors in series and is so constituted as to have not a diode structure.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: April 30, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Atsushi Horita
  • Patent number: 10236925
    Abstract: A front-end circuit includes an antenna terminal, front-end terminals (Pfe1, Pfe2), a circulator, and frequency-variable filters. The circulator sends transmission signals of communication bands of a frequency division duplex system and a time division duplex system from the front-end terminal (Pfe1) to the antenna terminal. The circulator sends a reception signal from the antenna terminal to the front-end terminal (Pfe2). The frequency-variable filter is connected between the front-end terminal (Pfe1) and the circulator, passes transmission signals of the frequency division duplex system and the time division duplex system, and attenuates signals other than the above transmission signals. The frequency-variable filter is connected between the circulator and the front-end terminal (Pfe2), passes a reception signal of the frequency division duplex system, and attenuates signals other than the above reception signal.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: March 19, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Atsushi Horita, Takaya Wada, Hirokazu Nakae
  • Publication number: 20180331703
    Abstract: A radio frequency front-end circuit performs, in a communication band made up of a plurality of communication channels within a particular frequency band used in a system, wireless communication through a use channel selected from among empty communication channels in the plurality of communication channels, the radio frequency front-end circuit including a transmission-side amplifier circuit and a transmission circuit both serving as a transmission-side circuit that produces, from a transmitted signal after being subjected to a predistortion process, a transmitted signal corresponding to the use channel, and a frequency variable filter serving as a tunable filter that attenuates a radio frequency signal of a spurious wave at least in an alternate adjacent channel relative to the use channel.
    Type: Application
    Filed: July 25, 2018
    Publication date: November 15, 2018
    Inventors: Atsushi Horita, Hirotsugu Mori
  • Patent number: 10103706
    Abstract: A transmission and reception device includes a control unit, an antenna duplexer, a transmission circuit, a reception circuit, a detection unit, an antenna matching circuit, and a load adjustment circuit. The detection unit is connected to an antenna side of the antenna duplexer. The detection unit detects a reflection signal generated as a transmission signal is reflected by the antenna. The control unit adjusts element values of a capacitor a resistance constituting the load adjustment circuit on the basis of the detected reflection signal. The load adjustment circuit is connected to the antenna duplexer. By adjusting the element value of the load adjustment circuit, the impedance of the antenna duplexer is adjusted and the impedance between the antenna and the antenna duplexer is matched.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: October 16, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hidenori Obiya, Atsushi Horita
  • Publication number: 20180241367
    Abstract: A high-frequency front end circuit includes a fixed frequency filter and an interference-wave suppression variable filter. The fixed frequency filter attenuates a high-frequency signal outside a specific frequency band. The interference-wave suppression variable filter attenuates a high-frequency signal in at least one used communication channel, among used communication channels that are used by a system and that causes an interference wave occurring in a neighbor frequency domain including a wireless communication channel.
    Type: Application
    Filed: April 18, 2018
    Publication date: August 23, 2018
    Inventor: Atsushi HORITA