Patents by Inventor Takaya Wada

Takaya Wada 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: 20200321157
    Abstract: An electronic component includes a single-layer glass plate, an outer-surface conductor that is disposed above an outer surface of the single-layer glass plate and that is at least a part of an electrical element, and a terminal electrode that is a terminal of the electrical element. The terminal electrode is disposed above the outer surface of the single-layer glass plate and being electrically connected to the outer-surface conductor.
    Type: Application
    Filed: April 2, 2020
    Publication date: October 8, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Hiraku KAWAI, Noboru SHIOKAWA, Yuichi IIDA, Yoshitaka MATSUKI, Masahiro KUBOTA, Kenji NISHIYAMA, Takaya WADA, Tadashi WASHIMORI, Rikiya SANO, Chiharu SAKAKI
  • Patent number: 10742193
    Abstract: A filter includes a series-arm resonator located on a path that connects an input/output terminal (11m) with an input/output terminal (11n), and a first parallel-arm resonant circuit connected between a node, which is located on the path, and ground. The first parallel-arm resonant circuit includes a parallel-arm resonator, and a pair of a capacitor and a switch connected in parallel with each other and in series with the parallel-arm resonator between the parallel-arm resonator and ground. An interconnect line (a1) is connected to the input/output terminal (11m), and an interconnect line (a2) is connected to the input/output terminal. The parallel-arm resonator and the switch are connected by an interconnect line (a3). The interconnect line (a3) has a characteristic impedance lower than a characteristic impedance of the interconnect line (a1) or a characteristic impedance of the interconnect line (a2).
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: August 11, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takaya Wada, Koji Nosaka
  • Patent number: 10659007
    Abstract: A tunable filter includes a series-arm resonant circuit, and a parallel-arm resonant circuit. The series-arm resonant circuit includes a group of acoustic wave resonant circuits that have different resonant frequencies, a variable capacitor, and switching circuits. The parallel-arm resonant circuit includes another group of acoustic wave resonant circuits that have different resonant frequencies, a variable capacitor, and switching circuits. For example, the difference in pass-band frequency caused by the difference in resonant frequency between the acoustic wave resonant circuit in the group and the acoustic wave resonant circuit in the other group is greater than the maximum difference in pass-band frequency resulting from the variable range of capacitance of the variable capacitor.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: May 19, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takaya Wada, Koji Nosaka
  • Patent number: 10644673
    Abstract: A radio frequency filter circuit (22A) includes a series-arm resonator (22s), a parallel-arm resonator (22p1), a parallel-arm resonator (22p2) that is connected between a node x1 and a ground terminal, a switch (22SW) that is arranged between the node x1 and the ground terminal and switches between electrical connection and electrical non-connection of a path connecting the node x1, the parallel-arm resonator (22p2), and the ground terminal. The parallel-arm resonator (22p1) and a series circuit in which the parallel-arm resonator (22p2) and the switch (22SW) are connected in series are connected in parallel between the node x1 and the ground terminal. A resonant frequency (frp) of the parallel-arm resonator (22p1) is lower than a resonant frequency (frs) of the series-arm resonator (22s). A resonant frequency (frp2) of the parallel-arm resonator (22p2) is higher than the resonant frequency (frp) of the parallel-arm resonator (22p1).
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: May 5, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Koji Nosaka, Takaya Wada
  • Publication number: 20190214969
    Abstract: A filter includes a series-arm resonator located on a path that connects an input/output terminal (11m) with an input/output terminal (11n), and a first parallel-arm resonant circuit connected between a node, which is located on the path, and ground. The first parallel-arm resonant circuit includes a parallel-arm resonator, and a pair of a capacitor and a switch connected in parallel with each other and in series with the parallel-arm resonator between the parallel-arm resonator and ground. An interconnect line (a1) is connected to the input/output terminal (11m), and an interconnect line (a2) is connected to the input/output terminal. The parallel-arm resonator and the switch are connected by an interconnect line (a3). The interconnect line (a3) has a characteristic impedance lower than a characteristic impedance of the interconnect line (a1) or a characteristic impedance of the interconnect line (a2).
    Type: Application
    Filed: March 18, 2019
    Publication date: July 11, 2019
    Inventors: Takaya WADA, Koji NOSAKA
  • Publication number: 20190097606
    Abstract: A radio frequency filter circuit (22A) includes a series-arm resonator (22s), a parallel-arm resonator (22p1), a parallel-arm resonator (22p2) that is connected between a node x1 and a ground terminal, a switch (22SW) that is arranged between the node x1 and the ground terminal and switches between electrical connection and electrical non-connection of a path connecting the node x1, the parallel-arm resonator (22p2), and the ground terminal. The parallel-arm resonator (22p1) and a series circuit in which the parallel-arm resonator (22p2) and the switch (22SW) are connected in series are connected in parallel between the node x1 and the ground terminal. A resonant frequency (frp) of the parallel-arm resonator (22p1) is lower than a resonant frequency (frs) of the series-arm resonator (22s). A resonant frequency (frp2) of the parallel-arm resonator (22p2) is higher than the resonant frequency (frp) of the parallel-arm resonator (22p1).
    Type: Application
    Filed: August 7, 2018
    Publication date: March 28, 2019
    Inventors: Koji Nosaka, Takaya Wada
  • 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
  • Patent number: 10164585
    Abstract: A radio frequency filter includes communication bandpass filters disposed corresponding respectively to a plurality of communication bands, a switch, and a matching circuit. The switch includes a common terminal and a plurality of optionally selectable terminals, the plurality of optionally selectable terminals being individually connected to the plurality of bandpass filters in a one-to-one relation. The matching circuit is connected to the common terminal and is a common matching circuit to the plurality of communication bandpass filters. The plurality of communication bandpass filters are set such that filter characteristics of a serial circuit in combination of one of the plurality of communication bandpass filters, the one being selected by the switch, and the common matching circuit are improved in comparison with filter characteristics of the selected communication bandpass filter with respect to the communication band corresponding to the selected communication bandpass filter.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: December 25, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takaya Wada, Reiji Nakajima
  • Publication number: 20180234078
    Abstract: A tunable filter includes a series-arm resonant circuit, and a parallel-arm resonant circuit. The series-arm resonant circuit includes a group of acoustic wave resonant circuits that have different resonant frequencies, a variable capacitor, and switching circuits. The parallel-arm resonant circuit includes another group of acoustic wave resonant circuits that have different resonant frequencies, a variable capacitor, and switching circuits. For example, the difference in pass-band frequency caused by the difference in resonant frequency between the acoustic wave resonant circuit in the group and the acoustic wave resonant circuit in the other group is greater than the maximum difference in pass-band frequency resulting from the variable range of capacitance of the variable capacitor.
    Type: Application
    Filed: April 18, 2018
    Publication date: August 16, 2018
    Inventors: Takaya WADA, Koji NOSAKA
  • Patent number: 10027008
    Abstract: An irreversible circuit element includes first and second high pass isolators each including first and second center electrodes intersecting with and being insulated from each other on a ferrite to which a direct-current magnetic field is applied with a permanent magnet. One end of the first center electrode is an output port and the other end thereof is an input port, and one end of the second center electrode is another output port and the other end thereof is a ground port. A pass frequency band of the first isolator is higher than a pass frequency band of the second isolator. Respective output portions of the first and second isolators are electrically connected and defined as one output terminal, and a low pass filter LPF is inserted between the output terminal and the output port of the second isolator.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: July 17, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takaya Wada, Yoshiki Yamada
  • Patent number: 10009048
    Abstract: The present disclosure provides a high-frequency circuit including a matching circuit capable of adjusting the input/output impedance of a high-frequency device to an optimal value, even if the high-frequency device includes a circuit element whose input/output impedance varies upon the variation in the operating frequency, and provides a transmission and reception circuit including the high-frequency circuit. The high-frequency circuit includes a first high-frequency device, a second high-frequency device electrically connected to the first high-frequency device, and a matching circuit connected between the first high-frequency device 1 and the second high-frequency device. At least one of the first high-frequency device 1 and the second high-frequency device includes a variable device and has a changeable operating frequency.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: June 26, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Takaya Wada
  • Patent number: 9887684
    Abstract: An isolator includes a core isolator, a main substrate and a circuit-defining section. The main substrate includes a first wiring portion, a second wiring portion and a third wiring portion and has the core isolator and the circuit-defining section mounted thereon. An input port of the core isolator is connected to the first wiring portion. An output port of the core isolator is connected to the second wiring portion. A ground port of the core isolator is connected to the third wiring portion. In the circuit-defining section, a conductor pattern includes a capacitor that is connected in parallel with the core isolator via the first wiring portion and the second wiring portion, and an impedance element that is connected to at least either of the first wiring portion and the second wiring portion.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: February 6, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kazutaka Mukaiyama, Kenji Saito, Takaya Wada, Reiji Nakajima, Shingo Yanagihara
  • Publication number: 20170346452
    Abstract: A radio frequency filter includes communication bandpass filters disposed corresponding respectively to a plurality of communication bands, a switch, and a matching circuit. The switch includes a common terminal and a plurality of optionally selectable terminals, the plurality of optionally selectable terminals being individually connected to the plurality of bandpass filters in a one-to-one relation. The matching circuit is connected to the common terminal and is a common matching circuit to the plurality of communication bandpass filters. The plurality of communication bandpass filters are set such that filter characteristics of a serial circuit in combination of one of the plurality of communication bandpass filters, the one being selected by the switch, and the common matching circuit are improved in comparison with filter characteristics of the selected communication bandpass filter with respect to the communication band corresponding to the selected communication bandpass filter.
    Type: Application
    Filed: August 16, 2017
    Publication date: November 30, 2017
    Inventors: Takaya Wada, Reiji Nakajima
  • Publication number: 20170302317
    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: Application
    Filed: June 23, 2017
    Publication date: October 19, 2017
    Inventors: Atsushi Horita, Takaya Wada, Hirokazu Nakae
  • Patent number: 9787334
    Abstract: A high frequency power amplifier includes a first high frequency amplifier, a final high frequency amplifier, and a tunable filter. The tunable filter is connected between the first high frequency amplifier and the final high frequency amplifier. The first high frequency amplifier and the final high frequency amplifier are each a multimode/multiband power amplifier. The tunable filter is regulated such that its pass band includes the frequency band of a transmission signal and its attenuation band includes the frequency band of a reception signal in a communication band used in transmission and reception. The pass band and the attenuation band are switched by the tunable filter in accordance with the communication band used in transmission and reception.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: October 10, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hidenori Obiya, Hisao Hayafuji, Takaya Wada, Shinya Hitomi
  • Publication number: 20170279175
    Abstract: An irreversible circuit element includes first and second high pass isolators each including first and second center electrodes intersecting with and being insulated from each other on a ferrite to which a direct-current magnetic field is applied with a permanent magnet. One end of the first center electrode is an output port and the other end thereof is an input port, and one end of the second center electrode is another output port and the other end thereof is a ground port. A pass frequency band of the first isolator is higher than a pass frequency band of the second isolator. Respective output portions of the first and second isolators are electrically connected and defined as one output terminal, and a low pass filter LPF is inserted between the output terminal and the output port of the second isolator.
    Type: Application
    Filed: June 13, 2017
    Publication date: September 28, 2017
    Inventors: Takaya WADA, Yoshiki YAMADA
  • Patent number: 9748624
    Abstract: A non-reciprocal circuit element includes a ferrite, a first central electrode and a second central electrode that are arranged on the ferrite so as to cross each other in an insulated state, and a permanent magnet configured to apply a DC magnetic field to a portion where the first and second central electrodes cross each other. One end of the first central electrode defines an input port and the other end thereof defines an output port. One end of the second central electrode defines the input port and the other end thereof defines a ground port. A resistance element and a capacitance element which are connected in parallel with each other are connected in series between the input port and the output port. A switching capacitance unit configured to switch a capacitance is connected in parallel with the resistance element between the input port and the output port.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: August 29, 2017
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Takaya Wada
  • Patent number: 9711834
    Abstract: An irreversible circuit element includes first and second high pass isolators each including first and second center electrodes intersecting with and being insulated from each other on a ferrite to which a direct-current magnetic field is applied with a permanent magnet. One end of the first center electrode is an output port and the other end thereof is an input port, and one end of the second center electrode is another output port and the other end thereof is a ground port. A pass frequency band of the first isolator is higher than a pass frequency band of the second isolator. Respective output portions of the first and second isolators are electrically connected and defined as one output terminal, and a low pass filter LPF is inserted between the output terminal and the output port of the second isolator.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: July 18, 2017
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takaya Wada, Yoshiki Yamada
  • Patent number: 9705172
    Abstract: A non-reciprocal circuit element includes a ferrite, a first central electrode and a second central electrode arranged on the ferrite so as to cross each other in an insulated state, and a permanent magnet that applies a DC magnetic field to a portion where the first and second central electrodes cross each other. One end of the first central electrode defines an input port, and the other end thereof defines an output port. One end of the second central electrode defines the input port, and the other end thereof defines a ground port. A resistance element and a capacitance element, which are connected in parallel with each other, are connected in series with and between the input port and the output port. Input impedance is lowered by making inductance of the second central electrode relatively large.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: July 11, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takaya Wada, Reiji Nakajima
  • Publication number: 20160285482
    Abstract: The present disclosure provides a high-frequency circuit including a matching circuit capable of adjusting the input/output impedance of a high-frequency device to an optimal value, even if the high-frequency device includes a circuit element whose input/output impedance varies upon the variation in the operating frequency, and provides a transmission and reception circuit including the high-frequency circuit. The high-frequency circuit includes a first high-frequency device, a second high-frequency device electrically connected to the first high-frequency device, and a matching circuit connected between the first high-frequency device 1 and the second high-frequency device. At least one of the first high-frequency device 1 and the second high-frequency device includes a variable device and has a changeable operating frequency.
    Type: Application
    Filed: June 10, 2016
    Publication date: September 29, 2016
    Inventor: Takaya Wada