Patents by Inventor Yuji KOMATSUZAKI

Yuji KOMATSUZAKI 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: 20210083627
    Abstract: An apparatus includes an envelope detecting unit for detecting an envelope of a signal to be amplified, and a variable power supply applies, to an output terminal of a carrier amplifier, a voltage increased with increase in the envelope detected by the envelope detecting unit. As a result, highly efficient operation can be implemented without including a phase shifter including a quarter wavelength line or the like.
    Type: Application
    Filed: June 23, 2017
    Publication date: March 18, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shuichi SAKATA, Yuji KOMATSUZAKI, Shintaro SHINJO
  • Patent number: 10748860
    Abstract: Parallel inductors include a first metal wire (8a or 8b) for connecting a drain terminal (2) and a first metal pattern (7a or 7b), and a second metal wire (10a or 10b) for connecting the first metal pattern (7a or 7b) and a second metal pattern (9a or 9b). The second metal wires (10a and 10b) are each positioned between the corresponding first metal wire (8a or 8b) and a corresponding third metal wire (12a or 12b) for connecting the drain terminal (2) and a third metal pattern (11). The direction of current through the second metal wires (10a and 10b) is opposite to the direction of current through each of the first metal wire (8a or 8b) and the third metal wire (12a or 12b).
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: August 18, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Keigo Nakatani, Yuji Komatsuzaki, Shintaro Shinjo, Koji Yamanaka, Shohei Imai
  • Publication number: 20200244227
    Abstract: Included is a compensation circuit (9) having one end connected to another end of a first output circuit (7) and another end of a second output circuit (8) and another end grounded, the compensation circuit having an electrical length of 90 degrees at a first operation frequency and an electrical length of 45 degrees at a second operation frequency which is half of the first operation frequency.
    Type: Application
    Filed: April 10, 2020
    Publication date: July 30, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Keigo NAKATANI, Yuji KOMATSUZAKI, Shuichi SAKATA, Shintaro SHINJO, Koji YAMANAKA
  • Patent number: 10608594
    Abstract: In a Doherty amplifier including a carrier amplifier (6) and a peaking amplifier (8) connected in parallel with each other, a compensation circuit (9) for causing an impedance seen from an output end (9a) of the compensation circuit (9) toward the peaking amplifier (8) to be open within a used frequency range and compensating for frequency dependence of an impedance seen from an output of a combiner (10) toward the combiner (10) in a state in which the peaking amplifier (8) is not operating is arranged between the peaking amplifier (8) and the combiner (10). This achieves a wider bandwidth without making the circuit larger in size and more complicated.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: March 31, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Komatsuzaki, Shintaro Shinjo, Keigo Nakatani, Shohei Imai
  • Patent number: 10523158
    Abstract: Provided is a load modulation amplifier including: a high frequency circuit board; and on the board, an input distribution circuit unit (DC) including: a distributor for dividing one input signal into two signals IS1 and IS2; and a phase delay circuit formed on a signal line for the divided IS2; a carrier amplifier (CA) including a first high frequency transistor for amplifying the IS1; a peak amplifier (PA) including a second high frequency transistor and for amplifying the IS2; and an output combination circuit (OCCU) including: a 90-degree phase delay circuit (90DC) formed on a signal line for output of the CA; a combiner for combining output of the 90DC and output of the PA; and an impedance conversion circuit for converting an output impedance of the combiner. The CA and the PA are directly connected to the OCCU without converting an output impedance.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: December 31, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shintaro Shinjo, Yuji Komatsuzaki, Keigo Nakatani, Koji Yamanaka
  • Patent number: 10396721
    Abstract: A distributor distributes an input signal to a first transmission line and a second transmission line. A high-pass filter, a first linearizer, and a first phase shifter disposed on the first transmission line adjust the phase and amplitude of an intermodulation distortion in a low-frequency range. A low-pass filter, a second linearizer, and a second phase shifter disposed on the second transmission line adjust the phase and amplitude of an intermodulation distortion in a high-frequency range. A synthesizer synthesizes the signal from the first transmission line and the signal from the second transmission line.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: August 27, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yuji Komatsuzaki, Yuichi Fujimoto, Jun Nishihara, Kazuhiro Iyomasa, Koji Yamanaka
  • Patent number: 10340855
    Abstract: A Wilkinson power divider includes: ?-type LPFs connected to an input terminal; a T-type HPF having one end connected to one of the ?-type LPFs and having another end connected to a carrier amplifier; another T-type HPF having one end connected to another one of the ?-type LPFs and having another end connected to a ?/4 line; and an isolation resistor connected to connection points.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: July 2, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Komatsuzaki, Shintaro Shinjo, Keigo Nakatani, Takaaki Yoshioka
  • Publication number: 20190148315
    Abstract: Parallel inductors include a first metal wire (8a or 8b) for connecting a drain terminal (2) and a first metal pattern (7a or 7b), and a second metal wire (10a or 10b) for connecting the first metal pattern (7a or 7b) and a second metal pattern (9a or 9b). The second metal wires (10a and 10b) are each positioned between the corresponding first metal wire (8a or 8b) and a corresponding third metal wire (12a or 12b) for connecting the drain terminal (2) and a third metal pattern (11). The direction of current through the second metal wires (10a and 10b) is opposite to the direction of current through each of the first metal wire (8a or 8b) and the third metal wire (12a or 12b).
    Type: Application
    Filed: July 1, 2016
    Publication date: May 16, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Keigo NAKATANI, Yuji KOMATSUZAKI, Shintaro SHINJO, Koji YAMANAKA, Shohei IMAI
  • Publication number: 20190149097
    Abstract: In a Doherty amplifier including a carrier amplifier (6) and a peaking amplifier (8) connected in parallel with each other, a compensation circuit (9) for causing an impedance seen from an output end (9a) of the compensation circuit (9) toward the peaking amplifier (8) to be open within a used frequency range and compensating for frequency dependence of an impedance seen from an output of a combiner (10) toward the combiner (10) in a state in which the peaking amplifier (8) is not operating is arranged between the peaking amplifier (8) and the combiner (10). This achieves a wider bandwidth without making the circuit larger in size and more complicated.
    Type: Application
    Filed: May 18, 2016
    Publication date: May 16, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuji KOMATSUZAKI, Shintaro SHINJO, Keigo NAKATANI, Shohei IMAI
  • Publication number: 20190028062
    Abstract: Provided is a load modulation amplifier including: a high frequency circuit board; and on the board, an input distribution circuit unit (DC) including: a distributor for dividing one input signal into two signals IS1 and IS2; and a phase delay circuit formed on a signal line for the divided IS2; a carrier amplifier (CA) including a first high frequency transistor for amplifying the IS1; a peak amplifier (PA) including a second high frequency transistor and for amplifying the IS2; and an output combination circuit (OCCU) including: a 90-degree phase delay circuit (90DC) formed on a signal line for output of the CA; a combiner for combining output of the 90DC and output of the PA; and an impedance conversion circuit for converting an output impedance of the combiner. The CA and the PA are directly connected to the OCCU without converting an output impedance.
    Type: Application
    Filed: February 23, 2016
    Publication date: January 24, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shintaro SHINJO, Yuji KOMATSUZAKI, Keigo NAKATANI, Koji YAMANAKA
  • Publication number: 20180316317
    Abstract: A distributor distributes an input signal to a first transmission line and a second transmission line. A high-pass filter, a first linearizer, and a first phase shifter disposed on the first transmission line adjust the phase and amplitude of an intermodulation distortion in a low-frequency range. A low-pass filter, a second linearizer, and a second phase shifter disposed on the second transmission line adjust the phase and amplitude of an intermodulation distortion in a high-frequency range. A synthesizer synthesizes the signal from the first transmission line and the signal from the second transmission line.
    Type: Application
    Filed: November 18, 2015
    Publication date: November 1, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuji KOMATSUZAKI, Yuichi FUJIMOTO, Jun NISHIHARA, Kazuhiro IYOMASA, Koji YAMANAKA
  • Publication number: 20180287566
    Abstract: A Wilkinson power divider includes: ?-type LPFs connected to an input terminal; a T-type HPF having one end connected to one of the ?-type LPFs and having another end connected to a carrier amplifier; another T-type HPF having one end connected to another one of the ?-type LPFs and having another end connected to a ?/4 line; and an isolation resistor connected to connection points.
    Type: Application
    Filed: January 5, 2016
    Publication date: October 4, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuji KOMATSUZAKI, Shintaro SHINJO, Keigo NAKATANI, Takaaki YOSHIOKA
  • Patent number: 9929700
    Abstract: A distortion compensation circuit includes a low-pass circuit to block the passage of two-wave RF signals and intermodulation distortions and to allow the passage of a difference-frequency signal. The low-pass circuit is connected between a signal path and an intermodulation distortion adjustment circuit.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: March 27, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroshi Otsuka, Yuji Komatsuzaki, Jun Nishihara, Hifumi Noto, Koji Yamanaka
  • Publication number: 20170047898
    Abstract: A distortion compensation circuit includes a low-pass circuit to block the passage of two-wave RF signals and intermodulation distortions and to allow the passage of a difference-frequency signal. The low-pass circuit is connected between a signal path and an intermodulation distortion adjustment circuit.
    Type: Application
    Filed: April 24, 2015
    Publication date: February 16, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroshi OTSUKA, Yuji KOMATSUZAKI, Jun NISHIHARA, Hifumi NOTO, Koji YAMANAKA