Patents by Inventor Tadashi FUKAGAI
Tadashi FUKAGAI 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: 20240006751Abstract: There is provided an antenna device comprising: a chip antenna arranged on a substrate; and a metal element arranged on the same substrate as the chip antenna, wherein the metal element is arranged such that a longitudinal direction of the metal element is vertical with respect to the substrate in a direction in which a current flows in the chip antenna.Type: ApplicationFiled: June 27, 2023Publication date: January 4, 2024Applicants: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO, TAIWAN INPAQ ELECTRONIC CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masateru FURUTA, Tadashi FUKAGAI, Yuki KONO, Yutaka KUBO, Taiichi YAMAGUCHI, Ta-Fu CHENG, Chih-Ming SU, Tetsuya KOBAYASHI, Junzou OHE
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Publication number: 20240006754Abstract: There is provided an antenna device comprising: a chip antenna that is disposed on a substrate; and a metal element that is disposed above or below the chip antenna in a direction orthogonal to a plane of the substrate.Type: ApplicationFiled: June 22, 2023Publication date: January 4, 2024Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Yuki KONO, Tadashi FUKAGAI, Masateru FURUTA, Yutaka KUBO
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Publication number: 20240006750Abstract: There is provided an antenna device comprising: a pattern antenna formed on a substrate; and a metal element arranged on the same substrate as the pattern antenna, wherein the metal element is arranged such that a longitudinal direction of the metal element is vertical with respect to the substrate near an area surface in which a current flows in the pattern antenna.Type: ApplicationFiled: June 26, 2023Publication date: January 4, 2024Applicants: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masateru FURUTA, Tadashi FUKAGAI, Yuki KONO, Yutaka KUBO, Tetsuya KOBAYASHI, Junzou OHE
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Publication number: 20230324503Abstract: There is provided a determination device comprising a determination section configured to determine an area where a portable device is positioned, on a basis of wireless communication between a plurality of first wireless communication devices installed at different portions of a mobile object and a second wireless communication device installed in a portable device, in conformity with a designated communication standard, wherein the determination section determines the area where the portable device is positioned, by using different determination expressions depending on the respective first wireless communication devices, each of which has successfully calculated an RSSI with regard to a signal received from the second wireless communication device through wireless communication compliant with the designated communication standard and a determination target area.Type: ApplicationFiled: December 28, 2022Publication date: October 12, 2023Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Kazuki NAIKI, Tadashi FUKAGAI, Masateru FURUTA, Yuki KONO, Keigo KAGIMOTO, Satoshi NAGAMIZO
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Publication number: 20230324498Abstract: There is provided a determination device comprising a determination section configured to determine an area where a portable device is positioned, on a basis of wireless communication between a plurality of first wireless communication devices disposed at different portions in a target space where a plurality of areas is defined and a second wireless communication device installed in a portable device, in conformity with a designated communication standard, wherein the determination section determines the area where the portable device is positioned, by using different determination expressions depending on the respective first wireless communication devices, each of which has successfully calculated an RSSI with regard to a signal received from the second wireless communication device through wireless communication compliant with the designated communication standard and a determination target area.Type: ApplicationFiled: March 14, 2023Publication date: October 12, 2023Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Kazuki NAIKI, Tadashi FUKAGAI, Masateru FURUTA, Yuki KONO, Keigo KAGIMOTO, Satoshi NAGAMIZO
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Publication number: 20230305098Abstract: A determination device comprising a determination section configured to determine whether a portable device is positioned in a first area or a second area on a basis of results of ranging based on wireless communication between at least two first wireless communication devices and a second wireless communication device, the at least two first wireless communication devices being disposed with a boundary arrangement interposed therebetween, the boundary arrangement being arranged at a boundary between the first area and the second area, the second wireless communication device being installed in the portable device, wherein the determination section determines whether the portable device is positioned in the first area or the second area on a basis of a difference between ranging value calculated by first wireless communication device disposed in the first area and ranging value calculated by first wireless communication device disposed in the second area.Type: ApplicationFiled: December 28, 2022Publication date: September 28, 2023Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Kazuki NAIKI, Tadashi FUKAGAI, Masateru FURUTA, Yuki KONO, Keigo KAGIMOTO
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Publication number: 20230239821Abstract: A wireless communication device having a control section configured to control transmission and reception of a wireless signal by an antenna in conformity with a designated communication standard, wherein the control section controls a timing of causing the antenna to transmit a second signal in response to a first signal received by the antenna, on a basis of fixed time and delay time related to internal transfer in the wireless communication device, the fixed time being decided in advance.Type: ApplicationFiled: March 28, 2023Publication date: July 27, 2023Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Masateru FURUTA, Tadashi FUKAGAI, Yuki KONO, Yutaka KUBO
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Publication number: 20230227000Abstract: Provided in a vehicle are: an external communications unit provided outside the compartment of the vehicle; and an internal communications unit provided inside the vehicle compartment. A position determination system includes a data acquisition unit that obtains reception signal strength data for radio waves that have been communicated and measured, between the external communications unit and a terminal and between the internal communications unit and the terminal. The position determination system also includes a position determination unit that determines whether the terminal is positioned outside or inside the vehicle, from the results of comparison between the size of data obtained from communication between the external communications unit and the terminal and between the internal communications unit and the terminal. In addition, the external communications unit is disposed inside a body component located around a rear wheel of the vehicle.Type: ApplicationFiled: June 21, 2021Publication date: July 20, 2023Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Yoshiki KATO, Masanori KOSUGI, Tadashi FUKAGAI, Nobuaki TSUTSUMI
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Publication number: 20230198697Abstract: There is provided a communication device comprising: a control unit configured to control ranging with a wireless signal in conformity with a regulated communication standard, wherein the control unit controls output intensity of a data transmission signal that has a payload based on reception sensitivity for a plurality of ranging signals transmitted to and received from other communication devices.Type: ApplicationFiled: December 2, 2022Publication date: June 22, 2023Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Masateru FURUTA, Tadashi FUKAGAI, Yuki KONO, Yutaka KUBO
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Patent number: 11659506Abstract: To provide a mechanism capable of matching timings at which communication is performed between devices. A communication device for performing wireless communication with another communication device, the communication device comprising: a first wireless communication unit configured to perform communication conforming to a first wireless communication standard; a second wireless communication unit configured to perform communication conforming to a second wireless communication standard; and a control unit configured to control the first wireless communication unit so that the first wireless communication unit transmits, a plurality of times, a first signal, the first signal being a signal conforming to the first wireless communication standard and being a signal including setting information that is information for setting a timing at which the second wireless communication unit performs communication.Type: GrantFiled: January 27, 2021Date of Patent: May 23, 2023Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Masateru Furuta, Tadashi Fukagai, Yuki Kono, Yutaka Kubo
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Patent number: 11647474Abstract: To calculate the propagation times of signals transmitted and received between the devices more easily and accurately. There is provided a wireless communication device comprising a control section configured to control transmission and reception of a wireless signal by an antenna in conformity with a designated communication standard, wherein the control section controls a timing of causing the antenna to transmit a second signal in response to a first signal received by the antenna, on a basis of fixed time and delay time related to internal transfer in the wireless communication device, the fixed time being decided in advance.Type: GrantFiled: August 12, 2021Date of Patent: May 9, 2023Assignee: KABUSHIKI KAISHA TOKAI DENKI SEISAKUSHOInventors: Masateru Furuta, Tadashi Fukagai, Yuki Kono, Yutaka Kubo
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Publication number: 20230133362Abstract: A control device includes a control section configured to obtain one or more distance measurement values, and estimate a relative position of a position changeable type communication device with respect to a target space based on the one or more distance measurement values, the one or more distance measurement values being obtained when one or more position fixed type communication devices and the position changeable type communication device perform wireless communication, and indicating a distance between each of the one or more position fixed type communication devices and the position changeable type communication device.Type: ApplicationFiled: December 2, 2020Publication date: May 4, 2023Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Masateru FURUTA, Tadashi FUKAGAI, Yuki KONO, Yutaka KUBO, Yosuke OHASHI
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Publication number: 20220295251Abstract: There is provided a communication device comprising: a BLE communication section configured to perform BLE communication with another communication device different from the communication device, the BLE communication being wireless communication conforming to BLE communication standards; a UWB communication section configured to perform UWB communication with the another communication device, the UWB communication being wireless communication conforming to UWB communication standards; and a control section configured to control the BLE communication of the BLE communication section and the UWB communication of the UWB communication section, wherein the control section performs control to start the UWB communication based on a response signal transmitted by one of the BLE communication section and the another communication device as a response to a request signal transmitted by other one of the BLE communication section and the another communication device during the BLE communication.Type: ApplicationFiled: January 26, 2022Publication date: September 15, 2022Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Yutaka KUBO, Tadashi FUKAGAI, Masateru FURUTA, Yuki KONO
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Publication number: 20220264327Abstract: A communication device comprising: a wireless communication section capable of wirelessly transmitting and receiving a signal to and from another communication device; and a control section configured to control the wireless communication section in such a manner that the wireless communication section performs a first process and a second process, the first process including transmitting the signal while switching a frequency to be used among a plurality of frequencies, the second process including performing communication by using an optimum frequency that is a frequency selected from among the plurality of frequencies in the first process.Type: ApplicationFiled: January 31, 2022Publication date: August 18, 2022Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Masateru FURUTA, Tadashi FUKAGAI, Yuki KONO, Yutaka KUBO
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Publication number: 20220086785Abstract: To calculate the propagation times of signals transmitted and received between the devices more easily and accurately. There is provided a wireless communication device comprising a control section configured to control transmission and reception of a wireless signal by an antenna in conformity with a designated communication standard, wherein the control section controls a timing of causing the antenna to transmit a second signal in response to a first signal received by the antenna, on a basis of fixed time and delay time related to internal transfer in the wireless communication device, the fixed time being decided in advance.Type: ApplicationFiled: August 12, 2021Publication date: March 17, 2022Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Masateru FURUTA, Tadashi FUKAGAI, Yuki KONO, Yutaka KUBO
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Patent number: 11271916Abstract: A system that prevents accomplishment of unauthorized communication between a terminal and a communication peer is provided. The system includes a measurement unit and a process execution unit. The measurement unit is arranged on at least one of the terminal or the communication peer to obtain a measured value corresponding to a distance between the terminal and the communication peer. The process execution unit determines whether the measured value is appropriate and controls actuation for authentication of the terminal through wireless communication performed between the terminal and the communication peer based on the determination result. The measurement unit executes a process for obtaining the measured value in a time period during which the communication for the authentication is not performed.Type: GrantFiled: August 19, 2019Date of Patent: March 8, 2022Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Masanori Kosugi, Shigenori Nitta, Masateru Furuta, Tadashi Fukagai, Masayuki Kawamura, Yuki Kono
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Publication number: 20210297962Abstract: To provide a mechanism capable of matching timings at which communication is performed between devices. A communication device for performing wireless communication with another communication device, the communication device comprising: a first wireless communication unit configured to perform communication conforming to a first wireless communication standard; a second wireless communication unit configured to perform communication conforming to a second wireless communication standard; and a control unit configured to control the first wireless communication unit so that the first wireless communication unit transmits, a plurality of times, a first signal, the first signal being a signal conforming to the first wireless communication standard and being a signal including setting information that is information for setting a timing at which the second wireless communication unit performs communication.Type: ApplicationFiled: January 27, 2021Publication date: September 23, 2021Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Masateru FURUTA, Tadashi FUKAGAI, Yuki KONO, Yutaka KUBO
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Publication number: 20200067898Abstract: A system that prevents accomplishment of unauthorized communication between a terminal and a communication peer is provided. The system includes a measurement unit and a process execution unit. The measurement unit is arranged on at least one of the terminal or the communication peer to obtain a measured value corresponding to a distance between the terminal and the communication peer. The process execution unit determines whether the measured value is appropriate and controls actuation for authentication of the terminal through wireless communication performed between the terminal and the communication peer based on the determination result. The measurement unit executes a process for obtaining the measured value in a time period during which the communication for the authentication is not performed.Type: ApplicationFiled: August 19, 2019Publication date: February 27, 2020Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Masanori KOSUGI, Shigenori NITTA, Masateru FURUTA, Tadashi FUKAGAI, Masayuki KAWAMURA, Yuki KONO