Patents by Inventor Masato KOHTANI
Masato KOHTANI 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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Patent number: 11967774Abstract: An antenna array for a high frequency device includes a plurality of antenna elements used for a radar device and arranged in a two-dimensional array in a predetermined area. The plurality of antenna elements includes grouped on-elements and single on-elements with specific distance for grating lobe cancellation, each of them is electrically connected to a phase shifter. The on-elements are arranged such that density of the on-elements at a center portion in the two-dimensional array is high and density of the on-elements at four corners in the two-dimensional array is low.Type: GrantFiled: June 7, 2022Date of Patent: April 23, 2024Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, MIRISE Technologies CorporationInventor: Masato Kohtani
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Patent number: 11635488Abstract: A self-diagnosis device of a module including a general-purpose multi-channel IC and a reception phase shifter IC having a plurality of transmission output terminals and reception terminals is configured to perform a self-diagnosis of the reception phase shifter IC by utilizing a signal that is generatable by the general-purpose multi-channel IC, which is enabled by a self-diagnosis signal generation unit that generates a self-diagnosis signal by using (a) a first output signal supplied to a multi-channel receiver of the general-purpose multi-channel IC and (b) a third output signal and a self-diagnosis clock signal synchronously output from a single PLL.Type: GrantFiled: December 29, 2020Date of Patent: April 25, 2023Assignee: DENSO CORPORATIONInventor: Masato Kohtani
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Publication number: 20220407225Abstract: An antenna array for a high frequency device includes a plurality of antenna elements used for a radar device and arranged in a two-dimensional array in a predetermined area. The plurality of antenna elements includes grouped on-elements and single on-elements with specific distance for grating lobe cancellation, each of them is electrically connected to a phase shifter. The on-elements are arranged such that density of the on-elements at a center portion in the two-dimensional array is high and density of the on-elements at four corners in the two-dimensional array is low.Type: ApplicationFiled: June 7, 2022Publication date: December 22, 2022Inventor: Masato KOHTANI
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Patent number: 11525888Abstract: A self-diagnosis device of a radar system or a phased-array antenna module including a general-purpose multi-channel IC and a transmission phase shifter IC having a plurality of transmission output terminals and reception terminals is configured to perform a self-diagnosis of the transmission phase shifter by utilizing a signal that is generatable by the general-purpose multi-channel IC, which is enabled by a built-in self-test circuit that (A) generates a self-diagnosis monitor signal converted into a low frequency band, which is a mixture of (i) a self-diagnosis signal generated from (a) a third output signal and a fourth output signal output in sync from same PLL with (b) a first output signal to be supplied to a reception frequency converter of the general-purpose multi-channel IC, and (ii) a composite signal of the transmission channel, and (B) analyzes a phase of the self-diagnosis monitor signal.Type: GrantFiled: December 29, 2020Date of Patent: December 13, 2022Assignee: DENSO CORPORATIONInventor: Masato Kohtani
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Publication number: 20220107408Abstract: A radar device for a vehicle includes: two or more receiving channels, each of which includes a mixer. At least one or more of the receiving channels includes: a phased array antenna divided into at least two or more branches to provide sub-array antenna elements; and a first phase shifter and a variable gain amplifier as a high frequency unit disposed between each of the sub-array antenna elements and the mixer. A numerical number of the sub-array antenna elements is equal to or more than a numerical number of the high-frequency units.Type: ApplicationFiled: August 31, 2021Publication date: April 7, 2022Inventor: Masato KOHTANI
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Publication number: 20210208243Abstract: A self-diagnosis device of a module including a general-purpose multi-channel IC and a reception phase shifter IC having a plurality of transmission output terminals and reception terminals is configured to perform a self-diagnosis of the reception phase shifter IC by utilizing a signal that is generatable by the general-purpose multi-channel IC, which is enabled by a self-diagnosis signal generation unit that generates a self-diagnosis signal by using (a) a first output signal supplied to a multi-channel receiver of the general-purpose multi-channel IC and (b) a third output signal and a self-diagnosis clock signal synchronously output from a single PLL.Type: ApplicationFiled: December 29, 2020Publication date: July 8, 2021Inventor: MASATO KOHTANI
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Publication number: 20210208246Abstract: A self-diagnosis device of a radar system or a phased-array antenna module including a general-purpose multi-channel IC and a transmission phase shifter IC having a plurality of transmission output terminals and reception terminals is configured to perform a self-diagnosis of the transmission phase shifter by utilizing a signal that is generatable by the general-purpose multi-channel IC, which is enabled by a built-in self-test circuit that (A) generates a self-diagnosis monitor signal converted into a low frequency band, which is a mixture of (i) a self-diagnosis signal generated from (a) a third output signal and a fourth output signal output in sync from same PLL with (b) a first output signal to be supplied to a reception frequency converter of the general-purpose multi-channel IC, and (ii) a composite signal of the transmission channel, and (B) analyzes a phase of the self-diagnosis monitor signal.Type: ApplicationFiled: December 29, 2020Publication date: July 8, 2021Inventor: MASATO KOHTANI
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Patent number: 9209749Abstract: A multiplier circuit and wireless communication apparatus that adjust an output level of a desired multiple wave to a desired range is provided. The multiplier circuit includes a multiple wave output unit configured to receive an input signal of a predetermined frequency, to output a multiple wave that is a predetermined multiple of the input signal, and control harmonic distortion associated with the output of the multiple wave based on a gate-source voltage; and a controller configured to adjust the gate-source voltage.Type: GrantFiled: December 10, 2013Date of Patent: December 8, 2015Assignee: Samsung Electronics Co., Ltd.Inventor: Masato Kohtani
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Publication number: 20150004922Abstract: A modulation circuit that can improve an on/off ratio or increase short pulses, and a wireless communication apparatus are provided. The modulation circuit includes a first transistor in which a first signal is input to a gate terminal; a second transistor that is cascode-connected to the first transistor by connecting a source terminal to a drain terminal of the first transistor, that receives an input of a second signal having a frequency lower than the first signal at a gate terminal, and that modulates the second signal by the first signal and outputs the modulated second signal; and a switch circuit that is formed on the output side of the second transistor. The switch circuit is turned on in synch with a switching of the second transistor to an off state, and turned off in synch with a switching of the second transistor to an on state.Type: ApplicationFiled: December 30, 2013Publication date: January 1, 2015Applicant: Samsung Electronics Co., Ltd.Inventor: Masato KOHTANI
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Publication number: 20140162577Abstract: A multiplier circuit and wireless communication apparatus that adjust an output level of a desired multiple wave to a desired range is provided. The multiplier circuit includes a multiple wave output unit configured to receive an input signal of a predetermined frequency, to output a multiple wave that is a predetermined multiple of the input signal, and control harmonic distortion associated with the output of the multiple wave based on a gate-source voltage; and a controller configured to adjust the gate-source voltage.Type: ApplicationFiled: December 10, 2013Publication date: June 12, 2014Applicant: Samsung Electronics Co., Ltd.Inventor: Masato KOHTANI