Patents by Inventor Michiaki Kasahara
Michiaki Kasahara 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: 11555917Abstract: A radar device includes a transmission antenna and a reception antenna that is a structure different from the transmission antenna. The transmission antenna includes a single or a plurality of transmission element antennae and a transmission dielectric substrate where the single or the plurality of transmission element antennae is positioned, and a length in a first direction of the transmission antenna is longer than a length in a second direction of the transmission antenna, and the second direction is orthogonal to the first direction. The reception antenna includes a single or a plurality of reception element antennae and a reception dielectric substrate where the single or the plurality of reception element antennae is positioned, a length in a third direction of the reception antenna is longer than a length in a fourth direction of the reception antenna, and the fourth direction is orthogonal to the third direction.Type: GrantFiled: December 26, 2016Date of Patent: January 17, 2023Assignee: Mitsubishi Electric CorporationInventors: Takashi Maruyama, Masanori Ito, Michiaki Kasahara, Shigeo Udagawa
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Publication number: 20190302254Abstract: A radar device includes a transmission antenna and a reception antenna that is a structure different from the transmission antenna. The transmission antenna includes a single or a plurality of transmission element antennae and a transmission dielectric substrate where the single or the plurality of transmission element antennae is positioned, and a length in a first direction of the transmission antenna is longer than a length in a second direction of the transmission antenna, and the second direction is orthogonal to the first direction. The reception antenna includes a single or a plurality of reception element antennae and a reception dielectric substrate where the single or the plurality of reception element antennae is positioned, a length in a third direction of the reception antenna is longer than a length in a fourth direction of the reception antenna, and the fourth direction is orthogonal to the third direction.Type: ApplicationFiled: December 26, 2016Publication date: October 3, 2019Applicant: Mitsubishi Electric CorporationInventors: Takashi MARUYAMA, Masanori ITO, Michiaki KASAHARA, Shigeo UDAGAWA
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Patent number: 7167064Abstract: A phase shift circuit and a phase shifter are achieved which are small in size and wide in bandwidth. The phase shift circuit includes a capacitor, and a series circuit composed of a switching element which exhibits capacitivity when it is in an off-state and an inductor connected in series with this switching element, the series circuit being connected in parallel with the capacitor. The capacitor and one terminal of the series circuit are connected with a high frequency signal input/output terminal, and the other terminal thereof is connected with ground.Type: GrantFiled: January 7, 2003Date of Patent: January 23, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kenichi Miyaguchi, Morishige Hieda, Michiaki Kasahara, Tadashi Takagi, Mikio Hatamoto
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Patent number: 7123116Abstract: A phase shifter includes an FET 2a having its drain electrode connected to an input/output terminal 1a; and FET 2b having its drain electrode connected to the source electrode of the FET 2a and its source electrode connected to an input/output terminal 1b; and FET 2c having its drain electrode connected to the source electrode of the FET 2a; and an inductor 3a having its first terminal connected to the source electrode of the FET 2c and its second terminal connected to a ground. It can reduce the insertion loss by narrowing the gate width of the FET 2a, and carries out the phase shift of a high-frequency signal with suppressing the reflection.Type: GrantFiled: March 26, 2002Date of Patent: October 17, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Morishige Hieda, Kenichi Miyaguchi, Michiaki Kasahara, Tadashi Takagi, Hiroshi Ikematsu, Norio Takeuchi, Hiromasa Nakaguro, Kazuyoshi Inami
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Publication number: 20040145429Abstract: A phase shifter includes an FET 2a having its drain electrode connected to an input/output terminal 1a; an FET 2b having its drain electrode connected to the source electrode of the FET 2a and its source electrode connected to an input/output terminal 1b; an FET 2c having its drain electrode connected to the source electrode of the FET 2a; and an inductor 3a having its first terminal connected to the source electrode of the FET 2c and its second terminal connected to a ground. It can reduce the insertion loss by narrowing the gate width of the FET 2a, and carries out the phase shift of a high-frequency signal with suppressing the reflection.Type: ApplicationFiled: October 30, 2003Publication date: July 29, 2004Inventors: Morishige Hieda, Kenichi Miyaguchi, Michiaki Kasahara, Tadashi Takagi, Hiroshi Ikematsu, Norio Takeuchi, Hiromasa Nakaguro, Kazuyoshi Inami
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Publication number: 20040085112Abstract: A phase shift circuit and a phase shifter are achieved which are small in size and wide in bandwidth. The phase shift circuit includes a capacitor, and a series circuit composed of a switching element which exhibits capacitivity when it is in an off-state and an inductor connected in series with this switching element, the series circuit being connected in parallel with the capacitor. The capacitor and one terminal of the series circuit are connected with a high frequency signal input/output terminal, and the other terminal thereof is connected with ground.Type: ApplicationFiled: September 9, 2003Publication date: May 6, 2004Inventors: Kenichi Miyaguchi, Morishige Hieda, Michiaki Kasahara, Tadashi Takagi, Mikio Hatamoto
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Patent number: 6674341Abstract: A miniaturized phase shifter and a multi-bit phase shifter are provided, in which filters are constructed using capacitors at FET pinch-off and pass phase can be shifted by turning the FET on and off, the phase shifter including: a first FET having a drain electrode connected to an input terminal and a source electrode connected to an output terminal; a second FET, in which one of a drain electrode and a source electrode thereof is connected to the source electrode of the first FET and the other is connected to ground via a first inductor; and a third FET, in which one of a drain electrode and a source electrode thereof is connected to the drain electrode of the first FET and the other is connected to ground via a second inductor.Type: GrantFiled: August 27, 2002Date of Patent: January 6, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Morishige Hieda, Kenichi Miyaguchi, Kazutomi Mori, Michiaki Kasahara, Tadashi Takagi, Hiroshi Ikematsu, Norio Takeuchi, Hiromasa Nakaguro, Kazuyoshi Inami
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Publication number: 20030020563Abstract: A miniaturized phase shifter and a multi-bit phase shifter are provided, in which filters are constructed using capacitors at FET pinch-off and pass phase can be shifted by turning the FET on and off, the phase shifter including: a first FET having a drain electrode connected to an input terminal and a source electrode connected to an output terminal; a second FET, in which one of a drain electrode and a source electrode thereof is connected to the source electrode of the first FET and the other is connected to ground via a first inductor; and a third FET, in which one of a drain electrode and a source electrode thereof is connected to the drain electrode of the first FET and the other is connected to ground via a second inductor.Type: ApplicationFiled: August 27, 2002Publication date: January 30, 2003Inventors: Morishige Hieda, Kenichi Miyaguchi, Kazutomi Mori, Michiaki Kasahara, Tadashi Takagi, Hiroshi Ikematsu, Norio Takeuchi, Hiromasa Nakaguro, Kazuyoshi Inami
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Patent number: 5701107Abstract: A phase shifter, which can switch between a phase delay circuit and a phase leading circuit consisting of inductors and capacitors, is constituted by disposing FETs having inductors or capacitors arranged in parallel with the source and drain electrodes of each FET connected and controlling a bias voltage to be applied to the gate electrodes of the FETs to switch between the on and off conditions of the FETs. Thus, a phase shifter obtained has a small frequency characteristic.Type: GrantFiled: March 13, 1996Date of Patent: December 23, 1997Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Michiaki Kasahara, Hazime Kawano, Kazuyoshi Inami, Kohichi Muroi, Yoshitada Iyama
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Patent number: 5680079Abstract: There is provided a small size phase shifter which can shift a phase by 180 degrees wherein the accuracy of preset phase is less dependent on frequency. The phase shifter comprises first to fourth switches provided between a first line pair and a second line pair. By turning the first and second switches ON and the third and fourth switches OFF, a signal inputted to the first line pair is outputted from the second line pair in phase. By turning the first and second switches OFF and the third and fourth switches ON, a signal inputted to the first line pair is outputted from the second line pair out of phase. A small-size phase shifter which has the accuracy of preset phase less dependent on frequency can then be obtained.Type: GrantFiled: May 24, 1995Date of Patent: October 21, 1997Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuyoshi Inami, Michiaki Kasahara, Hazime Kawano, Kohichi Muroi