Patents by Inventor Syuichi Sekine
Syuichi Sekine 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: 20030224742Abstract: One of objects of a wireless communication apparatus according to the present invention is to realize stable communication regardless of received signal strength indication and information amount.Type: ApplicationFiled: April 25, 2003Publication date: December 4, 2003Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Syuichi Sekine, Mutsumu Serizawa, Hiroki Shoki, Hiroshi Tsurumi, Shuichi Obayashi, Kiyoshi Toshimitsu, Tomoko Adachi, Tsuguhide Aoki, Ren Sakata, Ryoko Matsuo
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Publication number: 20030203741Abstract: An object of the present invention is to prevent congestion of networks and to effectively use a plurality of autonomous distributed wireless networks.Type: ApplicationFiled: April 28, 2003Publication date: October 30, 2003Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Ryoko Matsuo, Syuichi Sekine, Mutsumu Serizawa, Hiroki Shoki, Hiroshi Tsurumi, Shuichi Obayashi, Tomoko Adachi, Kiyoshi Toshimitsu, Tsuguhide Aoki, Ren Sakata
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Publication number: 20030006937Abstract: An antenna apparatus is constituted by first, second, third, and fourth wire antenna elements and a connection element. The sum of the lengths of the first, second, and fourth wire antenna elements is ¼ the wavelength corresponding to a series-resonance frequency of the first, second, and fourth wire antenna elements. The sum of the lengths of the second, third, and fourth wire antenna elements is ½ the wavelength corresponding to a parallel-resonance frequency of the second, third, and fourth wire antenna elements. The sum of the lengths of the first and third wire antenna elements is ¼ the wavelength corresponding to a series-resonance frequency of the first and third wire antenna elements. The parallel-resonance frequency is higher than the series-resonance frequency of the first, second, and fourth wire antenna elements and lower than the series-resonance frequency of the first and third wire antenna elements.Type: ApplicationFiled: July 5, 2002Publication date: January 9, 2003Inventors: Syuichi Sekine, Takayoshi Ito, Yasushi Murakami, Hiroki Shoki
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Patent number: 6388627Abstract: An information processor includes a display case having a display panel therein. A antenna is disposed in an upper end of the display case opposite a hinge mechanism connecting the display case to a main body. The display case is movable between an open and a closed position. The antenna has radiation characteristics that provide reception and transmission capability when the display case is either in the open or closed position.Type: GrantFiled: November 21, 2000Date of Patent: May 14, 2002Assignee: Kabushiki Kaisha ToshibaInventors: Toshiyuki Masaki, Koichi Kobayashi, Yoshinori Horiguchi, Toshiki Miyasaka, Hiroki Iwahara, Syuichi Sekine
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Publication number: 20020032009Abstract: In a radio apparatus, the band of a loop filter of a synthesizer in a blank channel searching state is narrower than the band in a communicating state. In addition, a radio wave environment is measured. A characteristic necessary for the radio apparatus is determined corresponding to the measured radio wave environment. The power is controlled corresponding to the performance of the radio apparatus. Thus, the power consumption is decreased. In addition, the efficiency of the output power is improved. In the radio apparatus, the current consumption of a power amplifier PA is measured. A matching circuit (LNA or MIX) of the antenna is adjusted with the measured result so as to decrease an antenna loss. In the radio apparatus, a DC offset is removed from the transmitted power and the reflected wave. When the DC offset is removed using an AC coupling capacitor, the deterioration of the frequency characteristic of the receiving portion is compensated with a capacitor in a digital signal process.Type: ApplicationFiled: November 23, 2001Publication date: March 14, 2002Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Shoji Otaka, Hiroshi Tsurumi, Hiroshi Yoshida, Syuichi Sekine, Hiroyuki Kayano, Tadahiko Maeda
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Patent number: 6346916Abstract: Antenna apparatus is comprised of dipole antenna arranged proximate to a surface of metal housing including radio device circuit and having two quarter wavelength elements having opposite end portions being feed points, short-circuit element short-circuiting the quarter wavelength elements, and coaxial feed line having outer conductor and central conductor having one ends connected to the feed points, respectively, and connecting the feed points to radio device circuit. The coaxial feed line is arranged along part of the quarter wavelength element and part of the short-circuit element and branched from central portion of the short-circuit element. The outer conductor is electrically connected to part of the quarter wavelength element and part of the short-circuit element. Currents leaked onto the feed line and flowing through the two quarter wavelength elements are also divided to the short-circuit element.Type: GrantFiled: February 25, 2000Date of Patent: February 12, 2002Assignee: Kabushiki Kaisha ToshibaInventors: Noriaki Odachi, Syuichi Sekine
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Patent number: 6339711Abstract: In a radio apparatus, the band of a loop filter of a synthesizer in a blank channel searching state is narrower than the band in a communicating state. In addition, a radio wave environment is measured. A characteristic necessary for the radio apparatus is determined corresponding to the measured radio wave environment. The power is controlled corresponding to the performance of the radio apparatus. Thus, the power consumption is decreased. In addition, the efficiency of the output power is improved. In the radio apparatus, the current consumption of a power amplifier PA is measured. A matching circuit (LNA or MIX) of the antenna is adjusted with the measured result so as to decrease an antenna loss. In the radio apparatus, a DC offset is removed from the transmitted power and the reflected wave. When the DC offset is removed using an AC coupling capacitor, the deterioration of the frequency characteristic of the receiving portion is compensated with a capacitor in a digital signal process.Type: GrantFiled: March 16, 1998Date of Patent: January 15, 2002Assignee: Kabushiki Kaisha ToshibaInventors: Shoji Otaka, Hiroshi Tsurumi, Hiroshi Yoshida, Syuichi Sekine, Hiroyuki Kayano, Tadahiko Maeda
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Patent number: 6285328Abstract: An information processor includes a display case having a display panel therein. A antenna is disposed in an upper end of the display case opposite a hinge mechanism connecting the display case to a main body. The display case is movable between an open and a closed position. The antenna has radiation characteristics that provide reception and transmission capability when the display case is either in the open or closed position.Type: GrantFiled: December 7, 1999Date of Patent: September 4, 2001Assignee: Kabushiki Kaisha ToshibaInventors: Toshiyuki Masaki, Koichi Kobayashi, Yoshinori Horiguchi, Toshiki Miyasaka, Hiroki Iwahara, Syuichi Sekine
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Publication number: 20010012768Abstract: A portable radio terminal comprises a housing, a radio circuit included in the housing, a matching circuit mounted on the top of the housing at a position which is offset from the longitudinal center line of the housing, a load connected to the tip of the matching circuit, and a linear antenna connected to the load. This portable radio terminal further comprises load changing means for changing the value of the load. The matching circuit may comprise a meander matching element, a zigzag-shaped matching element, a helical matching element, a conical matching element, a rectangular helical matching element or a pyramid helical matching element which are formed so as to a predetermined shape, such as a meander shape, a zigzag shape, a helical shape, a conical shape, a rectangular helical shape or pyramid helical shape.Type: ApplicationFiled: February 7, 2001Publication date: August 9, 2001Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Noriaki Odachi, Syuichi Sekine
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Patent number: 6147652Abstract: An antenna apparatus includes a rectangular conductor plate having a longitudinal length of one fourth the wavelength of a signal having an operating frequency and a line-shaped inverted F antenna mounted thereon. The line-shaped inverted F antenna is disposed at one end in the longitudinal direction of the conductor plate so as to be perpendicular to the longitudinal sides of the conductor plate.Type: GrantFiled: September 18, 1998Date of Patent: November 14, 2000Assignee: Kabushiki Kaisha ToshibaInventor: Syuichi Sekine
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Patent number: 5936583Abstract: A portable radio communication device capable of eliminating the deterioration of the radiation efficiency due to the occurrence of the dual resonance on the antenna, without reducing the bandwidth. A radio communication device, comprises: a device body made of a conductor body, containing at least one of a radio transmitter and a radio receiver; and an antenna, mounted on the device body, formed by first and second strip-like conductor elements which are connected together at a feeding point connected with said at least one of the radio transmitter and the radio receiver, the first and second strip-like conductor elements having an identical electrical length with each other.Type: GrantFiled: March 24, 1997Date of Patent: August 10, 1999Assignee: Kabushiki Kaisha ToshibaInventors: Syuichi Sekine, Minoru Sakurai, Tadahiko Maeda, Yasuo Suzuki, Syuichi Obayashi
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Patent number: 5903822Abstract: A portable radio and telephone equipment for transmitting and receiving an electric wave. The portable radio and telephone equipment includes: an antenna for transmitting and receiving an electromagnetic wave; a housing connected to the antenna, having a notch therein; and an internal circuit, connected to the antenna by way of the housing, for generating and receiving the electromagnetic wave. The portable radio and telephone equipment includes: an antenna for transmitting and receiving an electromagnetic wave; an upper portion of a housing connected to the antenna; and a lower portion of a housing connected to the upper portion of the housing via a conductor wire, so that the housing is divided into two portions in order to vary distribution pattern of the electromagnetic wave.Type: GrantFiled: February 1, 1996Date of Patent: May 11, 1999Assignee: Kabushiki Kaisha ToshibaInventors: Syuichi Sekine, Tadahiko Maeda
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Patent number: 5517676Abstract: A portable radio and telephone equipment for transmitting and receiving an electric wave. The portable radio and telephone equipment includes: an antenna for transmitting and receiving an electromagnetic wave; a housing connected to the antenna, having a notch therein; and an internal circuit, connected to the antenna by way of the housing, for generating and receiving the electromagnetic wave. The portable radio and telephone equipment includes: an antenna for transmitting and receiving an electromagnetic wave; an upper portion of a housing connected to the antenna; and a lower portion of a housing connected to the upper portion of the housing via a conductor wire, so that the housing is divided into two portions in order to vary distribution pattern of the electromagnetic wave.Type: GrantFiled: December 23, 1992Date of Patent: May 14, 1996Assignee: Kabushiki Kaisha ToshibaInventors: Syuichi Sekine, Tadahiko Maeda