Patents by Inventor Osamu Tasaki
Osamu Tasaki 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: 10168208Abstract: A signal detected by a photomultiplier tube is pre-amplified and converted into a digital signal. A time average value of signal components, each of which has a voltage lower than a predetermined base threshold value, is calculated as a base voltage. A signal that has been subjected to base correction processing is subjected to threshold value processing and to base correction processing in a non-incident state in which light is not incident on the photomultiplier tube. An output signal thereof is subjected to dark current calculation processing; and a light emission signal amount is calculated by subtracting, from the signal component of the detection light obtained by the threshold value processing, a time average value of the signal components of the dark current. As the result, discriminating the dark current pulse from floor noises enhances the accuracy of the base voltage, and thus the accuracy of light detection.Type: GrantFiled: March 16, 2016Date of Patent: January 1, 2019Assignee: Hitachi High-Technologies CorporationInventors: Yutaka Kasai, Fujio Onishi, Osamu Tasaki, Hidetsugu Tanoue, Kazuhiro Tanaka
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Publication number: 20180066986Abstract: A signal detected by a photomultiplier tube is pre-amplified and converted into a digital signal. A time average value of signal components, each of which has a voltage lower than a predetermined base threshold value, is calculated as a base voltage. A signal that has been subjected to base correction processing is subjected to threshold value processing and to base correction processing in a non-incident state in which light is not incident on the photomultiplier tube. An output signal thereof is subjected to dark current calculation processing; and a light emission signal amount is calculated by subtracting, from the signal component of the detection light obtained by the threshold value processing, a time average value of the signal components of the dark current. As the result, discriminating the dark current pulse from floor noises enhances the accuracy of the base voltage, and thus the accuracy of light detection.Type: ApplicationFiled: March 16, 2016Publication date: March 8, 2018Inventors: Yutaka KASAI, Fujio ONISHI, Osamu TASAKI, Hidetsugu TANOUE, Kazuhiro TANAKA
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Patent number: 9214733Abstract: Provided is an antenna device including a substrate, a metal chassis disposed adjacent a rear surface of the substrate, multiple patch antenna elements formed in an array on a front surface of the substrate, feeding lines formed on the front surface of the substrate and through which electricity is fed to the multiple patch antenna elements, and a ground conductor formed on the rear surface of the substrate in a portion opposite the feeding lines.Type: GrantFiled: March 14, 2013Date of Patent: December 15, 2015Assignee: Hitachi Cable, Ltd.Inventors: Osamu Tasaki, Tomoyuki Ogawa, Shinsuke Murano
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Patent number: 8798679Abstract: A mobile communication base station antenna has a plurality of polarization diversity antenna blocks, each of the polarization diversity antenna blocks including a plurality of polarization diversity antenna elements, each of the polarization diversity antenna elements including antenna elements that are disposed to be orthogonal to each other. The polarization diversity antenna elements of one of the polarization diversity antenna blocks are interposed between the polarization diversity antenna elements of another one of the polarization diversity antenna blocks, and tilt angles in the vertical plane of the respective polarization diversity antenna blocks are different from each other.Type: GrantFiled: March 2, 2010Date of Patent: August 5, 2014Assignee: Hitachi Metals, Ltd.Inventors: Takayuki Shimizu, Shinsuke Murano, Osamu Tasaki
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Patent number: 8633862Abstract: A mobile communication base station antenna has a first array antenna and a second array antenna. Antenna elements of the first and second array antennas are classified into the first, second and third groups G1, G2 and G3. A first feeding port is connected to the antenna elements in the odd number groups (the first group G1 and the third group G3) of the first array antenna and the antenna elements in the even number group of the second array antenna. On the other hand, a second feeding port is connected to the antenna elements in the even number group (the second group G2) of the first array antenna and the antenna elements in the odd number groups (the first group G1 and the third group G3) of the second array antenna.Type: GrantFiled: September 14, 2011Date of Patent: January 21, 2014Assignee: Hitachi Cable, Ltd.Inventors: Osamu Tasaki, Tomoyuki Ogawa, Takayuki Shimizu, Shinsuke Murano, Ryota Suzuki
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Publication number: 20130314284Abstract: Provided is an antenna device including a substrate, a metal chassis disposed adjacent a rear surface of the substrate, multiple patch antenna elements formed in an array on a front surface of the substrate, feeding lines formed on the front surface of the substrate and through which electricity is fed to the multiple patch antenna elements, and a ground conductor formed on the rear surface of the substrate in a portion opposite the feeding lines.Type: ApplicationFiled: March 14, 2013Publication date: November 28, 2013Applicant: Hitachi Cable, Ltd.Inventors: Osamu Tasaki, Tomoyuki Ogawa, Shinsuke Murano
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Publication number: 20130271344Abstract: An antenna device includes a substrate including a front surface, a back surface, and via holes formed therein, a plurality of patch antenna elements formed in an array on the front surface of the substrate, a feed line formed on the back surface of the substrate to feed the plurality of patch antenna elements through the via holes formed in the substrate, and a metal chassis disposed opposite the substrate with an air layer therebetween on the back surface of the substrate. The metal chassis is electrically grounded.Type: ApplicationFiled: March 7, 2013Publication date: October 17, 2013Applicant: Hitachi Cable, Ltd.Inventors: Osamu TASAKI, Tomoyuki Ogawa, Shinsuke Murano
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Publication number: 20120115548Abstract: A mobile communication base station antenna has two array antennas juxtaposed in a horizontal direction. Each of the array antennas includes a plurality of antenna element pairs arranged in a vertical direction. Each of the antenna element pairs includes two antenna elements having polarization characteristics perpendicular to each other. A shield plate is provided between the two array antennas. The plurality of antenna element pairs of each of the two array antennas are classified into a first group of M-antenna element pairs, a second group of N-antenna element pairs, and a third group of P-antenna element pairs from one end to another end of the two array antennas (M, N, and P are positive integers, respectively).Type: ApplicationFiled: March 11, 2011Publication date: May 10, 2012Applicant: HITACHI CABLE, LTD.Inventors: Takayuki Shimizu, Shinsuke Murano, Ryota Suzuki, Osamu Tasaki, Tomoyuki Ogawa
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Publication number: 20120062440Abstract: A mobile communication base station antenna has a first array antenna and a second array antenna. Antenna elements of the first and second array antennas are classified into the first, second and third groups G1, G2 and G3. A first feeding port is connected to the antenna elements in the odd number groups (the first group G1 and the third group G3) of the first array antenna and the antenna elements in the even number group of the second array antenna. On the other hand, a second feeding port is connected to the antenna elements in the even number group (the second group G2) of the first array antenna and the antenna elements in the odd number groups (the first group G1 and the third group G3) of the second array antenna.Type: ApplicationFiled: September 14, 2011Publication date: March 15, 2012Applicant: HITACHI CABLE, LTD.Inventors: Osamu TASAKI, Tomoyuki OGAWA, Takayuki SHIMIZU, Shinsuke MURANO, Ryota SUZUKI
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Publication number: 20100227647Abstract: A mobile communication base station antenna has a plurality of polarization diversity antenna blocks, each of the polarization diversity antenna blocks including a plurality of polarization diversity antenna elements, each of the polarization diversity antenna elements including antenna elements that are disposed to be orthogonal to each other. The polarization diversity antenna elements of one of the polarization diversity antenna blocks are interposed between the polarization diversity antenna elements of another one of the polarization diversity antenna blocks, and tilt angles in the vertical plane of the respective polarization diversity antenna blocks are different from each other.Type: ApplicationFiled: March 2, 2010Publication date: September 9, 2010Applicant: HITACHI CABLE, LTD.Inventors: Takayuki Shimizu, Shinsuke Murano, Osamu Tasaki
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Publication number: 20100227646Abstract: A mobile communication base station antenna has a plurality of array antennas. Each of the array antennas has an antenna element pair array including a plurality of antenna element pairs arranged in a vertical plane. Each of the antenna element pairs has two antenna elements having polarization characteristics orthogonal to each other. Two feeding points are provided for feeding an electric power to the two antenna elements respectively. The array antennas are arranged in a vertical plane, and the antenna element pairs included in one of the array antennas and the antenna element pairs included in other of the array antennas are arranged alternately, at least in a part between the array antennas adjacent to each other.Type: ApplicationFiled: March 2, 2010Publication date: September 9, 2010Applicant: HITACHI CABLE, LTD.Inventors: Tomoyuki Ogawa, Shinsuke Murano, Osamu Tasaki, Takayuki Shimizu