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公开(公告)号：US10079436B2
公开(公告)日：2018-09-18
申请号：US15110945
申请日：2015-02-04
发明人： Takeshi Okunaga , Akira Nakatsu
CPC分类号： H01Q21/065 , H01P5/12 , H01Q5/50 , H01Q21/0075
摘要： [Object] To improve the directional characteristics of a planar antenna for a milliwave band as well as widening a bandwidth.[Means for Settlement] A feed line 13 has a main feed line 21, two sub-feed lines 22, and a distributor S2 adapted to branch the main feed line 21 into the two sub-feed lines 22. The distributor S2 includes: two outer edges 30L and 30R formed as curved lines connecting both side edges 21L and 21R of the main feed line 21 to first edges 221 of the sub-feed lines 22; and an inner edge 31 connecting second edges 222 of the sub-feed lines 22 to each other, in which the inner edge 31 is configured to include two inner curved lines 31L and 31R that are convex in mutual directions, and has a pointed shape that is concave toward the main feed line 21 side.
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公开(公告)号：US20140306846A1
公开(公告)日：2014-10-16
申请号：US14252009
申请日：2014-04-14
发明人： Akira Nakatsu , Koji Onishi
IPC分类号： H01Q9/04
CPC分类号： H01Q21/0075 , H01Q21/08 , H01Q21/29 , H01Q21/30
摘要： To provide a microstrip antenna that can radiate electromagnetic waves in two or more different directions while suppressing an increase in manufacturing cost. The microstrip antenna is configured to include: a dielectric substrate 10 that is adapted to be of a folded flat plate shape; two or more radiating patterns 2 for radiating electromagnetic waves; and a connecting pattern 3 for mutually connecting the radiating patterns 2 and feeding electricity from a common feeding point 4 to each of the radiating patterns 2. The radiating patterns 2 and connecting pattern 3 are respectively adapted as microstrip lines formed on the dielectric substrate 10, and the dielectric substrate 10 is folded such that the connecting pattern 3 intersects with a ridge line 5, and has two or more radiating surfaces 10a to 10c of which normal directions are mutually different.
摘要翻译： 提供一种能够抑制制造成本增加的同时在两个以上的不同方向发射电磁波的微带天线。 微带天线被配置为包括：电介质基板10，其适于折叠的平板形状; 用于辐射电磁波的两个或更多辐射图案2; 以及用于将辐射图案2相互连接并从公共馈电点4馈送到每个辐射图案2的连接图案3.辐射图案2和连接图案3分别适合于形成在电介质基板10上的微带线， 并且电介质基板10被折叠成使得连接图案3与棱线5相交，并且具有两个或更多个法向相互不同的辐射表面10a至10c。
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公开(公告)号：US11802863B2
公开(公告)日：2023-10-31
申请号：US16966443
申请日：2019-01-30
摘要： An oil condition determination system includes a resistance value measurement unit and a determination unit. The resistance value measurement unit applies a measurement voltage between a pair of measurement electrodes in contact with oil to measure a resistance value of the oil. The determination unit determines, when a change tendency of the resistance value of the oil is reversed, that condition of the oil is changed.
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公开(公告)号：US11692861B2
公开(公告)日：2023-07-04
申请号：US17514731
申请日：2021-10-29
发明人： Akira Nakatsu , Kentaro Watanabe
IPC分类号： G01F23/26 , G01F23/263 , G01N27/22
CPC分类号： G01F23/268 , G01N27/226 , G01N27/223
摘要： Provided is a liquid sensor or the like that is relatively easy to manufacture. The liquid sensor includes a light emitting element, an optical waveguide, a light receiving element, and a detection circuit. The optical waveguide includes a first pillar portion, a first metal plate, a second pillar portion, and a second metal plate. The first metal plate is embedded in the first pillar portion. The second pillar portion is provided at a position opposing the first pillar portion. The second metal plate is embedded in the second pillar portion. A space for liquid is formed between the first pillar portion and the second pillar portion. The first pillar portion includes a first end surface that faces the light emitting element. The first metal plate includes a first reflecting portion that is tilted relative to the first end surface and reflects light toward the second pillar portion. The second pillar portion includes a second end surface that faces the light receiving element. The second metal plate includes a second reflecting portion that is tilted relative to the second end surface and reflects the light from the first metal plate toward the light receiving element.
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公开(公告)号：US09627775B2
公开(公告)日：2017-04-18
申请号：US14252009
申请日：2014-04-14
发明人： Akira Nakatsu , Koji Onishi
CPC分类号： H01Q21/0075 , H01Q21/08 , H01Q21/29 , H01Q21/30
摘要： To provide a microstrip antenna that can radiate electromagnetic waves in two or more different directions while suppressing an increase in manufacturing cost. The microstrip antenna is configured to include: a dielectric substrate 10 that is adapted to be of a folded flat plate shape; two or more radiating patterns 2 for radiating electromagnetic waves; and a connecting pattern 3 for mutually connecting the radiating patterns 2 and feeding electricity from a common feeding point 4 to each of the radiating patterns 2. The radiating patterns 2 and connecting pattern 3 are respectively adapted as microstrip lines formed on the dielectric substrate 10, and the dielectric substrate 10 is folded such that the connecting pattern 3 intersects with a ridge line 5, and has two or more radiating surfaces 10a to 10c of which normal directions are mutually different.
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