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公开(公告)号：US09730369B2
公开(公告)日：2017-08-08
申请号：US15042722
申请日：2016-02-12
发明人： Sang il Kwak , Jong Hwa Kwon , Hyun Ho Park
IPC分类号： H05K9/00
CPC分类号： H05K9/0075
摘要： Provided is a magnetic shielding sheet. The magnetic shielding sheet according to an embodiment of the inventive concept may include a magnetic sheet including a magnetic material, a plurality of first metal strips provided on the magnetic sheet in a first direction, and a plurality of second metal strips provided on the magnetic sheet in a second direction different from the first direction. According to the inventive concept, a magnetic field applied from the outside may be efficiently shielded by properly arranging the metal strips on the magnetic sheet.
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公开(公告)号：US09841470B2
公开(公告)日：2017-12-12
申请号：US14997217
申请日：2016-01-15
发明人： Jung Hwan Hwang , Jong Hwa Kwon
CPC分类号： G01R33/0206 , G01R33/0005
摘要： Provided is a magnetic field measuring device including a first sensor unit which includes a first coil sensor configured to output a first sensor signal, a second sensor unit which includes a second coil sensor configured to output a second sensor signal and disposed in a direction perpendicular to the first coil sensor, a third sensor unit which includes a third coil sensor configured to output a third sensor signal and disposed in a direction perpendicular to the first and second coil sensors, and a digital signal processor outputs magnetic flux density based on a voltage difference between the first and fourth nodes, wherein the first to third sensor units respectively output first to third output signals in which specific voltages of the first to third sensor signals are maintained for a predetermined period of time.
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3.发明授权Method of preparing carbon nanotube composite surface having metal particles 有权制备具有金属颗粒的碳纳米管复合材料表面的方法公开(公告)号：US09181278B2
公开(公告)日：2015-11-10
申请号：US14322533
申请日：2014-07-02
发明人： Jong Hwa Kwon , Ho Gyu Yoon , Kwang Se Lee
CPC分类号： C07F1/005 , B82Y30/00 , B82Y40/00 , C07B2200/11 , C07F7/0838 , C08G77/26 , C09D183/08
摘要： A method of preparing a carbon nanotube composite with metal particles on a surface thereof, including: introducing an acylhalide group to the surface, causing a reaction of the acylhalide group with an amine group of a polysiloxane to bond the polysiloxane to the surface by the amide groups, and introducing metal particles to other functional groups of the polysiloxane to bond the metal particles to the surface of the carbon nanotube composite.
摘要翻译： 一种在其表面上制备具有金属颗粒的碳纳米管复合材料的方法，包括：将酰卤基团引入表面，引起酰卤基团与聚硅氧烷的胺基反应，以通过酰胺将聚硅氧烷与表面键合 并且将金属颗粒引入聚硅氧烷的其它官能团以将金属颗粒结合到碳纳米管复合材料的表面。
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公开(公告)号：US10928432B2
公开(公告)日：2021-02-23
申请号：US16167302
申请日：2018-10-22
发明人： Dong-Uk Sim , Sang il Kwak , Jong Hwa Kwon
摘要： Provided a reverberation chamber including a pair of a transmitting and receiving antenna and a reflection plate configured to reflect an electromagnetic wave output from the transmitting and receiving antenna to a working volume in a beam direction to improve a field uniformity of the working volume in the reverberation chamber and increase an applicability of the reverberation chamber.
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公开(公告)号：US10598711B2
公开(公告)日：2020-03-24
申请号：US15717407
申请日：2017-09-27
发明人： Dong-Uk Sim , Sang il Kwak , Jong Hwa Kwon
摘要： Disclosed is an electromagnetic wave reverberation chamber including a column-type mode stirrer including a plurality of plate-shaped electromagnetic wave reflectors connected by a metal column provided on a bottom of the electromagnetic wave reverberation chamber, a ceiling-type mode stirrer including a plurality of plate-shaped electromagnetic wave reflectors connected by a metal column provided on a wall surface of the electromagnetic wave reverberation chamber and disposed around a ceiling of the electromagnetic wave reverberation chamber, and a pyramidal mode stirrer including a plurality of pyramid-shaped electromagnetic wave reflectors and disposed on a wall surface of the electromagnetic wave reverberation chamber.
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公开(公告)号：US11041895B1
公开(公告)日：2021-06-22
申请号：US16851411
申请日：2020-04-17
摘要： A probe antenna, a probing system, and a power density measuring method to measure a power density of a near-field electromagnetic field are disposed. The probe antenna includes a board, and a conductor transmitting line formed on the board, having a constant line width, and formed in a polygonal shape or in a closed-curve shape. The conductor transmitting line is divided into a first transmitting line and a second transmitting line that are separated from each other, and includes a first receiving port formed with one end of the first transmitting line and one end of the second transmitting line and a second receiving port formed with another end of the first transmitting line and another end of the second transmitting line.
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公开(公告)号：US09960860B2
公开(公告)日：2018-05-01
申请号：US15044480
申请日：2016-02-16
发明人： Dong-Uk Sim , Sang il Kwak , Jong Hwa Kwon
CPC分类号： H04B15/02 , H05K9/0086
摘要： Provided is a cover accessory for a wireless communication device, includingan electromagnetic suppressing pattern layer on a surface adjoining at least one surface on which an electromagnetic wave is irradiated from the wireless communication device, wherein the electromagnetic suppressing pattern layer includes a first dielectric layer and a frequency selective surface (FSS) pattern with a unit cell having electromagnetic surface resistance periodically repeated thereon, and the FSS pattern is provided by etching the first dielectric layer to inject an FSS pattern material or by printing the FSS pattern material on the first dielectric layer.
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公开(公告)号：US11747380B2
公开(公告)日：2023-09-05
申请号：US17734298
申请日：2022-05-02
发明人： Chang Hee Hyoung , Jong Hwa Kwon , Jung Hwan Hwang
CPC分类号： G01R29/0821 , G01R31/001 , H01Q15/18
摘要： An apparatus for electromagnetic wave evaluation may include: an electromagnetic wave non-reflecting outer structure in which electromagnetic wave absorbers are installed on interior walls and an evaluation space is formed therein; a building-simulating structure which is installed in the evaluation space inside the electromagnetic wave non-reflecting outer structure and in which electromagnetic wave absorbers capable of adjusting a quality factor are installed; a transmitting end installed inside or outside the building-simulating structure in the evaluation space and transmitting an electromagnetic wave; and a receiving end installed outside or inside the building-simulating structure in the evaluation space.
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公开(公告)号：US11668741B2
公开(公告)日：2023-06-06
申请号：US17547815
申请日：2021-12-10
发明人： Chang Hee Hyoung , Jong Hwa Kwon , Jung Hwan Hwang
CPC分类号： G01R29/105
摘要： An electromagnetic wave measurement system may include: a reference receiving device; a plurality of auxiliary receiving devices; and a control device connected to the reference receiving device and the plurality of auxiliary receiving devices, wherein the reference receiving device has a wider dynamic range than the plurality of auxiliary receiving devices, the control device collects a frequency-specific measurement value from each of the reference receiving device and the plurality of auxiliary receiving devices, and the frequency-specific measurement value of each of the auxiliary receiving devices is calibrated based on the frequency-specific measurement value of the reference receiving device.
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10.发明授权公开(公告)号：US10581277B2
公开(公告)日：2020-03-03
申请号：US15428283
申请日：2017-02-09
发明人： Sang Bong Jeon , Jung Ick Moon , Sang-Won Kim , Seong-Min Kim , In Kui Cho , Jong Hwa Kwon , Byung Chan Kim , Hyung Do Choi
摘要： Provided is an apparatus for reducing an electromagnetic wave in a wireless power transmitter using a reducing coil, the apparatus that may cancel external emission of a magnetic field formed at a transmission coil using the reducing coil based on induced electromotive force.
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