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公开(公告)号：US09961647B2
公开(公告)日：2018-05-01
申请号：US15176804
申请日：2016-06-08
Inventor： Ae Kyoung Lee , Jong Hwa Kwon , Hyung Do Choi
IPC: H04B7/00 , H04W52/34 , H04B1/3827 , H04W24/08 , H04B17/27 , H04B17/318
CPC classification number: H04W52/346 , H04B1/3838 , H04B17/27 , H04B17/318 , H04W24/08
Abstract: A device for controlling exposure of electromagnetic waves from a base station collects a power value received from at least one base station together with position information using a plurality of terminals in a controlled area; maps the received power value collected from the terminals on a plurality of subareas in the controlled area based on position information collected from the terminals; calculates a power density for respective frequency bandwidths in the respective subareas by using the received power value of the terminals provided in the respective subareas; and calculates a specific absorption rate of electromagnetic waves in a human body in the respective subareas by using a power density value for respective frequency bandwidths in the respective subareas.
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12.发明授权Method and apparatus for reconstructing dielectric image using electromagnetic waves 有权使用电磁波重构电介质图像的方法和装置公开(公告)号：US09519054B2
公开(公告)日：2016-12-13
申请号：US14254439
申请日：2014-04-16
Inventor： Bo Ra Kim , Nikolai Simonov , Seong-Ho Son , Soon Ik Jeon , Hyuk Je Kim , Jong Moon Lee , Hyung Do Choi
CPC classification number: G01S13/89 , G01S13/88 , G01S13/887 , G01S13/888
Abstract: A method for reconstructing a dielectric image using electromagnetic waves, comprising: acquiring a measurement value of the electromagnetic waves; generating a matching system matrixes between the meshes; generating a smoothed dyadic Green's function matrix; generating an electromagnetic wave calculation value; calculating a misfit error between the acquired electromagnetic wave measurement value and the generated electromagnetic wave calculation value, and checking whether a change of the calculated misfit error satisfies a predetermined optimization determination condition; updating dielectric parameters at the meshes; and outputting a reconstructed dielectric image in the image reconstruction region.
Abstract translation: 一种使用电磁波重建电介质图像的方法，包括：获取电磁波的测量值; 在网格之间生成匹配系统矩阵; 产生一个平滑的二元格林函数矩阵; 产生电磁波计算值; 计算所获取的电磁波测量值与产生的电磁波计算值之间的误差误差，并且检查所计算的误差误差的变化是否满足预定的优化确定条件; 在网格上更新介质参数; 以及在所述图像重建区域中输出重构的电介质图像。
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Patent Agency Ranking
公开(公告)号：US11041895B1
公开(公告)日：2021-06-22
申请号：US16851411
申请日：2020-04-17
Inventor： Jung Hwan Hwang , Duk Soo Kwon , Chang Hee Hyoung , Jong Hwa Kwon , Hyung Do Choi
Abstract: 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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14.发明授权公开(公告)号：US10727701B2
公开(公告)日：2020-07-28
申请号：US16415117
申请日：2019-05-17
Inventor： Duk Ju Ahn , In Kui Cho , Seong Min Kim , Jung Ick Moon , Sang Bong Jeon , Byung Chan Kim , Je Hoon Yun , Dong Won Jang , Hyung Do Choi
Abstract: Provided is a wireless power reception apparatus which receives a power from a wireless power transmission apparatus. A wireless power reception apparatus which receives a power from a wireless power transmission apparatus, the wireless power reception apparatus comprising a duty controller configured to control a duty cycle; a power converter configured to convert an effective load resistance according to the duty cycle; a reception resonator configured to receive a power from a transmission coil of the wireless power transmission apparatus, wherein the duty cycle and a current of the transmission coil is adjusted based on a load resistance of the wireless power reception apparatus.
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公开(公告)号：US10483787B2
公开(公告)日：2019-11-19
申请号：US16265422
申请日：2019-02-01
Inventor： In Kui Cho , Seong Min Kim , Jung Ick Moon , Duk Ju Ahn , Je Hoon Yun , Hyung Do Choi , Dong Won Jang
Abstract: Provided is a wireless charging apparatus for performing wireless charging of an electronic device including a receiving coil located in a three-dimensional (3D) wireless charging zone using a plurality of transmitting coils arranged in the 3D wireless charging zone and at least one power source configured to supply a current to the plurality of transmitting coils.
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16.发明授权公开(公告)号：US10298066B2
公开(公告)日：2019-05-21
申请号：US15240043
申请日：2016-08-18
Inventor： Duk Ju Ahn , In Kui Cho , Seong Min Kim , Jung Ick Moon , Sang Bong Jeon , Byung Chan Kim , Je Hoon Yun , Dong Won Jang , Hyung Do Choi
Abstract: The wireless power reception apparatus includes: a duty controller configured to calculate an amount of current of a transmission coil required for the wireless power transmission apparatus and control a duty cycle by using at least one of distance information between the wireless power transmission apparatus and the wireless power reception apparatus or load current information; a power converter configured to convert an effective load resistance according to the duty cycle; a wireless data transmitter configured to transmit a signal that requires a control of the calculated amount of current of the transmission coil to the wireless power transmission apparatus; and a reception resonator configured to receive a power according to the amount of current of the transmission coil controlled by the signal that requires a control of the amount of current of the transmission coil from the wireless power transmission apparatus.
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公开(公告)号：US09814078B2
公开(公告)日：2017-11-07
申请号：US15065602
申请日：2016-03-09
Inventor： Seung Keun Park , Sungjin Yoo , Jung Sun Um , Hoiyoon Jung , Hyung Do Choi
CPC classification number: H04W74/085 , H04W84/12
Abstract: A wireless device of a communication system randomly selects a backoff counter at a contention window interval corresponding to a contention window size that is determined according to a backoff stage, attempts packet transmission, when the backoff counter becomes 0 while reducing the backoff counter, when a radio channel is in an idle status, and increases the contention window size while increasing the backoff stage by 1 according to a first predetermined condition. In this case, as the backoff stage increases, a contention window size has a concave down increasing form.
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