Patents by Inventor Dong-Uk Sim
Dong-Uk Sim 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: 20230420823Abstract: Provided is a mode stirring device. The mode stirring device includes a transmission antenna configured to output a wireless signal to measure wireless performance in an electromagnetic (EM) wave reverberation chamber, an antenna connection bar having one end coupled to a lower end of the transmission antenna, a crankshaft connected to another end of the antenna connection bar, and a motor configured to change a position of the transmission antenna by rotating the crankshaft.Type: ApplicationFiled: February 9, 2023Publication date: December 28, 2023Inventors: Dong-Uk SIM, Sangil KWAK, Seung Keun PARK, Hyeyeon KWON
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Publication number: 20230384360Abstract: Provided is a wireless channel reproduction device having a structure of an reverberation chamber. More specifically, the wireless channel reproduction device may minimize a measurement uncertainty by satisfying recommendations on spatial uniformity or field uniformity of a working volume and may be designed as an internal structure of an reverberation chamber including a plurality of mode agitators.Type: ApplicationFiled: March 10, 2023Publication date: November 30, 2023Applicant: Electronics and Telecommunications Research InstituteInventors: Dong-Uk SIM, Sangil KWAK, Seung Keun PARK, Hyeyeon KWON
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Patent number: 10928432Abstract: 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.Type: GrantFiled: October 22, 2018Date of Patent: February 23, 2021Assignee: Electronics and Telecommunications Research InstituteInventors: Dong-Uk Sim, Sang il Kwak, Jong Hwa Kwon
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Patent number: 10598711Abstract: 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.Type: GrantFiled: September 27, 2017Date of Patent: March 24, 2020Assignee: Electronics and Telecommunications Research InstituteInventors: Dong-Uk Sim, Sang il Kwak, Jong Hwa Kwon
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Publication number: 20190339315Abstract: 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.Type: ApplicationFiled: October 22, 2018Publication date: November 7, 2019Applicant: Electronics and Telecommunications Research InstituteInventors: Dong-Uk SIM, Sang il KWAK, JONG HWA KWON
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Publication number: 20180231593Abstract: 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.Type: ApplicationFiled: September 27, 2017Publication date: August 16, 2018Applicant: Electronics and Telecommunications Research InstituteInventors: Dong-Uk SIM, Sang il KWAK, Jong Hwa KWON
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Patent number: 9960860Abstract: Provided is a cover accessory for a wireless communication device, including an 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.Type: GrantFiled: February 16, 2016Date of Patent: May 1, 2018Assignee: Electronics and Telecommunications Research InstituteInventors: Dong-Uk Sim, Sang il Kwak, Jong Hwa Kwon
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Publication number: 20170317424Abstract: A structure of absorbing multi-band electromagnetic waves, having an effective function of absorbing electromagnetic waves while maintaining a precise alignment of two or more films includes a first dielectric portion, a first resistive pattern portion, a second dielectric portion, and a second resistive pattern portion. An apparatus and method for freely controlling an electromagnetic wave absorbance area, which has an effect of efficiently absorbing or reducing electromagnetic waves of various frequency bands, thereby leading to ease in maintenance and repair.Type: ApplicationFiled: August 22, 2016Publication date: November 2, 2017Inventors: Dong Uk SIM, Sang Il KWAK, Jong Hwa KWON
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Publication number: 20160241690Abstract: Provided is a cover accessory for a wireless communication device, including an 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.Type: ApplicationFiled: February 16, 2016Publication date: August 18, 2016Inventors: Dong-Uk SIM, Sang il KWAK, JONG HWA KWON
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Patent number: 9276325Abstract: An electromagnetic wave reverberation chamber formed in the shape of a polyhedron includes an electromagnetic wave absorbing apparatus installed on at least one wall of metal conductors of the electromagnetic wave reverberation chamber. The electromagnetic wave absorbing apparatus having a shape of a roll screen and includes an electromagnetic wave absorbing film, a roll for rolling the one end of the electromagnetic wave absorbing film, a cover for covering the roll, and a fixing unit for fixing the other end of the electromagnetic wave absorbing film.Type: GrantFiled: August 21, 2012Date of Patent: March 1, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventor: Dong-Uk Sim
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Patent number: 9035817Abstract: An electromagnetic wave reverberation chamber includes: an electromagnetic wave absorbing apparatus installed in an intended space of the electromagnetic wave reverberation chamber for adjusting a reflection characteristic of an inside of the electromagnetic wave reverberation chamber, wherein the electromagnetic wave absorbing apparatus have an electromagnetic bandgap structure including a plurality of unit cells arranged periodically.Type: GrantFiled: December 22, 2011Date of Patent: May 19, 2015Assignee: Electronics and Telecommunications Research InstituteInventor: Dong-Uk Sim
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Patent number: 9030373Abstract: A method of manufacturing a transparent film for reducing electromagnetic waves includes forming a first dielectric layer and forming a pattern layer on the first dielectric layer. The pattern layer is made of a transparent electrode material having surface resistance.Type: GrantFiled: October 5, 2012Date of Patent: May 12, 2015Assignee: Electronics and Telecommunications Research InstituteInventor: Dong-Uk Sim
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Patent number: 8929842Abstract: An apparatus for use in a communication device with an antenna protects a body from electromagnetic fields. The apparatus includes a sensing unit to sense a surrounding environment of the communication device, a variable element to perform a variable operation according to a voltage or current applied thereto. The apparatus further includes a variable element control unit to control the voltage or current according to the surrounding environment sensed by the sensing unit to cause the variable element to perform the variable operation, and an intelligent periodic structure coupled with the variable element, the intelligent periodic structure being configured to change an operation frequency of the wireless communication device according to the variable operation of the variable element and adjust a radiation pattern direction of the antenna.Type: GrantFiled: September 5, 2012Date of Patent: January 6, 2015Assignee: Electronics and Telecommunications Research InstituteInventors: Sang il Kwak, Jong Hwa Kwon, Dong-Uk Sim
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Patent number: 8890101Abstract: An electromagnetic wave absorbing device includes a ground layer formed of a metal conductor layer, a dielectric layer formed on the ground layer, and a unit cell pattern layer which is formed on the dielectric layer and made of resistive materials, wherein at least two electromagnetic bandgap-based unit cell patterns are periodically arranged on the unit cell pattern layer.Type: GrantFiled: December 5, 2011Date of Patent: November 18, 2014Assignee: Electronics and Telecommunications Research InstituteInventor: Dong-Uk Sim
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Patent number: 8797107Abstract: A voltage controlled oscillator includes a split ring resonator (SRR) configured to have meta-material characteristics fabricated on a board, and an energy compensation circuit configured to cause resonant oscillation of the SRR. The energy compensation circuit is fabricated in the form of an integrated circuit.Type: GrantFiled: December 13, 2012Date of Patent: August 5, 2014Assignees: Electronics and Telecommunications Research Institute, Soongsil University-Industry Cooperation FoundationInventors: Dong-Uk Sim, Young Jun Chong, Yong Moon, Hyeon Seok Jang
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Publication number: 20130277579Abstract: An electromagnetic wave absorbing device includes a ground layer formed of a metal conductor layer, a dielectric layer formed on the ground layer, and a unit cell pattern layer which is formed on the dielectric layer and made of resistive materials, wherein at least two electromagnetic bandgap-based unit cell patterns are periodically arranged on the unit cell pattern layer.Type: ApplicationFiled: December 5, 2011Publication date: October 24, 2013Applicant: Electronics and Telecommunications Research InstituteInventor: Dong-Uk Sim
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Patent number: 8558120Abstract: A multilayer board for suppressing unwanted electromagnetic waves and noise includes: a power plane and a ground plane constituting a power distribution network; an electromagnetic wave suppression structure placed on the power plane or the ground plane; and a decoupling capacitor placed on the power plane or the ground plane, wherein the electromagnetic wave suppression structure and the decoupling capacitor are placed together.Type: GrantFiled: December 20, 2010Date of Patent: October 15, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Jong Hwa Kwon, Dong-Uk Sim, Sang Il Kwak
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Publication number: 20130059550Abstract: An apparatus for use in a communication device with an antenna protects a body from electromagnetic fields. The apparatus includes a sensing unit to sense a surrounding environment of the communication device, a variable element to perform a variable operation according to a voltage or current applied thereto. The apparatus further includes a variable element control unit to control the voltage or current according to the surrounding environment sensed by the sensing unit to cause the variable element to perform the variable operation, and an intelligent periodic structure coupled with the variable element, the intelligent periodic structure being configured to change an operation frequency of the wireless communication device according to the variable operation of the variable element and adjust a radiation pattern direction of the antenna.Type: ApplicationFiled: September 5, 2012Publication date: March 7, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Sang il KWAK, Jong Hwa KWON, Dong-Uk SIM
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Publication number: 20130050006Abstract: An electromagnetic wave reverberation chamber formed in the shape of a polyhedron includes an electromagnetic wave absorbing apparatus installed on at least one wall of metal conductors of the electromagnetic wave reverberation chamber. The electromagnetic wave absorbing apparatus having a shape of a roll screen and includes an electromagnetic wave absorbing film, a roll for rolling the one end of the electromagnetic wave absorbing film, a cover for covering the roll, and a fixing unit for fixing the other end of the electromagnetic wave absorbing film.Type: ApplicationFiled: August 21, 2012Publication date: February 28, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventor: Dong-Uk SIM
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Patent number: 8325104Abstract: Provided are a dipole tag antenna using an artificial magnetic conductor (AMC) for wireless identification and a wireless identification system using the dipole tag antenna. The dipole tag antenna includes: a substrate formed of a first dielectric material; a conductive ground layer formed underneath the substrate; an AMC layer formed on the substrate; the dipole tag antenna mounted on the AMC layer and comprising a wireless identification chip; and the AMC directly mounted on a conductor.Type: GrantFiled: October 31, 2007Date of Patent: December 4, 2012Assignee: Electronics and Telecommunications Research InstituteInventors: Dong-Uk Sim, Hyung-Do Choi, Jong-Hwa Kwon, Dong-Ho Kim, Jae-Ick Choi