Patents by Inventor Changsoo Kwak
Changsoo Kwak 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: 11946154Abstract: Provided are a dielectric material, a device including the dielectric material, and a method of preparing the dielectric material, in which the dielectric material may include: a layered perovskite compound, wherein the layered perovskite compound may include at least one selected from a Dion-Jacobson phase, an Aurivillius phase, and a Ruddlesden-Popper phase, a temperature coefficient of capacitance (TCC) of a capacitance at 200° C. with respect to a capacitance at 40° C. may be in a range of about ?15 percent (%) to about 15%, and a permittivity of the dielectric material may be 200 or greater in a range of about 1 kilohertz (kHz) to about 1 megahertz (MHz).Type: GrantFiled: December 18, 2020Date of Patent: April 2, 2024Assignee: Samsung Electronics Co., Ltd.Inventors: Hyungjun Kim, Chan Kwak, Takayoshi Sasaki, Yasuo Ebina, Changsoo Lee, Dohwon Jung, Giyoung Jo, Takaaki Taniguchi
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Patent number: 11742560Abstract: A T-junction with high isolation and a method for fabricating the same are provided. The T-junction includes a power divider/combiner configured to divide or combine power, a dielectric substrate disposed perpendicular to a lower plane of the power divider/combiner, and a dielectric holder configured to dispose the dielectric substrate.Type: GrantFiled: December 18, 2020Date of Patent: August 29, 2023Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventor: Changsoo Kwak
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Publication number: 20210194107Abstract: A T-junction with high isolation and a method for fabricating the same are provided. The T-junction includes a power divider/combiner configured to divide or combine power, a dielectric substrate disposed perpendicular to a lower plane of the power divider/combiner, and a dielectric holder configured to dispose the dielectric substrate.Type: ApplicationFiled: December 18, 2020Publication date: June 24, 2021Inventor: Changsoo KWAK
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Patent number: 10727556Abstract: Disclosed is a multimode microwave filter including a resonator in which a cavity is formed to generate a resonant mode and a plurality of irises formed on a side surface of the resonator, in which the cavity of the resonator has a rhombus-shaped cross section.Type: GrantFiled: October 19, 2018Date of Patent: July 28, 2020Assignee: Electronics and Telecommunications Research InstituteInventors: Changsoo Kwak, In Bok Yom, So-hyeun Yun, Hongyeol Lee
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Publication number: 20200153106Abstract: An integrated horn antenna with an integral polarization converter, and a method of manufacturing the integrated horn antenna are disclosed. The integrated horn antenna includes a horn, and a polarizer of which at least a portion is disposed in an internal space defined by an inner wall of the horn.Type: ApplicationFiled: August 16, 2019Publication date: May 14, 2020Applicant: Electronics and Telecommunications Research InstituteInventors: So-hyeun YUN, Changsoo KWAK, Man Seok UHM, Hongyeol LEE, Dong Pil CHANG
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Publication number: 20190252748Abstract: Disclosed is a multimode microwave filter including a resonator in which a cavity is formed to generate a resonant mode and a plurality of irises formed on a side surface of the resonator, in which the cavity of the resonator has a rhombus-shaped cross section.Type: ApplicationFiled: October 19, 2018Publication date: August 15, 2019Applicant: Electronics and Telecommunications Research InstituteInventors: Changsoo KWAK, IN BOK YOM, So-hyeun YUN, Hongyeol LEE
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Patent number: 10211500Abstract: Disclosed is a tunable low-pass filter using a dual mode including a cylindrical cavity configured to trigger a resonant mode, a plurality of irises formed on a lateral face of the cylindrical cavity, and a dummy iris formed on the lateral face of the cylindrical cavity, wherein the resonant mode includes a plurality of modes having a plurality of resonant frequencies, and differences in resonance frequency between the plurality of modes are determined based on angles between the plurality of irises based on an axis of the cylindrical cavity.Type: GrantFiled: February 24, 2017Date of Patent: February 19, 2019Assignee: Electronics and Telecommunications Research InstituteInventor: Changsoo Kwak
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Publication number: 20180138571Abstract: Disclosed is a tunable low-pass filter using a dual mode including a cylindrical cavity configured to trigger a resonant mode, a plurality of irises formed on a lateral face of the cylindrical cavity, and a dummy iris formed on the lateral face of the cylindrical cavity, wherein the resonant mode includes a plurality of modes having a plurality of resonant frequencies, and differences in resonance frequency between the plurality of modes are determined based on angles between the plurality of irises based on an axis of the cylindrical cavity.Type: ApplicationFiled: February 24, 2017Publication date: May 17, 2018Applicant: Electronics and Telecommunications Research InstituteInventor: Changsoo KWAK
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Publication number: 20180123211Abstract: Disclosed is a radio frequency low-loss power divider/combiner and power amplifier including the same, the power divider/combiner including a waveguide and a converter configured to convert an input signal received from an input signal terminal into a plurality of output signals and output the plurality of output signals to a plurality of output signal terminals corresponding to the plurality of output signals through the waveguide, wherein the waveguide includes the converter.Type: ApplicationFiled: May 2, 2017Publication date: May 3, 2018Applicant: Electronics and Telecommunications Research Instit uteInventors: Dong Pil CHANG, Hongyeol LEE, Changsoo KWAK, Dong Hwan SHIN, In Bok YOM, Jin Cheol JEONG
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Patent number: 9905903Abstract: A resonator filter according to a first exemplary embodiment of the present invention includes: a cover formed with a first coupling hole; a housing connected to the cover to form an inner space and having a second coupling hole formed at a bottom of the inner space; a dielectric material mounted around the second coupling hole in the bottom of the inner space of the housing; a first rod inserted to the first coupling hole to be connected to the cover and pressing the dielectric material; and a second rod inserted to the second coupling hole to be connected to the housing to be close to the dielectric material and tuning a resonance frequency by controlling a separation distance from the first rod.Type: GrantFiled: January 7, 2016Date of Patent: February 27, 2018Assignee: Electronics and Telecommunications Research InstituteInventors: Changsoo Kwak, Man Seok Uhm
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Publication number: 20160294030Abstract: A resonator filter according to a first exemplary embodiment of the present invention includes: a cover formed with a first coupling hole; a housing connected to the cover to form an inner space and having a second coupling hole formed at a bottom of the inner space; a dielectric material mounted around the second coupling hole in the bottom of the inner space of the housing; a first rod inserted to the first coupling hole to be connected to the cover and pressing the dielectric material; and a second rod inserted to the second coupling hole to be connected to the housing to be close to the dielectric material and tuning a resonance frequency by controlling a separation distance from the first rod.Type: ApplicationFiled: January 7, 2016Publication date: October 6, 2016Inventors: Changsoo KWAK, Man Seok UHM
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Patent number: 8797122Abstract: A butler matrix includes at least one input coupler that is positioned at an input end of the butler matrix, receives an input signal, and divides and outputs it to a plurality of paths, and at least one output coupler that receives a signal from the input coupler and divides the signal into a plurality of paths to output it as an output signal. A separation coupler is formed in an intersecting path including an intersecting section at which transmission paths intersect among a plurality of paths through which a signal is transmitted to separate signals transmitted through different transmission paths. Further, a compensation coupler is formed in a path excluding the intersecting path to compensate a phase difference.Type: GrantFiled: September 11, 2012Date of Patent: August 5, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Hongyeol Lee, Man Seok Uhm, So-hyeun Yun, ChangSoo Kwak, Jang-sup Choi, In Bok Yom
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Patent number: 8422232Abstract: A system for controlling temperature of an antenna module including a heat generating module, and a radome and an underbody cover that enclose the heat generating module. The system includes: a heat collecting unit mounted on inner surface of the antenna module; a heat discharging unit mounted on outer surface of the antenna module; and a heat transfer unit for transferring heat from the heat collecting unit to the heat discharging unit.Type: GrantFiled: July 21, 2009Date of Patent: April 16, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Changsoo Kwak, In-Bok Yom, So-Hyeun Yun, Donghwan Shin, Ho-Jin Lee
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Patent number: 8410872Abstract: Provided is a line filter. The line filter includes a plurality of dielectric layers stacked one another, a plurality of line resonator each comprising transmission lines on at least two of the dielectric layers, and a tuning unit adjusting a binding amount and resonance frequency of the line resonators. Since the line filter includes at least one line resonator on at least two stacked dielectric layers, the integration can be easily realized. Further, since the line filter can be adjusted even after the line filter is manufacture, the line filter has an excellent frequency property. Since the line filter is realized on the plurality of the dielectric layers, the frequency band can be widened.Type: GrantFiled: June 25, 2010Date of Patent: April 2, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Man Seok Uhm, Changsoo Kwak, Youn Sub Noh, In Bok Yom
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Publication number: 20130076565Abstract: A butler matrix includes at least one input coupler that is positioned at an input end of the butler matrix, receives an input signal, and divides and outputs it to a plurality of paths, and at least one output coupler that receives a signal from the input coupler and divides the signal into a plurality of paths to output it as an output signal. A separation coupler is formed in an intersecting path including an intersecting section at which transmission paths intersect among a plurality of paths through which a signal is transmitted to separate signals transmitted through different transmission paths. Further, a compensation coupler is formed in a path excluding the intersecting path to compensate a phase difference.Type: ApplicationFiled: September 11, 2012Publication date: March 28, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Hongyeol LEE, Man Seok UHM, So-hyeun YUN, ChangSoo KWAK, Jang-sup CHOI, In Bok YOM
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Patent number: 8314667Abstract: A coupled line filter includes: a first line resonator connected input port and a second line resonator connected with output port each having an electrical length of 270° at a predetermined center frequency, the first and second line resonators being disposed parallel to each other; and a third line resonator including one or more line resonators disposed between the first line resonator and the second line resonator, each line resonator having an electrical length of 90° at the center frequency and a first side aligned with first sides of the first line resonator and the second line resonator, wherein an order of the coupled line filter is determined by summing the number of the line resonators included in the third line resonator and the first and second line resonators.Type: GrantFiled: October 28, 2009Date of Patent: November 20, 2012Assignee: Electronics and Telecommunications Research InstituteInventors: Man-Seok Uhm, Youn-Sub Noh, Changsoo Kwak, So-Hyeun Yun, Kiburm Ahn, In-Bok Yom
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Publication number: 20120235874Abstract: A deployable reflectarray antenna includes a plurality of reflectarray antenna panels each having one edge connected to be folded and unfolded. Each reflectarray antenna panel includes a membrane having reflecting elements and a support frame. The support frame includes outer frames surrounding edges of the membrane, and a plurality of reinforcing members disposed in a vertical direction between the outer frames in a length direction.Type: ApplicationFiled: March 7, 2012Publication date: September 20, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: ChangSoo KWAK, Man Seok UHM, Jang-sup CHOI, So-hyeun YUN, In Bok YOM, Hongyeol LEE
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Patent number: 8066445Abstract: An apparatus for adjusting the length of a tension tie mounted on a deployable antenna based on a cable network structure includes a cable retainer provided with a retaining hole, a cable being connected to the cable retainer; a retaining case coupled to the outer periphery of the cable retainer and provided with a plurality of retaining holes; and a retainer positioned inside the cable retainer and configured to extend through the retaining hole of the cable retainer and through one of the retaining holes of the retaining case so that the cable retainer and the retaining case are prevented from moving in the longitudinal direction.Type: GrantFiled: June 18, 2010Date of Patent: November 29, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Changsoo Kwak, Man-Seok Uhm, Dong-Hwan Shin, In-Bok Yom
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Publication number: 20110199141Abstract: Provided is a phase shifter having a high phase difference in a microwave band. The phase shifter includes a first phase shifting unit configured to receive an input signal having a predetermined frequency, receive a first control signal and a second control signal operating contrary to the first control signal, output the input signal as it is when the first control signal is activated, and output the input signal to have a lead phase as much as a predetermined phase, and a second phase shifting unit configured to receive a second signal outputted from the first phase shifting unit, receive the first control signal and the second control signal, output the second signal to have a lagged phase as much as a predetermined phase when the first control signal is activated, and output the second signal as it is when the second control signal is activated.Type: ApplicationFiled: September 15, 2009Publication date: August 18, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Donghwan Shin, Changsoo Kwak, So-Hyeun Yun, In-Bok Yom
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Publication number: 20110148548Abstract: Provided is a line filter. The line filter includes a plurality of dielectric layers stacked one another, a plurality of line resonator each comprising transmission lines on at least two of the dielectric layers, and a tuning unit adjusting a binding amount and resonance frequency of the line resonators. Since the line filter includes at least one line resonator on at least two stacked dielectric layers, the integration can be easily realized. Further, since the line filter can be adjusted even after the line filter is manufacture, the line filter has an excellent frequency property. Since the line filter is realized on the plurality of the dielectric layers, the frequency band can be widened.Type: ApplicationFiled: June 25, 2010Publication date: June 23, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Man Seok Uhm, Changsoo Kwak, Youn Sub Noh, In Bok Yom