Patents by Inventor Jong Wan HEO
Jong Wan HEO 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: 20240145935Abstract: An antenna apparatus includes: a parabolic reflector; a dielectric support pedestal; a sub-reflector connected to an upper part of the dielectric support pedestal; and a waveguide connected to a lower part of the dielectric support pedestal, wherein the parabolic reflector has a curved surface in which a ratio of a focal length to a diameter is greater than a preset value, and at least one corrugation configured to suppress a cross polarization is formed in a region of the dielectric support pedestal.Type: ApplicationFiled: October 31, 2022Publication date: May 2, 2024Inventors: Byung Chul PARK, Seung Ho KIM, Kun Sup KWON, Jong Wan HEO, Sung Jae LEE, Ki Min HWANG
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Patent number: 11916292Abstract: According to the present disclosure, an antenna apparatus which includes a hollow pillar shaped waveguide extending in a first direction and at least one ridge protruding from an inner circumferential surface of the waveguide and extending in the first direction, wherein the ridge has at least one recessed groove formed in the first direction; and an antenna apparatus which includes the waveguide, the ridge and the iris structure protruding from the inner circumferential surface of the waveguide along a plane intersecting the first direction, are provided.Type: GrantFiled: February 2, 2023Date of Patent: February 27, 2024Assignee: AGENCY FOR DEFENSE DEVELOPMENTInventors: Byung Chul Park, Kun Sup Kwon, Jong Wan Heo
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Publication number: 20240063548Abstract: According to the present disclosure, an antenna apparatus which includes a hollow pillar shaped waveguide extending in a first direction and at least one ridge protruding from an inner circumferential surface of the waveguide and extending in the first direction, wherein the ridge has at least one recessed groove formed in the first direction; and an antenna apparatus which includes the waveguide, the ridge and the iris structure protruding from the inner circumferential surface of the waveguide along a plane intersecting the first direction, are provided.Type: ApplicationFiled: February 2, 2023Publication date: February 22, 2024Inventors: Byung Chul PARK, Kun Sup KWON, Jong Wan HEO
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Patent number: 11831074Abstract: The embodiments generally relate to an antenna device that includes a cover having a specific shape to suppress a sidelobe of an elevation angle gain pattern which is caused by a radio-frequency (RF) device regardless of an avoidance area.Type: GrantFiled: October 31, 2022Date of Patent: November 28, 2023Assignee: AGENCY FOR DEFENSE DEVELOPMENTInventors: Seung Ho Kim, Byung Chul Park, Kun Sup Kwon, Jong Wan Heo, Sung Jae Lee, Ki Min Hwang
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Patent number: 10020575Abstract: An apparatus and method for controlling stabilization of a satellite-tracking antenna, the apparatus including: an antenna driving unit driving the antenna to track a satellite based on preset satellite position information and position information collected by an inertia sensor and an encoder; a point detecting unit detecting a point where an amplitude of a satellite reception signal is maximum; an elevation measuring unit measuring an elevation value corresponding to the point; and a controller controlling an azimuth motor and an elevation motor to enable the antenna to face the point, when the measured value is out of a first range, the controller controlling the azimuth motor to have an azimuth value corresponding to the point and controlling the elevation motor to have an elevation value less than the measured value corresponding to the point, when the measured value is in the first range.Type: GrantFiled: August 1, 2017Date of Patent: July 10, 2018Assignee: AGENCY FOR DEFENSE DEVELOPMENTInventors: Hyun-Wook Jo, Jong-Wan Heo, Myung-Jin Jang, Kun-Sup Kwon
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Publication number: 20180048062Abstract: An apparatus and method for controlling stabilization of a satellite-tracking antenna, the apparatus including: an antenna driving unit driving the antenna to track a satellite based on preset satellite position information and position information collected by an inertia sensor and an encoder; a point detecting unit detecting a point where an amplitude of a satellite reception signal is maximum; an elevation measuring unit measuring an elevation value corresponding to the point; and a controller controlling an azimuth motor and an elevation motor to enable the antenna to face the point, when the measured value is out of a first range, the controller controlling the azimuth motor to have an azimuth value corresponding to the point and controlling the elevation motor to have an elevation value less than the measured value corresponding to the point, when the measured value is in the first range.Type: ApplicationFiled: August 1, 2017Publication date: February 15, 2018Inventors: Hyun-Wook JO, Jong-Wan HEO, Myung-Jin JANG, Kun-Sup KWON
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Patent number: 9768508Abstract: An antenna system for triple-band satellite communication according to one exemplary embodiment of the present disclosure includes a feed horn device that is configured to simultaneously radiate or absorb wireless signals of triple bands including X, Ku and Ka bands, and a waveguide section that is coupled to the feed horn device and configured to transmit input and output of the wireless signals, wherein the feed horn device includes a corrugation horn that is configured to radiate or absorb the wireless signals of the X and Ku bands, the corrugation horn having a bell-like shape with a plurality of corrugations formed on an inner circumferential surface thereof in a stepped manner, and a dielectric feed horn that is configured to radiate or absorb the wireless signal corresponding to the Ku band and disposed in a central region of the corrugation horn.Type: GrantFiled: March 26, 2014Date of Patent: September 19, 2017Assignee: AGENCY FOR DEFENSE DEVELOPMENTInventors: Ki Min Hwang, Jong Wan Heo, Kun Sup Kwon
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Patent number: 9502763Abstract: A stabilization control method for a satellite tracking antenna disclosed herein includes outputting a monopulse signal and a gyro signal through a satellite tracking antenna having a gyro mounted thereto, under a situation that disturbance is applied to the satellite tracking antenna, inputting the output monopulse signal and gyro signal into a Kalman filter for stabilization of the satellite tracking antenna, defining a state vector of the Kalman filter based on a pointing-error angle for the satellite tracking, corresponding to the monopulse signal, and a pointing-error angular velocity for the satellite tracking, corresponding to the gyro signal, predicting an original monopulse signal corresponding to a state prior to distortion of the monopulse signal based on the defined state vector, and continuously updating the prediction of the original monopulse signal, and carrying out the stabilization control for the satellite tracking antenna by using the predicted original monopulse signal as a pointing-errorType: GrantFiled: April 21, 2014Date of Patent: November 22, 2016Assignee: AGENCY FOR DEFENSE DEVELOPMENTInventors: Si Hun Jo, Ho Jung Lee, Byoung Uk Nam, Jong Wan Heo
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Publication number: 20150116152Abstract: A stabilization control method for a satellite tracking antenna disclosed herein includes outputting a monopulse signal and a gyro signal through a satellite tracking antenna having a gyro mounted thereto, under a situation that disturbance is applied to the satellite tracking antenna, inputting the output monopulse signal and gyro signal into a Kalman filter for stabilization of the satellite tracking antenna, defining a state vector of the Kalman filter based on a pointing-error angle for the satellite tracking, corresponding to the monopulse signal, and a pointing-error angular velocity for the satellite tracking, corresponding to the gyro signal, predicting an original monopulse signal corresponding to a state prior to distortion of the monopulse signal based on the defined state vector, and continuously updating the prediction of the original monopulse signal, and carrying out the stabilization control for the satellite tracking antenna by using the predicted original monopulse signal as a pointing-errorType: ApplicationFiled: April 21, 2014Publication date: April 30, 2015Inventors: Si Hun JO, Ho Jung LEE, Byoung Uk NAM, Jong Wan HEO
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Publication number: 20150097747Abstract: An antenna system for triple-band satellite communication according to one exemplary embodiment of the present disclosure includes a feed horn device that is configured to simultaneously radiate or absorb wireless signals of triple bands including X, Ku and Ka bands, and a waveguide section that is coupled to the feed horn device and configured to transmit input and output of the wireless signals, wherein the feed horn device includes a corrugation horn that is configured to radiate or absorb the wireless signals of the X and Ku bands, the corrugation horn having a bell-like shape with a plurality of corrugations formed on an inner circumferential surface thereof in a stepped manner, and a dielectric feed horn that is configured to radiate or absorb the wireless signal corresponding to the Ku band and disposed in a central region of the corrugation horn.Type: ApplicationFiled: March 26, 2014Publication date: April 9, 2015Inventors: Ki Min HWANG, Jong Wan HEO, Kun Sup KWON
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Patent number: 8965686Abstract: Disclosed are an apparatus and method for computing a vehicle path by considering satellite communication channel states. The method includes: searching for a plurality of candidate paths, each path connected from a starting point to a destination; analyzing a satellite communication channel state with respect to each of the candidate paths, based on a receiving sensitivity of an electric wave received from a satellite; setting one of the candidate paths as a first path, based on the analyzed satellite communication channel states; and mapping the first path onto a map, and displaying the first path on a display unit.Type: GrantFiled: November 12, 2013Date of Patent: February 24, 2015Assignee: Agency for Defense DevelopmentInventors: Ki Min Hwang, Jong Wan Heo, Kun Sup Kwon, Chang Hyun Yoo
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Publication number: 20140336923Abstract: Disclosed are an apparatus and method for computing a vehicle path by considering satellite communication channel states. The method includes: searching for a plurality of candidate paths, each path connected from a starting point to a destination; analyzing a satellite communication channel state with respect to each of the candidate paths, based on a receiving sensitivity of an electric wave received from a satellite; setting one of the candidate paths as a first path, based on the analyzed satellite communication channel states; and mapping the first path onto a map, and displaying the first path on a display unit.Type: ApplicationFiled: November 12, 2013Publication date: November 13, 2014Applicant: AGENCY FOR DEFENSE DEVELOPMENTInventors: Ki Min HWANG, Jong Wan HEO, Kun Sup KWON, Chang Hyun YOO