Patents Assigned to MOBITECH CORP.
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Patent number: 9209517Abstract: A MIMO/diversity antenna for improving isolation of a frequency band includes: a ground surface formed on a printed circuit board; planar inverted F antennas having the ground surface therebetween and disposed on the printed circuit board having no ground surface formed, each F antenna having an antenna pattern that includes a radiation unit, a power supply unit, and a ground unit; power supply pads and ground pads formed on the printed circuit board having no ground surface formed corresponding to the power supply unit and the ground unit of the antenna pattern in the planar inverted F antennas; and connection patterns connecting the ground surface with each ground pad to electrically connect the ground surface to each ground unit of the antenna pattern in the planar inverted F antennas. At least one of the connection patterns is formed with a strip line of a meandering shape.Type: GrantFiled: February 8, 2012Date of Patent: December 8, 2015Assignee: MOBITECH CORP.Inventors: Sang-Hoon Choi, Young-Sang Kim, Bu-Seok Shim
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Patent number: 9196957Abstract: A MIMO antenna for improving isolation is disclosed. The disclosed antenna includes a dielectric feature; a ground plane included in a first layer of the dielectric feature; a first radiator, which is electromagnetically joined with a first feed point, configured to radiate a first RF signal, and joined with the ground plane; a second radiator, which is electromagnetically joined with a second feed point, configured to radiate a second RF signal, and joined with the ground plane; and a connector line, which is joined with a particular point of the first radiator and with a particular point of the second radiator to connect the first radiator with the second radiator. The disclosed antenna can improve isolation properties between multiple antennas and can ensure adequate isolation properties even when the distances between multiple antennas are set to be relatively small.Type: GrantFiled: April 28, 2011Date of Patent: November 24, 2015Assignees: MOBITECH CORP, Seoul National University of Technology Center for Industry CollaborationInventors: Jin-Myung Kim, Chang-Won Jung, In-Su Yeom
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Patent number: 9136592Abstract: The ink for printing an antenna pattern for a mobile phone according to an embodiment of the present invention includes a mixture of one of silver (Ag) powder, nickel (Ni) powder, copper (Cu) powder, and gold (Au) powder, liquid acrylonitrile, liquid polystyrene, liquid butadiene, and methyl ethyl ketone (MEK) as a diluent. The present invention does not include a plating process, and thus allows a significant improvement in productivity.Type: GrantFiled: July 5, 2010Date of Patent: September 15, 2015Assignees: Yen An Technology Co., LTD, Mobitech CorpInventors: Kyung-Sook Lee, Se-Yong Park, Chul-An Lim, Byoung-Nam Kim
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Patent number: 8659482Abstract: A Multiple-Input and Multiple-Output (MIMO) antenna having a plurality of isolation adjustment portions is provided. The MIMO antenna includes a plurality of radiation elements and a plurality of isolation adjustment portions. The plurality of radiation elements is symmetrically formed on the surfaces of the left and right sides of a dielectric element having a predetermined shape, is spaced apart from each other by a predetermined distance, operates in multiple frequency bands, and includes feeding portions, respectively. The plurality of isolation adjustment portions is coupled to the plurality of radiation elements so that they have electromagnetic characteristics different from those of the plurality of radiation elements, thereby improving isolation in each of the frequency bands in which the plurality of radiation elements operate.Type: GrantFiled: November 18, 2011Date of Patent: February 25, 2014Assignee: Mobitech Corp.Inventors: Chan-Ho Kim, Jin-Myung Kim, Jae-Ho Lee, Heung-Ju Ahn
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Publication number: 20130307744Abstract: A MIMO/diversity antenna for improving isolation of a frequency band includes: a ground surface formed on a printed circuit board; planar inverted F antennas having the ground surface therebetween and disposed on the printed circuit board having no ground surface formed, each F antenna having an antenna pattern that includes a radiation unit, a power supply unit, and a ground unit; power supply pads and ground pads formed on the printed circuit board having no ground surface formed corresponding to the power supply unit and the ground unit of the antenna pattern in the planar inverted F antennas; and connection patterns connecting the ground surface with each ground pad to electrically connect the ground surface to each ground unit of the antenna pattern in the planar inverted F antennas. At least one of the connection patterns is formed with a strip line of a meandering shape.Type: ApplicationFiled: February 8, 2012Publication date: November 21, 2013Applicant: MOBITECH CORP.Inventors: Sang-Hoon Choi, Young-Sang Kim, Bu-Seok Shim
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Patent number: 8514134Abstract: A Multiple-Input Multiple-Output (MIMO) antenna having parasitic elements is provided. The MIMO antenna includes a plurality of antenna elements, a plurality of parasitic elements, and a bridge. The plurality of antenna elements is symmetrically disposed on one side surface of a board while maintaining a predetermined distance therebetween. The plurality of parasitic elements is disposed on the other side surface of the board in a one-to-one correspondence with the plurality of antenna elements. The bridge is formed of a metal pattern line, and is configured to connect the plurality of parasitic elements to each other.Type: GrantFiled: October 19, 2009Date of Patent: August 20, 2013Assignee: Mobitech Corp.Inventors: Chan Ho Kim, Jin Myung Kim, Chang-Gyu Choi, Gyoung Rok Beak, Young Hun Park, Heung Ju Ahn, Yeon Ho Yang
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Publication number: 20130135168Abstract: A MIMO antenna for improving isolation is disclosed. The disclosed antenna includes a dielectric feature; a ground plane included in a first layer of the dielectric feature; a first radiator, which is electromagnetically joined with a first feed point, configured to radiate a first RF signal, and joined with the ground plane; a second radiator, which is electromagnetically joined with a second feed point, configured to radiate a second RF signal, and joined with the ground plane; and a connector line, which is joined with a particular point of the first radiator and with a particular point of the second radiator to connect the first radiator with the second radiator. The disclosed antenna can improve isolation properties between multiple antennas and can ensure adequate isolation properties even when the distances between multiple antennas are set to be relatively small.Type: ApplicationFiled: April 28, 2011Publication date: May 30, 2013Applicants: SEOUL MATIONAL UNIVERSITY OF TECHNOLOGY CENTER FOR INDUSTRY COLLABORATION, MOBITECH CORPInventors: Jin-Myung Kim, Chang-Won Jung, In-Su Yeom
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Publication number: 20130076572Abstract: The ink for printing an antenna pattern for a mobile phone according to an embodiment of the present invention includes a mixture of one of silver (Ag) powder, nickel (Ni) powder, copper (Cu) powder, and gold (Au) powder, liquid acrylonitrile, liquid polystyrene, liquid butadiene, and methyl ethyl ketone (MEK) as a diluent. The present invention does not include a plating process, and thus allows a significant improvement in productivity.Type: ApplicationFiled: July 5, 2010Publication date: March 28, 2013Applicants: MOBITECH CORP, YEN AN TECHNOLOGY CO., LTDInventors: Kyung-Sook Lee, Se-Yong Park, Chul-An Lim, Byoung-Nam Kim
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Publication number: 20120127038Abstract: A Multiple-Input and Multiple-Output (MIMO) antenna having a plurality of isolation adjustment portions is provided. The MIMO antenna includes a plurality of radiation elements and a plurality of isolation adjustment portions. The plurality of radiation elements is symmetrically formed on the surfaces of the left and right sides of a dielectric element having a predetermined shape, is spaced apart from each other by a predetermined distance, operates in multiple frequency bands, and includes feeding portions, respectively. The plurality of isolation adjustment portions is coupled to the plurality of radiation elements so that they have electromagnetic characteristics different from those of the plurality of radiation elements, thereby improving isolation in each of the frequency bands in which the plurality of radiation elements operate.Type: ApplicationFiled: November 18, 2011Publication date: May 24, 2012Applicant: MOBITECH CORP.Inventors: Chan-Ho KIM, Jin-Myung KIM, Jae-Ho LEE, Heung-Ju AHN
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Publication number: 20110298666Abstract: A Multiple-Input Multiple-Output (MIMO) antenna having parasitic elements is provided. The MIMO antenna includes a plurality of antenna elements, a plurality of parasitic elements, and a bridge. The plurality of antenna elements is symmetrically disposed on one side surface of a board while maintaining a predetermined distance therebetween. The plurality of parasitic elements is disposed on the other side surface of the board in a one-to-one correspondence with the plurality of antenna elements. The bridge is formed of a metal pattern line, and is configured to connect the plurality of parasitic elements to each other.Type: ApplicationFiled: October 19, 2009Publication date: December 8, 2011Applicant: MOBITECH CORP.Inventors: Chan Ho Kim, Jin Myung Kim, Chang-Gyu Choi, Gyoung Rok Beak, Young Hun Park, Heung Ju Ahn, Yeon Ho Yang