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公开(公告)号：US12244051B2
公开(公告)日：2025-03-04
申请号：US17877165
申请日：2022-07-29
Applicant: Korea Electronics Technology Institute
Inventor： Ki Jin Kim , Kwang Ho Ahn , Soo Chang Chae
Abstract: There is provided an ultra-small size broadband coupler. A Lange coupler according to an embodiment includes: first lines which are formed in a spiral shape, and have a first port and a second port formed at one end thereof and have connection ends formed at the other end thereof; and second lines which are formed in a spiral shape, and have connection ends formed at one end thereof to be connected to the connection ends of the first lines, and have a third port and a fourth port formed at the other end thereof. Accordingly, the Lange coupler maintains broadband characteristics while minimizing its area, so that it is possible to design a small component for mobile communication and to noticeably reduce an insertion loss.
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公开(公告)号：US12088018B2
公开(公告)日：2024-09-10
申请号：US17623093
申请日：2020-12-22
Applicant: Korea Electronics Technology Institute
Inventor： Ki Jin Kim , Kwang Ho Ahn , Soo Chang Chae
CPC classification number: H01Q3/26 , H01Q9/0407 , H04B7/0617
Abstract: Provided is a 5G dual port beamforming antenna. The beamforming antenna according to an embodiment of the present disclosure includes a plurality of patch antennas, and the patch antenna includes: a first patch positioned on an upper portion; a second patch positioned on a left side under the first patch and having a plurality of feeding ports formed thereon; a third patch positioned on an upper portion of a right side of the second patch; and a fourth patch positioned on a lower portion of the right side of the second patch. Accordingly, 3D wide angle beamforming is possible in an antenna to be used in 5G mobile communication systems, military radar systems, etc.
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公开(公告)号：US12040788B2
公开(公告)日：2024-07-16
申请号：US17623040
申请日：2019-12-12
Applicant: Korea Electronics Technology Institute
Inventor： Ki Jin Kim , Kwang Ho Ahn , Soo Chang Chae
IPC: H03K17/693 , H03K17/687
CPC classification number: H03K17/693 , H03K17/6871
Abstract: Provided is a switch having a structure having an excellent isolation characteristic even without a limiter in an ultrahigh frequency hand used for a military component. A switch according to an embodiment of the present invention comprises: multiple transistors which are connected in parallel to a path from an input terminal toward an output terminal and perform switching; and a first transmission line provided between the input terminal and a node on a path to which a first transistor is connected. By the present invention, switching can be performed in an ultrahigh frequency such as W-band while a GaN transistor is used, an insertion loss is low, an isolation characteristic is excellent, and eventually efficiency of an ultrahigh frequency circuit can be further enhanced.
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