The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2014
Filed:
Sep. 11, 2012
Hongyeol Lee, Chungcheongbuk-do, KR;
Man Seok Uhm, Daejeon, KR;
So-hyeun Yun, Daejeon, KR;
Changsoo Kwak, Daejeon, KR;
Jang-sup Choi, Daejeon, KR;
IN Bok Yom, Daejeon, KR;
Hongyeol Lee, Chungcheongbuk-do, KR;
Man Seok Uhm, Daejeon, KR;
So-hyeun Yun, Daejeon, KR;
ChangSoo Kwak, Daejeon, KR;
Jang-sup Choi, Daejeon, KR;
In Bok Yom, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
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.