Electronics and Telecommunications Research Institute

Jang-sup Choi

In Bok Yom

Changsoo Kwak

Man Seok Uhm

So-hyeun Yun

Hongyeol Lee

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.

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Daejeon, South Korea

Jang-sup Choi