Electronics and Telecommunications Research Institute

Doowon Climate Control Co., Ltd.

Hongyeol Lee

In Bok Yom

Changsoo Kwak

So-hyeun Yun

Man Seok Uhm

Youngrae Kim

Jang-sup Choi

Kichun Sung

Hyosang Kwak

Disclosed is a multimode microwave filter including a resonator in which a cavity is formed to generate a resonant mode and a plurality of irises formed on a side surface of the resonator, in which the cavity of the resonator has a rhombus-shaped cross section.

Multimode microwave filter

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.

Butler matrix

Growing community of inventors

Sejong-si, South Korea

Hongyeol Lee