DIRECTIONAL COUPLER DEVICE WITH HIGH ISOLATION CHARACTERISTICS

摘要

The embodiment of the present invention relates to a directional coupler with a high isolation property. Provided is the directional coupler which includes a first directional coupler which includes a first main line and a first sub line and a second directional coupler which includes a second main line and a second sub line. The first directional coupler and the second directional coupler are serially connected.