DIRECTIONAL COUPLER

摘要

First and second microstriplines 2 and 3 disposed substantially in parallel to each other and coupled with each other are formed spirally in a substantially quadrangular shape with the first microstripline 2 being disposed inside. The space between the first and second microstriplines 2 and 3 at portions disposed adjacently with the same number of turns is set longer than the space between the first and second microstriplines 2 and 3 at portions disposed adjacently with different numbers of turns.