| 摘要 |
PURPOSE: A directional coupler is provided to easily form coupling electrode to improve efficiency of processes, to allow easy print process, maximized coupling area to have enhanced characteristics as against parts of the same kind, and to allow a constant coupling area to be always formed, thereby improving reliability of product. CONSTITUTION: A cover sheet(100) includes a ground electrode(110) which is connected to only a ground terminal(500A) among a plurality of external terminals(500) formed outside a coupler(400). Formed is a connection sheet(300), in which connection electrodes(320) with a multiplicity of convex-concave members(310) are formed on an external circumference edge respectively, which is connected with the ground electrode(110) through a via hole(340) formed in its one terminal, and both terminals of the connection electrodes(320) are connected with a main output terminal(500D) and a connection terminal(500E), respectively. An operation sheet(200) includes one terminal to which the connection electrodes(320) and the via hole(340) is connected, formed on an external circumference edge so that an operation electrode(220) where a via hole(210) is formed its one terminal includes a multiplicity of convex-concave members(230), and is connected with an input terminal(500B) and a couple output terminal(500C), respectively.
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