| 摘要 |
PURPOSE: A directional coupler is provided to obtain high combination and directionality by including a main line which propagates a high frequency signal and a sub line which is electromagnetically combined with the sub line. CONSTITUTION: A main line(1) is connected between a first input terminal(IN1) and a first output terminal(OUT1) and propagates the high frequency. A sub line(2) is connected between a second input terminal(IN2) and a second output terminal(OUT2). The sub line is electromagnetically combined with the main line. A first capacitor(C1) is connected in parallel to the main line or sub line. An LC resonant circuit resonates in a high frequency signal which is transmitted from the first input terminal to the second output terminal. |
