| 摘要 |
Provided is a directional coupler which minimizes the loss of signals corresponding to the frequency. The directional coupler comprises a signal detection line and a signal line which are disposed adjacent to each other. The signal detection line comprises a first region, a second region, and a third region which are arranged in order. The first region and the third region may be separated from the signal line by a first distance. The second region may be separated from the signal line by a second distance which is different from the first distance. |
