| 摘要 |
PURPOSE: A balune is provided to be configured with a transmission line and a resonance circuit, thereby improving matching impedance property and signal passage property. CONSTITUTION: A balune circuit(200) comprises a first balanced terminal(202), a second balanced terminal(203), and an unbalanced terminal(201). A filter unit(250) is connected to the first balanced terminal, the second balanced terminal, and the unbalanced terminal. The filter unit comprises a low-pass filter and a high-pass filter. A first transmission line(210) is connected between the filter unit and the first balanced terminal. A first inductor(220) is serially connected between the first transmission line and the unbalanced terminal. A first capacitor(230) is serially connected between the unbalanced terminal and the second balanced terminal. In a second inductor(241), one end is connected between the first capacitor and the unbalanced terminal. |
