| 摘要 |
<p>A multiband matching circuit (100) includes a first matching unit (110), a second matching unit (120), and a third matching unit (130), with all units being connected in series in a signal path. Matching with target impedance (Z 0 ) is established at a first frequency by appropriately designing the first matching unit and at a second frequency by appropriately designing the second and third matching units. The second matching unit and the third matching unit are designed to make the conversion ratio of the impedance viewed from the connection point (B) between the second matching unit and the third matching unit to a circuit element (20) to the target impedance smaller than the conversion ratio of the impedance viewed from the connection point (A) between the first matching unit and the second matching unit to the circuit element (20) to the target impedance, at the second frequency.</p> |
