| 摘要 |
The invention relates to a tunable HF filter circuit (AHF), which enables good electrical properties, good tunability, and simple control despite low complexity. The filter circuit comprises a first and a second signal route (SW1, SW2) in a signal path (E, A). At least three resonant circuits (RK1, RK2, RK3) are arranged one after the other in the second signal route and connect the second signal route to ground. The resonant circuits are electrically and/or magnetically coupled (K) and each comprise a tunable impedance element. The second signal route contains an impedance element (IMP). |
