| 摘要 |
A bandpass tunable filter which comprises resonant cavities magnetically connected to one another, resonant cavities are made of sections of transmission links and includes three sections, two of which are parallel, a third one interconnects closed ends of parallel sections with forming U-like resonant cavities, the other ends (open) of parallel sections of which are connected to one another with help of variable capacitors. Parallel sections of the transmission link are performed from section with different characteristic impedance. Characteristic impedance of the sections with open ends of parallel sections exceeds characteristic impedance of the sections with closed ends of parallel sections and characteristic impedance of the third sections. |
