| 摘要 |
PURPOSE: A band-pass filter for an intermediate frequency of a communications satellite is provided to obtain a desired bandwidth for an input frequency signal although an inductor and a capacitor are tuned with a fixed value in a band-pass filter used for intermediate frequency filtering of a communications satellite. CONSTITUTION: A first inductor (L1) and a first capacitor (C1), a second inductor (L2) and a second capacitor (C2), and a third inductor (L3) and the first capacitor (C3) are connected in serial. A fourth inductor (L4) and a fourth capacitor (C4) attached to a signal output section (OUT) are connected in parallel on contact points between the first inductor (L1) and the first capacitor (C1), and the second inductor (L2) and the second capacitor (C2). A fifth inductor (L5) and a fifth capacitor (C5) are connected in parallel on contact points between the second inductor (L2) and the second capacitor (C2), and the third inductor (L3) and the third capacitor (C3). |
