| 摘要 |
PURPOSE: A microstrip bandpass filter and a device thereof are provided to implement a bandpass filter which has a desired bandwidth by adjusting the strength of a coupling by controlling the length or width of a microstrip line. CONSTITUTION: A first capacitor(C1) and a second capacitor(C2) are serially connected between an input terminal and a ground terminal. A third capacitor(C3) and a fourth capacitor(C4) are serially connected between an output terminal and the ground terminal. A first microstrip line(ML1) and a second microstrip line(ML2) are serially connected between the contact point of the first and the second capacitor, and the contact point of the third and the fourth capacitor. The third microstrip line(ML3) is formed between the contact point of the first and the second microstrip line, and the ground terminal. A via hole is formed between the third microstrip line and the ground terminal. |
