| 摘要 |
PURPOSE: A bandpass filter and a communications device thereof are provided to reduce the size of a bandpass filter and to be easily implemented by simplifying a structure. CONSTITUTION: At least one stub is arranged on a substrate and is electrically connected to a feeding wire. A bandpass filer includes a ground plate formed in one side of the substrate. At least one short-circuit stub is formed on the substrate. The short-circuit stub is electrically connected to the ground plate through a corresponding via hole(310). |
