| 摘要 |
A surface acoustic wave device in which: input external terminals, output external terminals and ground external terminals are disposed on the outer peripheral surfaces of a container; there are formed, in a cavity portion of the container, input pads, output pads and ground pads which are respectively electrically connected to the input external terminals, the output external terminals and the ground external terminals; a plurality of SAW filter elements are housed in the cavity portion of the container; a plurality of ground conductor films are respectively formed in the areas where the SAW filter elements are respectively housed; the input electrodes, output electrodes and ground electrodes of the SAW filter elements are respectively connected to the input pads, the output pads and the ground pads; and a metallic lid hermetically seals the cavity portion. Only one SAW filter element is connected to the same ground pad. All the ground conductor films on which the SAW filter elements are respectively mounted, are electrically separated from one another. According to the arrangement above-mentioned, there can be provided a surface acoustic wave device capable of effectively restraining the influence of parasitic capacitance among the SAW filter elements, thereby to assure stable characteristics.
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