| 摘要 |
<p>A surface acoustic wave device has a structure in which a surface acoustic wave element ( 11 ), provided with two kinds of surface acoustic wave filter structures having different center frequencies on the same piezoelectric substrate ( 12 ), is disposed on a package ( 16 ). The surface acoustic wave element ( 11 ) comprises a first filter structure ( 13 ) having a first center frequency, a second filter structure ( 14 ) having a second center frequency and a shield electrode ( 15 ) between the first filter structure ( 13 ) and the second filter structure ( 14 ). The shield electrode ( 15 ) is connected to an earth terminal ( 181 ) of the package ( 16 ) to be grounded. According to the structure, electromagnetic shielding between the first filter structure ( 13 ) and the second filter structure ( 14 ) can be performed, therefore, the isolation property therebetween can be improved and the surface acoustic wave device can be miniaturized.</p> |
