| 摘要 |
<p>This acoustic wave filter is provided with: a first signal wire (7) for connecting one of multiple first IDT electrodes (21) to a first balanced signal terminal (3); a second signal wire (9) for connecting, among the multiple first IDT electrodes (21), a first IDT electrode (21), which is positioned on the side closer to a second acoustic wave filter section (6) than the first IDT electrode (21) connected to the first balanced signal terminal (3), to a second balanced signal terminal (4); a third signal wire (8) for connecting one of multiple second IDT electrodes (22) to a second balanced signal terminal (4); and a fourth signal wire (10) for connecting, among the multiple second IDT electrodes (22), a second IDT electrode (22), which is positioned on the side closer to a first acoustic wave filter section (5) than the second IDT electrode (22) connected to the second balanced signal terminal (4), to the first balanced signal terminal (3). The fourth signal wire (10) has an intersection part where the fourth signal wire three-dimensionally intersects with a portion of the second signal wire (9). This intersection part extends over the main plane (30a) in a slanting direction with respect to the second signal wire (9). An acoustic wave filter that is less subject to deterioration of the insertion loss even when the input terminal or the output terminal is used in a shared manner can be provided.</p> |
