| 摘要 |
<p>Provided is a tunable acoustic wave device that utilizes the response of acoustic waves and is capable of enabling simple frequency adjustment and improved design freedom. This tunable acoustic wave device (1) is equipped with: a ferroelectric body (4); and IDT electrodes (3) which are provided in contact with the ferroelectric body (4) and used for exciting an acoustic wave. The tunable acoustic wave device is further equipped with first and second DC voltage application electrodes (5) which are provided in contact with the ferroelectric body (4) in order to apply a DC voltage to the ferroelectric body (4), and change the sound velocity of the acoustic wave by applying DC voltage.</p> |
