Surface acoustic wave device and communication device

摘要

A surface acoustic wave device includes interdigital electrodes for generating a surface acoustic wave and detecting the wave, which are provided on a piezoelectric substrate having piezoelectric properties. A signal line is arranged so as to be connected to the interdigital electrodes which are unbalanced-side electrodes. Balanced-signal terminals are arranged so as to be connected to the interdigital electrode which is a balanced-side electrode. A ground line is provided between a balanced-signal terminal and the adjacent signal line. A capacitance generated between the signal line and the balanced-signal terminal is minimized by the ground line. Thus, the balance degrees between the balanced-signal terminals are greatly improved.