| 摘要 |
In a surface acoustic wave device according to the present invention, a transmitting filter element TX and a receiving filter element RX are formed on one main surface of a piezoelectric substrate 300 , and are mounted by face down on an upper surface of a circuit board 200 . A ground electrode 322 in the receiving filter element RX is connected to three linear via conductors 221 ' formed on the circuit board 200 , and a ground electrode 312 in the transmitting filter element TX is connected to a crank-shaped via conductor 211 ' formed on the circuit board 200. |
