Surface acoustic wave device and communication apparatus

Details Surface acoustic wave device and communication apparatus Surface acoustic wave device and communication apparatus

2007-11-20

2007-11-20

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S193000

Reexamination Certificate

active

11139024

ABSTRACT:
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 substrate300, and are mounted by face down on an upper surface of a circuit board200. A ground electrode322in the receiving filter element RX is connected to three linear via conductors221′ formed on the circuit board200, and a ground electrode312in the transmitting filter element TX is connected to a crank-shaped via conductor211′ formed on the circuit board200.

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