Multi-mode surface acoustic wave filter device and duplexer

Details Multi-mode surface acoustic wave filter device and duplexer Multi-mode surface acoustic wave filter device and duplexer

2006-07-18

2006-07-18

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S133000

Reexamination Certificate

active

07078989

ABSTRACT:
A multi-mode surface acoustic wave filter device includes: a piezoelectric substrate; at least one input IDT (interdigital transducer) and at least one output IDT that are formed on the piezoelectric substrate; reflectors that are formed on the piezoelectric substrate and arranged on the external sides of the input IDT and the output IDT; an input terminal that supplies input signals to the input IDT; and an output terminal that receives output signals from the output IDT. In this multi-mode surface acoustic wave filter, the input terminal and the output terminal extend in the same direction.

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