Surface acoustic wave device, duplexer, and communications...

Details Surface acoustic wave device, duplexer, and communications... Surface acoustic wave device, duplexer, and communications...

2006-02-24

2008-11-25

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S193000

Reexamination Certificate

active

07456705

ABSTRACT:
A SAW device D1according to the present invention comprises a ladder-type SAW device T1for transmission and a ladder-type SAW device R2for receiving on a main surface of a piezoelectric substrate. The ratio (LT/PT) of the width LT of electrode fingers to the pitch PT between the electrode fingers in a SAW resonator S1in the ladder-type SAW device T1for transmission is made lower than the ratio (LR/PR) of the width LR of electrode fingers to the pitch PR between the electrode fingers in a SAW resonator S2in the ladder-type SAW device R2for receiving. As a result, the SAW device D1has a low loss within a band and has steep attenuation characteristics outside the band, and is miniaturized.

REFERENCES:
patent: 5654680 (1997-08-01), Kwan et al.
patent: 6351197 (2002-02-01), Selmeier et al.
patent: 6404101 (2002-06-01), Taniguchi et al.
patent: 6570470 (2003-05-01), Maehara et al.
patent: 6717487 (2004-04-01), Takata
patent: 6833774 (2004-12-01), Abbott et al.
patent: 6946931 (2005-09-01), Inoue et al.
patent: 2004/0227587 (2004-11-01), Inoue et al.
patent: 09-093072 (1997-04-01), None
patent: 10-313229 (1998-11-01), None
patent: 2001-308671 (2001-11-01), None
patent: 2003-198317 (2003-07-01), None
Patent Abstracts of Japan JP 02-295305, Dec. 6, 1990, Morimoto.

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