Surface acoustic wave device and communication device

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

2006-01-24

2006-01-24

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S193000, C333S195000, C310S31300R

Reexamination Certificate

active

06989724

ABSTRACT:
A surface acoustic wave apparatus include at least two surface acoustic wave filter devices, each of which includes two or more IDTs. One of the at least two surface acoustic wave filter devices is connected to one of balanced signal terminals, and another of the at least two surface acoustic wave filter devices is connected to the other balanced signal terminal, so as to have a balance-unbalance conversion function. The at least two surface acoustic wave devices are configured to produce a difference in the intensity of the excited SSBW therebetween.

REFERENCES:
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patent: 6731188 (2004-05-01), Sawada et al.
patent: 6771144 (2004-08-01), Takamine
patent: 6828878 (2004-12-01), Takamine et al.
patent: 10-117123 (1998-05-01), None
patent: 11-191720 (1999-07-01), None
patent: 2001-308672 (2001-11-01), None
patent: 2002-314366 (2002-10-01), None

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