Surface acoustic wave duplexer and communication apparatus...

Details Surface acoustic wave duplexer and communication apparatus... Surface acoustic wave duplexer and communication apparatus...

2005-09-13

2005-09-13

Callahan, Timothy P. (Department: 2816)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S195000, C333S198000

Reexamination Certificate

active

06943645

ABSTRACT:
A surface acoustic wave duplexer includes a first filter including a ladder filter and a second filter including a ladder filter with a pass band that is different from that of the first filter. Inductors are connected in parallel with respective series resonators of both first and second filters.

REFERENCES:
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patent: 6222426 (2001-04-01), Komazaki et al.
patent: 6731185 (2004-05-01), Taniguchi
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patent: 10-065490 (1998-03-01), None
patent: 10-313229 (1998-11-01), None

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