Duplexer having two surface acoustic wave filters on one...

Details Duplexer having two surface acoustic wave filters on one... Duplexer having two surface acoustic wave filters on one...

2006-04-18

2006-04-18

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S193000

Reexamination Certificate

active

07030716

ABSTRACT:
A duplexer includes two surface acoustic wave filters that are formed on one substrate, at least one of the two surface acoustic wave filters being a ladder filter. In this duplexer, the positional difference between the centers in the surface acoustic wave propagating direction of each two neighboring comb-like electrodes among comb-like electrodes that form series-arm resonators in the ladder filter is equal to or smaller than a fourth of the length in the propagating direction of the comb-like electrode having the larger number of pairs of electrode fingers of each two neighboring comb-like electrodes.

REFERENCES:
patent: 5864260 (1999-01-01), Lee
patent: 6369672 (2002-04-01), Ikada
patent: 6380823 (2002-04-01), Ikata et al.
patent: 6469593 (2002-10-01), Nishizawa et al.
patent: 6566981 (2003-05-01), Urabe et al.
patent: 6765456 (2004-07-01), Ehara et al.
patent: 7-263997 (1995-10-01), None
patent: 9-199986 (1997-07-01), None
patent: 2002-237739 (2002-08-01), None
patent: 2003-51731 (2003-02-01), None

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