Surface acoustic wave apparatus and communication apparatus...

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

2005-04-12

2005-04-12

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C333S195000

Reexamination Certificate

active

06879086

ABSTRACT:
A surface acoustic wave apparatus includes at least one longitudinally-coupled-resonator surface acoustic wave filter having at least three IDTs arranged on a piezoelectric substrate along the propagation direction of surface acoustic waves and at least one surface acoustic wave resonator that is connected in series to at least two of the IDTs of the longitudinally-coupled-resonator surface acoustic wave filter. The parasitic capacitance between the longitudinally-coupled-resonator surface acoustic wave filter and the surface acoustic wave resonator is about 6.5×102/f0[pF] or less, where f0represents the center frequency (MHz) within the pass band of the longitudinally-coupled-resonator surface acoustic wave filter.

REFERENCES:
patent: 6670868 (2003-12-01), Kawase et al.
patent: 6744333 (2004-06-01), Sawada
patent: 6771144 (2004-08-01), Takamine
patent: 6781478 (2004-08-01), Takamine et al.
patent: 6815868 (2004-11-01), Shibata et al.
patent: 6816036 (2004-11-01), Takamine
patent: 07-030367 (1995-01-01), None

Affiliated with

Also associated with

Rating

Surface acoustic wave apparatus and communication apparatus... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Surface acoustic wave apparatus and communication apparatus..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface acoustic wave apparatus and communication apparatus... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3389598