Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2006-03-21
2006-03-21
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C333S133000, C310S31300R
Reexamination Certificate
active
07015776
ABSTRACT:
A SAW filter includes at least two IDTs arranged along a SAW propagation direction on a piezoelectric substrate and first and second reflectors sandwiching the IDTs. A group of electrode fingers of each of the first and second reflectors is interdigital-width weighted. Further, a method of interdigital-width weighting of the electrode fingers of the first reflector is different from that of interdigital-width weighting of the electrode fingers of the second reflector.
REFERENCES:
patent: 4281301 (1981-07-01), Stevens et al.
patent: 5621364 (1997-04-01), Ruile et al.
patent: 6420946 (2002-07-01), Bauer et al.
patent: 6650207 (2003-11-01), Tanaka
patent: 2004/0077325 (2004-04-01), Takamine
patent: 42 13 117 (1993-10-01), None
patent: 3-128519 (1991-05-01), None
patent: 3-278606 (1991-12-01), None
patent: 10-261935 (1998-09-01), None
patent: 2000-196399 (2000-07-01), None
patent: 2003-174350 (2003-06-01), None
patent: 2002-0079538 (2002-10-01), None
Official Communication issued in the corresponding Korean Application No. 10-2004-0004285 dated Nov. 14, 2005.
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Summons Barbara
LandOfFree
Saw filter and communication device utilizing a weighted... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Saw filter and communication device utilizing a weighted..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Saw filter and communication device utilizing a weighted... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3581069