Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2007-01-30
2007-01-30
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C310S31300R
Reexamination Certificate
active
10823648
ABSTRACT:
Efficient transverse energy confinement, and provision of a surface acoustic wave filter having preferable characteristics of both insertion loss and shape factor are obtained. In the surface acoustic wave filter, electrode fingers of one comb electrode are laid in a state of being inserted to the electrode fingers of the other comb electrode, and a thick film thicker than each plurality of electrode fingers is produced in a partial area of the bus bar, and a tip gap is provided between the top of each plurality of electrode fingers and the end face of the opposed bus bar, with a distance therebetween set not greater than 0.2λ (where, λ is one period of the comb electrode).
REFERENCES:
patent: 5682126 (1997-10-01), Plesski et al.
patent: 5710529 (1998-01-01), Sugiyama et al.
patent: 6121860 (2000-09-01), Tsutsumi et al.
patent: 6172580 (2001-01-01), Taniguchi et al.
patent: 6377138 (2002-04-01), Takagi et al.
patent: 6404101 (2002-06-01), Taniguchi et al.
patent: 6714102 (2004-03-01), Ruby et al.
patent: 6731046 (2004-05-01), Watanabe et al.
patent: 6903626 (2005-06-01), Tsutsumi et al.
patent: 6989724 (2006-01-01), Watanabe et al.
patent: 2002/0057036 (2002-05-01), Taniguchi et al.
patent: 2002/0153970 (2002-10-01), Noto
patent: 2003/0117039 (2003-06-01), Tsutsumi et al.
patent: 2003/0117240 (2003-06-01), Inoue et al.
patent: 2003/0155993 (2003-08-01), Takamine et al.
patent: 1 037 384 (2000-09-01), None
patent: 1 037 384 (2000-09-01), None
patent: 11-191720 (1999-07-01), None
patent: 2002-100952 (2002-04-01), None
patent: 2002-176333 (2002-06-01), None
patent: 2002-314366 (2002-10-01), None
patent: 2002-314368 (2002-10-01), None
Inoue Shogo
Kawachi Osamu
Matsuda Takashi
Satoh Yoshio
Tsutsumi Jun
Fujitsu Limited
Fujitsu Media Devices Limited
Summons Barbara
LandOfFree
Surface acoustic wave device with a thicker partial bus bar... 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 device with a thicker partial bus bar..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface acoustic wave device with a thicker partial bus bar... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3767651