Surface acoustic wave resonator and ladder-type filter

Details Surface acoustic wave resonator and ladder-type filter Surface acoustic wave resonator and ladder-type filter

2011-03-29

2011-03-29

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S196000, C310S31300R, C310S31300R

Reexamination Certificate

active

07915976

ABSTRACT:
A surface acoustic wave resonator is constructed such that cross widths of an IDT electrode are weighted so that the cross widths are reduced as they move outward in the surface acoustic wave propagation direction, an inner edge of a first bus bar includes inclined portions that are inclined so that the inner edge is spaced a predetermined distance away from an envelope portion adjacent to the first bus bar, an inner edge of a second bus bar includes inclined portions that are inclined so that the inner edge is spaced a predetermined distance away from an envelope portion adjacent to the second bus bar, and the sum N of the numbers of electrode fingers and dummy electrodes that are crossed by a straight line extending from the tip of at least one of the electrode fingers in the surface acoustic wave propagation direction is at least N.

REFERENCES:
patent: 4205285 (1980-05-01), Dempsey et al.
patent: 4472694 (1984-09-01), Lee
patent: 6025763 (2000-02-01), Morimoto
patent: 6346761 (2002-02-01), Isobe et al.
patent: 2001/0011932 (2001-08-01), Takamiya et al.
patent: 2002/0044497 (2002-04-01), Kachi et al.
patent: 2005/0110367 (2005-05-01), Kondratiev
patent: 2010/0237963 (2010-09-01), Takamine
patent: 2000-286663 (2000-10-01), None
patent: 2001-298348 (2001-10-01), None
patent: 2002-084162 (2002-03-01), None
Official Communication issued in International Patent Application No. PCT/JP2008/063882, mailed on Oct. 7, 2008.

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