Surface acoustic wave device and communication apparatus

Details Surface acoustic wave device and communication apparatus Surface acoustic wave device and communication apparatus

2006-05-23

2006-05-23

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S194000, C333S195000

Reexamination Certificate

active

07049908

ABSTRACT:
A surface acoustic wave device includes one-terminal-pair SAW series resonators and one-terminal-pair SAW parallel resonators arranged in a ladder configuration. Among the series resonators, the resonant frequencies of, for example, two series resonators forming the pass band are lower than the anti-resonant frequency of the parallel resonators forming the pass band. A capacitive area of one of the series resonator is disposed in an inductive area formed by the parallel resonators forming the pass band and the other series resonators forming the pass band.

REFERENCES:
patent: 4841264 (1989-06-01), Oshikawa
patent: 5471178 (1995-11-01), Hickernell
patent: 5831493 (1998-11-01), Ushiroku
patent: 5963113 (1999-10-01), Ou et al.
patent: 6025763 (2000-02-01), Morimoto
patent: 6137380 (2000-10-01), Ushiroku et al.
patent: 6292071 (2001-09-01), Taniguchi
patent: 6518861 (2003-02-01), Taniguchi
patent: 6522219 (2003-02-01), Takamiya et al.
patent: 2003/0227358 (2003-12-01), Inose
patent: 0 541 284 (1993-05-01), None
patent: 0 746 095 (1996-12-01), None
patent: 0 795 958 (1997-09-01), None
patent: 05-183380 (1993-07-01), None
patent: 6-61783 (1994-03-01), None
patent: 08-037438 (1996-02-01), None
patent: 10-013187 (1998-01-01), None
patent: 11-163664 (1999-06-01), None
patent: 11-312951 (1999-11-01), None
patent: 2002-232264 (2002-08-01), None
patent: 2003-087096 (2003-03-01), None
Hikita, M. et al., “Design Methodology and Synthesis Techniques for Ladder-Type Saw Resonator Coupled Filters,” Ultrasonics Symposium, Oct. 1993, pp. 15-24, IEEE Inc., New York, NY, USA.
Plessky, V.P., “Saw Impedence Elements,” IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Sep. 1995, pp. 870-875, vol. 42, No. 5, IEEE Inc., New York, NY, USA.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3569422