Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Reexamination Certificate
2005-08-02
2005-08-02
Tan, Vibol (Department: 2819)
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
C333S193000, C333S185000
Reexamination Certificate
active
06924716
ABSTRACT:
An apparatus for improving the stop band response of a surface acoustic wave device (200) comprising a surface acoustic wave device (200) having internal electromagnetic coupling (106) and external electromagnetic coupling (108) and acoustic coupling (104); and a cancellation network (250, 251) coupled to the surface acoustic wave device to reduce the internal electromagnetic coupling (106) and external electromagnetic feed through (108); wherein the cancellation network (250, 251) reduces the amount of electromagnetic feed through at the output (102) of the surface acoustic wave device (200).
REFERENCES:
patent: 5093638 (1992-03-01), Kinsman et al.
patent: 5162822 (1992-11-01), Wakamori
patent: 5646584 (1997-07-01), Kondratyev et al.
patent: 5933062 (1999-08-01), Kommrusch
patent: 6377137 (2002-04-01), Ruby
patent: 6426683 (2002-07-01), Gu et al.
patent: 2003/0214371 (2003-11-01), Yip
Colin K. Campbell, Ph.D., D.Sc. “Understanding Surface Acoustic Wave (SAW) Devices for Mobile and Wireless Applications and Design Techniques”, Aug. 2003.
Motorola Inc.
Parmelee Steven C.
Tan Vibol
LandOfFree
Method and apparatus for reduction of electromagnetic feed... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reduction of electromagnetic feed..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reduction of electromagnetic feed... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3507471