Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2005-12-06
2005-12-06
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S189000, C333S191000, C333S0990MP
Reexamination Certificate
active
06972641
ABSTRACT:
A FBAR ladder filter which may yield less degradation in the stopband near the passband edges than conventionally grounded FBAR ladder filters. For that purpose a thin film resonator (FBAR) ladder filter having a plurality of serially-coupled FBAR elements, each serially-coupled FBAR element including an upper metal electrode and a lower metal electrode, and a plurality of shunt-coupled FBAR elements, each shunt-coupled FBAR element including an upper metal ground electrode providing a ground node and a lower metal electrode, is provided with at least one capacitor element including an upper metal electrode and a lower metal electrode, wherein each capacitor element is serially coupled between two ground nodes so that the inductive coupling of the shunt-coupled FBAR elements is compensated.
REFERENCES:
patent: 6262637 (2001-07-01), Bradley et al.
patent: 6291931 (2001-09-01), Lakin
patent: 6323744 (2001-11-01), Barber et al.
patent: 6472954 (2002-10-01), Ruby et al.
patent: 6653913 (2003-11-01), Klee et al.
patent: 2001/0048352 (2001-12-01), Klee et al.
patent: 2002/0021192 (2002-02-01), Klee et al.
patent: 2003/0000058 (2003-01-01), Tsai et al.
patent: 2004/0085161 (2004-05-01), Kushitani et al.
patent: 2004/0124952 (2004-07-01), Tikka
patent: 101 27 655 (2003-01-01), None
Baker & Botts L.L.P.
Infineon - Technologies AG
Summons Barbara
LandOfFree
FBAR ladder filter and method of grounding of FBAR ladder... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with FBAR ladder filter and method of grounding of FBAR ladder..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and FBAR ladder filter and method of grounding of FBAR ladder... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3501941