Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2005-03-29
2005-03-29
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S195000, C310S31300R
Reexamination Certificate
active
06873227
ABSTRACT:
A longitudinally coupled resonator type surface acoustic wave filter includes a small pitch electrode finger portion having electrode fingers of which the pitch is smaller than that of the other electrode fingers. The small pitch electrode finger portion is provided in the end of at least one of interdigital transducers which is adjacent to the other interdigital transducer. Moreover, the small pitch electrode finger portion includes two adjacent electrode fingers in at least one position thereof which are electrode-inverted so that the polarities of the two adjacent electrode fingers are made the same.
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Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Summons Barbara
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