Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2008-11-20
2009-11-17
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S193000
Reexamination Certificate
active
07619491
ABSTRACT:
An elastic wave duplexer includes a transmission filter chip and a reception filter chip each defined by an elastic wave filter chip and flip-chip bonded to a laminated board. A coil-shaped line including coil-shaped line patterns is provided inside the laminated board. The coil-shaped line defines an impedance matching circuit. In plan view, the transmission filter chip is disposed on one side of a center line passing through the approximate center of the laminated board and extending between a first edge and a second edge, and the reception filter chip is disposed on the other side of the center line. The coil-shaped line is disposed on the side on which the reception filter chip is disposed.
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Official Communication issued in International Patent Application No. PCT/JP2007/060189, mailed on Aug. 28, 2007.
Takata Toshiaki
Yokokura Osamu
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Summons Barbara
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