Patent ID: 9287850
Filing Date: 2016-03-15
CPC Classification: H03H,H04B

Claim Text:
1. A communication module comprising a plurality of duplexers for different transmit-receive bands, each duplexer having a first filter and a second filter, the first filter of each duplexer being one of a transmit filter and a receive filter, and the second filter of each duplexer being another of the transmit filter and the receive filter, wherein IDT electrodes of the first filters of at least two of the plurality of duplexers having different transmit-receive bands are composed of a same material, have a same thickness, and are provided on a same single piezoelectric substrate, wherein IDT electrodes of the second filters of said at least two of the plurality of duplexers are provided on one or more of piezoelectric substrates that are different from said single piezoelectric substrate on which the IDT electrodes of the first filters are provided, and wherein the IDT electrodes of the first filters of said at least two of the plurality of duplexers and the IDT electrodes of the second filters of said at least two of the plurality of duplexers are composed of different materials and have different thickness.