发明授权
US06670866B2 Bulk acoustic wave resonator with two piezoelectric layers as balun in filters and duplexers
有权
具有两个压电层的体声波谐振器，作为滤波器和双工器中的平衡 - 不平衡变换器
- 专利标题： Bulk acoustic wave resonator with two piezoelectric layers as balun in filters and duplexers
- 专利标题（中）： 具有两个压电层的体声波谐振器，作为滤波器和双工器中的平衡 - 不平衡变换器
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申请号： US10045645申请日： 2002-01-09
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公开(公告)号： US06670866B2公开(公告)日： 2003-12-30
- 发明人: Juha Ellä , Robert Aigner
- 申请人： Juha Ellä , Robert Aigner
- 主分类号： H03H954
- IPC分类号： H03H954
摘要：
A bulk acoustic wave device having two resonators in a stacked-up configuration separated by a dielectric layer. The device can be coupled to a lattice filter or a ladder filter to form a passband filter with an unbalanced input port and two balanced output ports. One or more such passband filters can be used, together with another lattice or ladder filter, to form a duplexer having an unbalanced antenna port, two balanced ports for one transceiver part and two balanced ports for another transceiver part.
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