发明名称 |
Bulk acoustic wave resonator with two piezoelectric layers as balun in filters and duplexers |
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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申请公布号 |
US6670866(B2) |
申请公布日期 |
2003.12.30 |
申请号 |
US20020045645 |
申请日期 |
2002.01.09 |
申请人 |
NOKIA CORPORATION;INFINEON TECHNOLOGIES AG |
发明人 |
ELLAE JUHA;AIGNER ROBERT |
分类号 |
H03H7/42;H03H9/00;H03H9/54;H03H9/58;H03H9/70;(IPC1-7):H03H9/54;H03H9/205;H01L41/00 |
主分类号 |
H03H7/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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