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公开(公告)号：EP1565984B1
公开(公告)日：2011-07-27
申请号：EP03758528.8
申请日：2003-10-31
申请人： NXP B.V.
发明人： LOBEEK, Jan-Willem
摘要： A duplexer (1) with two band-pass filters (5, 6) comprising film bulk acoustic wave resonators (FBAR) (8, 9, 10, 11, 12, 13) has an extra antiresonant circuit in order to block the transmission signal. It has an extra resonant circuit in order to allow the desired receive signal to pass. The antiresonant circuit comprises the first FBAR (11) and a parallel inductor (14). The resonant circuit comprises the first FBAR (11) and a series inductor (7).
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公开(公告)号：EP2277265A1
公开(公告)日：2011-01-26
申请号：EP09738524.9
申请日：2009-04-24
申请人： NXP B.V.
CPC分类号： H03H9/02118 , H03H9/175 , Y10T29/42 , Y10T29/49005
摘要： A resonator comprises a bottom electrode layer (12), a top electrode layer (10) which defines a resonator body; and a piezoelectric layer (14) sandwiched between the top and bottom electrode layers. An external region (152) is provided around the outside of the periphery of the resonator body. The cutoff frequency of a first resonance mode of the external region (152) is matched to the cutoff frequency of a second, different, resonance mode of the resonator body. The invention provides a deliberate change (typically increase) in the cutoff frequency the resonance modes in the external region, so that one of the modes has a cutoff frequency close to the cutoff frequency of the fundamental mode of the resonator body.
摘要翻译： 谐振器包括底部电极层（12），限定谐振器本体的顶部电极层（10） 和夹在顶部和底部电极层之间的压电层（14）。 外部区域（152）围绕谐振器本体的外围设置。 外部区域（152）的第一谐振模式的截止频率与谐振器主体的第二不同谐振模式的截止频率相匹配。 本发明提供了在外部区域中的谐振模式的截止频率的有意变化（通常增加），使得这些模式之一具有接近谐振器本体的基模的截止频率的截止频率。
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