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公开(公告)号：EP1249934A3
公开(公告)日：2010-02-03
申请号：EP02290880.0
申请日：2002-04-09
发明人： Shibata, Osamu, c/o (A170) Intell. Property Dept. , Takamine, Yuichi, c/o (A170)Intell. Property Dept. , Watanabe, Hiroki, c/o (A170)Intell. Property Dept. , Yata, Masaru, c/o (A170) Intell. Property Dept. , Sawada, Yoichi, c/o (A170) Intell. Property Dept.
CPC分类号： H03H9/008 , H03H9/0038 , H03H9/0042 , H03H9/0061 , H03H9/0071 , H03H9/0085 , H03H9/02748 , H03H9/14517 , H03H9/14532 , H03H9/14547 , H03H9/14576 , H03H9/14579 , H03H9/14582 , H03H9/14585 , H03H9/14588 , H03H9/14591 , H03H9/6436
摘要： Three longitudinal-coupling-resonator-type interdigital transducers (IDTs) (1-3) having a balanced-to-unbalanced conversion function are disposed on a piezoelectric substrate (8) in a direction in which a surface acoustic wave (SAW) propagates. Weighting is applied to at least one (2/3) of the IDTs. For example, among the electrode fingers of the IDT (2) located on the left side, an apodization-weighted electrode finger (22a) is provided for one of the electrode fingers positioned adjacent to the central IDT (1).
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公开(公告)号：EP1175006B1
公开(公告)日：2007-03-21
申请号：EP01901488.5
申请日：2001-01-22
CPC分类号： H03H9/6469 , H03H9/0061 , H03H9/02637 , H03H9/14538 , H03H9/14552 , H03H9/14576 , H03H9/14582 , H03H9/14585
摘要： A filter comprising two cascaded primary-tertiary longitudinal coupling dual-mode SAW filters provided so as to flatten the passband of the filter and three IDT electrodes arranged with electrode finger pitches L1 so as to decrease the VSWR below 2, wherein the pitch L2 of the central IDT electrodes of one of the dual-mode SAW filters is larger than the pitch L1, electrode fingers are symmetrically removed from both sides of the IDT electrode, and the removed electrode fingers are connected to the opposed IDT electrode so as to use them as dummy electrodes with pitches L2.
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公开(公告)号：EP0201766A3
公开(公告)日：1988-09-21
申请号：EP86105543
申请日：1986-04-22
IPC分类号： H03H09/02 , H03H09/145
CPC分类号： H03H9/02874 , H03H9/02629 , H03H9/02637 , H03H9/14585
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公开(公告)号：EP0201766A2
公开(公告)日：1986-11-20
申请号：EP86105543.2
申请日：1986-04-22
CPC分类号： H03H9/02874 , H03H9/02629 , H03H9/02637 , H03H9/14585
摘要： Oberflächenwetienfilter (1, 11, 21, 31, 41) mit zwischen den interdigitalen, unsymmetrisch betriebenen Wandlerstrukturen (2, 3) angeordneter abschirmender Struktur (13, 23, 33, 43, 53), die zwei solche Teilstrukturen (14, 24, 34, 44, 24a) bzw. (15,25,35,45,35a) umfaßt, die jede für sich mit der auf dem Bezugspotential liegenden Fingerstruktur der benachbarten Wandlerstruktur (2 bzw. 3) verbunden ist.
摘要翻译： 表面交指，不对称操作换能器结构之间的声表面波滤波器（1，11，21，31，41）（2,3），其设置屏蔽结构（13，23，33，43，53）（两个这样的子结构14，24，34 其被连接到每个（用于与相邻的换能器结构2的基准电位指状结构的平躺或，24A）或包含（15，25，35，45，35A）44 3）。
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公开(公告)号：EP1249934B1
公开(公告)日：2013-07-31
申请号：EP02290880.0
申请日：2002-04-09
CPC分类号： H03H9/008 , H03H9/0038 , H03H9/0042 , H03H9/0061 , H03H9/0071 , H03H9/0085 , H03H9/02748 , H03H9/14517 , H03H9/14532 , H03H9/14547 , H03H9/14576 , H03H9/14579 , H03H9/14582 , H03H9/14585 , H03H9/14588 , H03H9/14591 , H03H9/6436
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公开(公告)号：EP1175006A4
公开(公告)日：2006-02-08
申请号：EP01901488
申请日：2001-01-22
发明人： TAKAHASHI NAOKI
CPC分类号： H03H9/6469 , H03H9/0061 , H03H9/02637 , H03H9/14538 , H03H9/14552 , H03H9/14576 , H03H9/14582 , H03H9/14585
摘要： A filter comprising two cascaded primary-tertiary longitudinal coupling dual-mode SAW filters provided so as to flatten the passband of the filter and three IDT electrodes arranged with electrode finger pitches L1 so as to decrease the VSWR below 2, wherein the pitch L2 of the central IDT electrodes of one of the dual-mode SAW filters is larger than the pitch L1, electrode fingers are symmetrically removed from both sides of the IDT electrode, and the removed electrode fingers are connected to the opposed IDT electrode so as to use them as dummy electrodes with pitches L2.
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公开(公告)号：EP0201766B1
公开(公告)日：1991-12-18
申请号：EP86105543.2
申请日：1986-04-22
CPC分类号： H03H9/02874 , H03H9/02629 , H03H9/02637 , H03H9/14585
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公开(公告)号：EP1933457B1
公开(公告)日：2015-03-04
申请号：EP06810325.8
申请日：2006-09-20
发明人： TAKAMINE, Yuichi
CPC分类号： H03H9/14526 , H03H9/0071 , H03H9/0085 , H03H9/02748 , H03H9/14532 , H03H9/14576 , H03H9/14582 , H03H9/14585 , H03H9/6476 , H03H9/725
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公开(公告)号：EP1933457A4
公开(公告)日：2013-03-27
申请号：EP06810325
申请日：2006-09-20
发明人： TAKAMINE YUICHI
CPC分类号： H03H9/14526 , H03H9/0071 , H03H9/0085 , H03H9/02748 , H03H9/14532 , H03H9/14576 , H03H9/14582 , H03H9/14585 , H03H9/6476 , H03H9/725
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公开(公告)号：EP1933457A1
公开(公告)日：2008-06-18
申请号：EP06810325.8
申请日：2006-09-20
发明人： TAKAMINE, Yuichi
CPC分类号： H03H9/14526 , H03H9/0071 , H03H9/0085 , H03H9/02748 , H03H9/14532 , H03H9/14576 , H03H9/14582 , H03H9/14585 , H03H9/6476 , H03H9/725
摘要： The present invention provides an acoustic wave filter device capable of adjusting and increasing an attenuation in an attenuation band near a passband with hardly affecting a filter characteristic in the passband.
In an acoustic wave filter device 1, first and second longitudinally coupled resonator SAW filters 7 and 8 are provided on a piezoelectric substrate 1. The first and second longitudinally coupled resonator SAW filters 7 and 8 connect in parallel to each other. The first and second longitudinally coupled resonator SAW filters 7 and 8 are withdrawal-weighted. The withdrawal weighting in at least the longitudinally coupled resonator SAW filter 7 is different from the withdrawal weighting in the other longitudinally coupled resonator SAW filter 8.摘要翻译： 本发明提供了一种能够在通带附近调节和增加衰减频带衰减的声波滤波器装置，几乎不影响通带中的滤波器特性。 在声波滤波器装置1中，第一和第二纵向耦合谐振器SAW滤波器7和8设置在压电基片1上。第一和第二纵向耦合的谐振器SAW滤波器7和8彼此并联。 第一和第二纵向耦合的谐振器SAW滤波器7和8是撤销加权的。 至少纵向耦合的谐振器SAW滤波器7中的提取加权与其他纵向耦合的谐振器SAW滤波器8中的提取加权不同。
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