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1.发明授权Inter-digital transducer, surface acoustic wave filter and communication apparatus using the same 有权数字式换能器，表面声波滤波器及使用其的通信装置公开(公告)号：US06801100B2
公开(公告)日：2004-10-05
申请号：US10051310
申请日：2002-01-22
IPC分类号： H03H964
CPC分类号： H03H9/0042 , H03H9/0038 , H03H9/0061 , H03H9/02763 , H03H9/14588 , H03H9/6436 , H03H9/6443 , H03H9/6463 , H03H9/6479
摘要： An inter-digital transducer has a piezoelectric substrate; and an IDT (inter-digital transducer) electrode having a pair of upper bus bar electrode and lower bus bar electrode placed facing each other on the piezoelectric substrate and a plurality of electrode fingers placed on the piezoelectric substrate each being led out from either the upper bus bar electrode or the lower bus bar electrode toward the other bus bar electrode, wherein the IDT electrode is constructed of a plurality of divisional IDT electrodes and connected to a balanced type terminal.
摘要翻译： 数字式换能器具有压电基板; 以及IDT（数字式换能器）电极，其具有在压电基板上彼此面对的一对上汇流条电极和下汇流条电极，并且设置在压电基板上的多个电极指每个从上部 汇流条电极或下汇流条电极朝向另一母线电极，其中IDT电极由多个分开的IDT电极构成并连接到平衡型端子。
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2.发明授权公开(公告)号：US06710683B2
公开(公告)日：2004-03-23
申请号：US10114866
申请日：2002-04-01
申请人： Hiroyuki Nakamura , Toru Yamada , Kazunori Nishimura , Tsutomu Igaki , Shigeru Tsuzuki , Ken Matsunami , Toshio Ishizaki
发明人： Hiroyuki Nakamura , Toru Yamada , Kazunori Nishimura , Tsutomu Igaki , Shigeru Tsuzuki , Ken Matsunami , Toshio Ishizaki
IPC分类号： H03H964
CPC分类号： H03H9/6426
摘要： A surface acoustic wave filter has a piezoelectric substrate and at least two interdigital transducer electrodes on the piezoelectric substrate, wherein at least one of the interdigital transducer electrodes includes a unidirectional electrode and bidirectional electrode, and the length &lgr;d of a basic cell of the unidirectional electrode is longer than the length &lgr;s of a basic cell of the bidirectional electrode.
摘要翻译： 表面声波滤波器在压电基板上具有压电基板和至少两个叉指式换能器电极，其中叉指式换能器电极中的至少一个包括单向电极和双向电极，并且单向电极的基本单元的长度lambdad为 长于双向电极的基本电池的长度lambdas。
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3.发明授权公开(公告)号：US06351196B1
公开(公告)日：2002-02-26
申请号：US09390653
申请日：1999-09-07
IPC分类号： H03H964
CPC分类号： H03H9/6443 , H03H9/0028 , H03H9/02763 , H03H9/02913 , H03H9/02992 , H03H9/14588 , H03H9/14597 , H03H9/6463 , H03H9/6479
摘要： Disclosed is a surface acoustic wave filter on a piezoelectric substrate. The filter includes at least two surface acoustic wave resonators that each has a reflector electrode on both sides of an IDT electrode as an inter-digital transducer electrode. At least two of the resonators are disposed on a piezoelectric substrate in positions near each other so that the propagation direction of surface acoustic waves are in parallel to make an acoustic coupling. In an embodiment, the acoustic coupling is a direct coupling. The IDT electrode has a plurality of electrode fingers connected so as not to cancel respective electric charges. The IDT electrode is constituted by at least three divisional IDT electrodes. A pair of the electrode fingers can have a reverse phase relation with respect to each other. Also, in a multi-stage surface acoustic wave filter, the electrode fingers can be included in an upper IDT electrode of a top stage of the filter, and in a lower IDT electrode of a bottom stage of such filter.
摘要翻译： 公开了压电基板上的表面声波滤波器。 滤波器包括至少两个表面声波谐振器，每个表面声波谐振器在IDT电极的两侧上具有作为数字间换能器电极的反射器电极。 至少两个谐振器在彼此相邻的位置处设置在压电基板上，使得声表面波的传播方向平行以形成声耦合。 在一个实施例中，声耦合是直接耦合。 IDT电极具有连接成不抵消各自的电荷的多个电极指。 IDT电极由至少三个分开的IDT电极构成。 一对电极指可以相对于彼此具有反相位关系。 此外，在多级表面声波滤波器中，电极指可以包括在过滤器的顶级的上部IDT电极中，并且可以包括在该过滤器的底部的下部IDT电极中。
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4.发明授权公开(公告)号：US06348845B2
公开(公告)日：2002-02-19
申请号：US09794035
申请日：2001-02-28
IPC分类号： H03H964
CPC分类号： H03H9/6479 , H03H9/0028 , H03H9/02763 , H03H9/02913 , H03H9/02992 , H03H9/14588 , H03H9/14597 , H03H9/6443 , H03H9/6463
摘要： A surface acoustic wave resonator is constituted by an IDT electrode and reflector electrodes disposed on both sides thereof, on a piezoelectric substrate. Two of said surface acoustic wave resonators are disposed nearby so that the propagation directions of the respective surface acoustic waves are in parallel to each other to make acoustic couple to constitute a surface acoustic wave filter having plural exciting modes with different propagation frequencies. The bus bar electrodes of each of two IDT electrodes are electrically separated from each other, and the leading out electrodes led out from at least two spots on those bus bar electrodes are electrically connected to each other, by which one side of the balanced input and output terminal. As a result, the electrode resistance of the IDT electrode is alleviated to make the insertion loss less.
摘要翻译： 表面声波谐振器由压电基板上的IDT电极和设置在其两侧的反射器电极构成。 两个所述表面声波谐振器被设置在附近，使得各声表面波的传播方向彼此平行，以使声耦合构成具有不同传播频率的多个激励模式的表面声波滤波器。 两个IDT电极中的每一个的汇流条电极彼此电分离，并且从那些汇流条电极上的至少两个点引出的引出电极彼此电连接，平衡输入的一侧和 输出端子。 结果，减轻了IDT电极的电极电阻，使插入损耗减小。
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5.发明授权Surface acoustic wave filter and multistage filter with multiple inside busbar lead-out electrodes 失效表面声波滤波器和具有多个内部母线引出电极的多级滤波器
公开(公告)号：US5990762A
公开(公告)日：1999-11-23
申请号：US862383
申请日：1997-05-23
CPC分类号： H03H9/6443 , H03H9/0028 , H03H9/02763 , H03H9/02992 , H03H9/14588 , H03H9/6463 , H03H9/6479 , H03H9/02913 , H03H9/14597
摘要： A surface acoustic wave resonator is constituted by an IDT electrode and reflector electrodes disposed on both sides thereof, on a piezoelectric substrate. Two of said surface acoustic wave resonators are disposed nearby so that the propagation directions of the respective surface acoustic waves are in parallel to each other to make acoustic couple to constitute a surface acoustic wave filter having plural exciting modes with different propagation frequencies. The bus bar electrodes of each of two IDT electrodes are electrically separated from each other, and the leading out electrodes led out from at least two spots on those bus bar electrodes are electrically connected to each other, by which one side of the balanced input and output terminal. As a result, the electrode resistance of the IDT electrode is alleviated to make the insertion loss less.
摘要翻译： 表面声波谐振器由压电基板上的IDT电极和设置在其两侧的反射器电极构成。 两个所述表面声波谐振器被设置在附近，使得各声表面波的传播方向彼此平行，以使声耦合构成具有不同传播频率的多个激励模式的表面声波滤波器。 两个IDT电极中的每一个的汇流条电极彼此电分离，并且从那些汇流条电极上的至少两个点引出的引出电极彼此电连接，平衡输入的一侧和 输出端子。 结果，减轻了IDT电极的电极电阻，使插入损耗减小。
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公开(公告)号：US5932950A
公开(公告)日：1999-08-03
申请号：US693383
申请日：1996-08-06
CPC分类号： H03H9/6479 , H03H9/0028 , H03H9/0542 , H03H9/14591 , H03H9/14597 , H03H9/6433 , H03H9/6463 , H03H7/38
摘要： A SAW resonator disposed with an IDT electrode and reflector electrodes is formed on the surface of a piezoelectric substrate. Three pieces of the SAW resonator form an acoustic coupling by being disposed close to each other, electrode fingers comprising the IDT electrode in the center are all grounded, and IDT electrode fingers are electrically independent on the side to be connected to input-output terminals of the IDT electrodes disposed outside. As a result, three excitation modes having different propagation frequencies are generated which are used to attain a broad band SAW resonator filter. When these three pairs of the IDT electrode are electrically independent, a balanced input-output can be achieved, and excellent out-of-band rejection characteristics can be obtained.
摘要翻译： 设置有IDT电极和反射器电极的SAW谐振器形成在压电基板的表面上。 三个SAW谐振器通过彼此靠近地布置形成声耦合，包括中心的IDT电极的电极指全部接地，并且IDT电极指在与要连接到的输入输出端子 IDT电极位于外部。 结果，产生了具有不同传播频率的三种激励模式，用于获得宽带SAW谐振滤波器。 当这三对IDT电极是电独立的时，可以实现平衡的输入 - 输出，并且可以获得优异的带外抑制特性。
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公开(公告)号：US5581141A
公开(公告)日：1996-12-03
申请号：US319790
申请日：1994-10-07
CPC分类号： H03H9/6479 , H03H9/0028 , H03H9/0542 , H03H9/14591 , H03H9/14597 , H03H9/6433 , H03H9/6463 , H03H7/38
摘要： A SAW resonator disposed with an IDT electrode and reflector electrodes is formed on the surface of a piezoelectric substrate. Three pieces of the SAW resonator form an acoustic coupling by being disposed close to each other, electrode fingers comprising the IDT electrode in the center are all grounded, and IDT electrode fingers are electrically independent on the side to be connected to input-output terminals of the IDT electrodes disposed outside. As a result, three excitation modes having different propagation frequencies are generated which are used to attain a broad band SAW resonator filter. When these three pairs of the IDT electrode are electrically independent, a balanced input-output can be achieved, and excellent out-of-band rejection characteristics can be obtained.
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8.发明授权公开(公告)号：US06822534B2
公开(公告)日：2004-11-23
申请号：US10221971
申请日：2003-01-10
申请人： Kazuhide Uriu , Hiroyuki Nakamura , Toru Yamada , Tsutomu Matsumura , Hiroshi Kagata , Kouji Kawakita , Toshio Ishizaki
发明人： Kazuhide Uriu , Hiroyuki Nakamura , Toru Yamada , Tsutomu Matsumura , Hiroshi Kagata , Kouji Kawakita , Toshio Ishizaki
IPC分类号： H03H701
CPC分类号： H01P1/20345 , H01P1/2039
摘要： A laminated filter includes: a first dielectric layer having a first shield electrode on one principal plane; a second dielectric layer having resonator electrodes on one principal plane; a third dielectric layer having a coupling electrode provided facing part of the above-described resonator electrodes; a fourth dielectric layer having a second shield electrode on one principal plane; a fifth dielectric layer whose at least one principal plane is exposed outside; and a grounding electrode provided on the other principal plane of the above-described dielectric layer and/or the above-described one principal plane of the above-described fifth dielectric layer, and the above-described first grounding electrode and the above-described first shield electrode are electrically connected through a via hole provided in the above-described first dielectric layer.
摘要翻译： 层压滤波器包括：第一介电层，其在一个主平面上具有第一屏蔽电极; 一个第二电介质层，在一个主平面上具有谐振器电极; 第三电介质层，其具有面对所述谐振器电极的一部分设置的耦合电极; 第四电介质层，在一个主平面上具有第二屏蔽电极; 第五电介质层，其至少一个主平面暴露在外面; 以及设置在上述介电层的另一个主面上的接地电极和/或上述第五电介质层的上述一个主面，以及上述第一接地电极和上述第一接地电极 屏蔽电极通过设置在上述第一电介质层中的通孔电连接。
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公开(公告)号：US06784759B2
公开(公告)日：2004-08-31
申请号：US10202799
申请日：2002-07-25
IPC分类号： H03H746
CPC分类号： H01P1/2135 , H01L2223/6677 , H01L2224/16227 , H01L2224/81192 , H01L2924/15153 , H01L2924/15159 , H01L2924/15192 , H01L2924/15313 , H01L2924/15323 , H01L2924/3511 , H03H9/0576 , H03H9/725 , H03H2007/013
摘要： An antenna duplexer has a receiving filter having a surface acoustic wave device; a transmitting filter having a dielectric resonator; and a matching circuit for matching the receiving filter and the transmitting filter with an antenna respectively, wherein the transmitting filter, receiving filter, and matching circuit are integrated with each other.
摘要翻译： 天线双工器具有具有表面声波装置的接收滤波器;具有介质谐振器的发射滤波器; 以及分别与天线匹配接收滤波器和发射滤波器的匹配电路，其中发射滤波器，接收滤波器和匹配电路彼此集成。
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10.发明授权3-frequency branching circuit, branching circuit and radio communication equipment 失效3频分支电路，分支电路和无线电通信设备公开(公告)号：US07324493B2
公开(公告)日：2008-01-29
申请号：US10311915
申请日：2001-06-25
IPC分类号： H04B7/216
摘要： A 3-frequency branching circuit in the past could not be used for a system wherein a TDMA method such as GSM and DCS and a W-CDMA method such as UMTS are mixed. The 3-frequency branching circuit equipped with branching means having first and second internal terminals, an antenna terminal of connecting to an antenna, a low-pass filter connected between the first internal terminal and the antenna terminal, and a high-pass filter connected between the second internal terminal and the antenna terminal, a switching circuit of switching between GSM TX and GSM RX, a switching circuit of switching between DCS TX, DCS RX and a third internal terminal, and a duplexer connected to the third internal terminal.
摘要翻译： 过去的3频分支电路不能用于其中诸如GSM和DCS的TDMA方法和诸如UMTS的W-CDMA方法的系统混合。 具有分支装置的3频分支电路具有第一和第二内部端子，连接到天线的天线端子，连接在第一内部端子和天线端子之间的低通滤波器以及连接在第一内部端子和天线端子之间的高通滤波器 第二内部终端和天线终端，在GSM TX和GSM RX之间切换的切换电路，在DCS TX，DCS RX和第三内部终端之间切换的切换电路以及连接到第三内部终端的双工器。
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