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1.发明申请公开(公告)号：US20040047982A1
公开(公告)日：2004-03-11
申请号：US10466546
申请日：2003-07-24
发明人： Toshiyuki Takagi
IPC分类号： B05D005/12 , H03H003/08
CPC分类号： H03H9/02921 , B82Y10/00 , B82Y40/00 , H01J37/20 , H01J37/28 , H01J37/3174 , H01J2237/004 , H03H3/08 , H03H2260/00
摘要： In a tester for a surface acoustic wave device used as a filter for high frequency bands in the field of mobile communications, the tester includes: an electron gun generating an electron beam to be first electrons; a condenser lens for converging the electron beam on a substrate; an electron beam scanning portion for scanning the electron beam on the substrate; a secondary electron detector detecting second electrons generating from the substrate by irradiated first electrons; a substrate holder holding the substrate; and a conductive grounding tool which can contact the metal film. The grounding tool includes a contacting head. The grounding tool includes: a contacting head that can contact the grounding tool and the metal film; an arm portion arranged at the end of the contacting head; a shaft arranged at the other end of the contacting head, and rotating the arm portion. The substrate has a two-layer structure, which includes: a circular piezo-electric substrate including lithium tantalate (LiTaO3); and a metal film including aluminum (Al) formed on the piezo-electric substrate.
摘要翻译： 在用于在移动通信领域中用作高频带的滤波器的表面声波装置的测试器中，测试仪包括：产生电子束的电子枪为第一电子; 用于将电子束会聚在基板上的聚光透镜; 用于扫描基板上的电子束的电子束扫描部分; 二次电子检测器，检测通过照射的第一电子从衬底产生的第二电子; 保持基板的基板保持架; 以及可与金属膜接触的导电接地工具。 接地工具包括接触头。 接地工具包括：可接触接地工具和金属膜的接触头; 布置在接触头端部的臂部; 布置在接触头的另一端的轴，并使臂部旋转。 该基板具有双层结构，其包括：包括钽酸锂（LiTaO 3）的圆形压电基板; 以及形成在压电基板上的包含铝（Al）的金属膜。
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2.发明申请公开(公告)号：US20030155994A1
公开(公告)日：2003-08-21
申请号：US10337781
申请日：2003-01-08
申请人： ALCATEL
IPC分类号： H03H007/01
CPC分类号： H03H7/1766 , H03H7/06 , H03H7/427 , H03H2260/00
摘要： A passive filter arrangement and a method of providing such a filter is described. The frequency response of the filter arrangement is substantially the same as the frequency response of a first filter of an order having a first value, the frequency response of the first filter being representable by a first set of one or more poles and/or one or more zeros. Descriptions of a plurality of second filters are generated, each second filter having an order lower than the order of the first value, each second filter having a frequency response representable by a one or more poles and/or one or more zeros, the one or more poles and/or one or more zeros of each lower order filter being a subset of the first set. The lower order filters are cascaded.
摘要翻译： 描述了一种无源滤波器装置和提供这种滤波器的方法。 滤波器装置的频率响应基本上与具有第一值的次序的第一滤波器的频率响应基本相同，第一滤波器的频率响应可由第一组一个或多个极和/或一个或多个极表示， 更多零。 产生多个第二滤波器的描述，每个第二滤波器具有低于第一值的次序的顺序，每个第二滤波器具有可由一个或多个极和/或一个或多个零表示的频率响应， 每个低阶滤波器的多个极点和/或一个或多个零点是第一组的子集。 低阶滤波器级联。
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公开(公告)号：US20030020367A1
公开(公告)日：2003-01-30
申请号：US10220759
申请日：2002-09-05
发明人： Yoshio Maeda , Shouichi Komatsu , Yusuke Kinoshita
IPC分类号： H03H009/25
CPC分类号： H03H9/0542 , H03H3/08 , H03H9/0038 , H03H9/0047 , H03H9/02669 , H03H2260/00
摘要： There is provided a piezoelectric substrate (12) in the form of a rectangular plate in which a Rayleigh wave is propagated and an IDT (13) and a reflector (14) provided by forming interdigital electrodes on the piezoelectric substrate. At least an end face on a shorter side of the piezoelectric substrate on a top side thereof is formed as a vertical smooth surface that is substantially in parallel with a conductor strip at an end of the reflector (14) in the position of an imaginary node (J) of a stress wave (T) exiting the conductor strip, there by providing a reflecting end face (15, 16) for reflecting the stress wave.
摘要翻译： 提供了一种矩形板形式的压电衬底（12），其中瑞利波被传播，并且通过在压电衬底上形成叉指电极而提供的IDT（13）和反射器（14）。 至少在其顶侧的压电基板的较短侧上的端面形成为垂直平滑表面，其基本上与反射器（14）的端部处的导体条平行，在假想节点 通过设置用于反射应力波的反射端面（15,16），在离开导体条的应力波（T）的距离（J）。
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公开(公告)号：US3965446A
公开(公告)日：1976-06-22
申请号：US552410
申请日：1975-02-24
CPC分类号： H03H9/02771 , H03H9/02708 , H03H9/02795 , H03H9/6446 , H03H9/72 , H03H2260/00
摘要： This invention comprises in combination a body of piezoelectric material, means for propagating an acoustic wave in a first mode, means for converting a portion of the acoustic wave energy into an acoustic wave in a second mode, a resonant structure in which the acoustic wave energy in the second mode is resonant, means for reconverting the acoustic wave energy in the second mode into surface acoustic wave energy in the first mode, means for providing a predetermined phase shift of the reconverted acoustic wave energy relative to the original propagated acoustic wave energy, and means for recovering the combined acoustic wave energy of the original and phase shift reconverted acoustic wave energies as an electric output signal.
摘要翻译： 本发明包括压电材料体的组合，用于在第一模式中传播声波的装置，用于将声波能量的一部分转换成第二模式的声波的装置，其中声波能量 在第二模式中是谐振的，用于将第二模式中的声波能量重新转换为第一模式中的声表面波能量的装置，用于提供相对于原始传播声波能量的再转换声波能量的预定相移的装置， 以及用于恢复原始和相移再转换声波能量的组合声波能量作为电输出信号的装置。
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公开(公告)号：US20180205365A1
公开(公告)日：2018-07-19
申请号：US15920948
申请日：2018-03-14
申请人： Resonant Inc.
CPC分类号： H03H9/6483 , G06F17/5063 , G06F17/5081 , H03H2260/00
摘要： Methods to design band-pass acoustic wave microwave filters are disclosed. A performance metric related to an input impedance of a baseline filter design is calculated, the baseline filter design including a plurality of series surface acoustic wave resonators and a plurality of shunt surface acoustic wave resonators, each surface acoustic wave resonator having a respective resonant frequency. One or more alternative filter designs is established, each alternative filter design derived from the baseline filter design by reordering the resonant frequencies of two or more of the plurality of series surface acoustic wave resonators and/or two or more of the plurality of shunt surface acoustic wave resonators. A respective performance metric related to an input impedance of each alternative filter designs is calculated. A final filter design is selected from among the baseline filter design and the alternative filter designs based on the respective performance metrics.
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公开(公告)号：US09948277B2
公开(公告)日：2018-04-17
申请号：US15159672
申请日：2016-05-19
申请人： Resonant Inc.
CPC分类号： H03H9/6483 , G06F17/5063 , G06F17/5081 , H03H2260/00
摘要： Methods of designing band-pass filters are disclosed. A baseline filter design is established, the baseline filter design including a plurality of surface acoustic wave resonators having respective resonant frequencies, the surface acoustic wave resonators organized by resonant frequency into two or more groups. One or more alternative filter designs are established, each alternative filter design derived from the baseline filter design by reordering the resonant frequencies of two or more surface acoustic wave resonators within at least one of the two or more groups. A respective performance metric related to input impedance over a pass band is calculated for each of the baseline filter design and the alternative filter designs. A final filter design is selected from the baseline filter design and the alternative filter designs based on the respective performance metrics.
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公开(公告)号：US09882545B2
公开(公告)日：2018-01-30
申请号：US14915298
申请日：2014-07-08
发明人： Thomas Blodt
CPC分类号： H03H7/38 , H03H7/40 , H03H2260/00
摘要： A method for optimizing impedance of a connecting element between a first component and a second component of a high-frequency apparatus. The first component and the second component have at least two level states, wherein the connecting element has an input impedance and an output impedance. The first component has respective impedances in each of the at least two level states, wherein the second component has respective impedances in each of the at least two level states. The method comprising the steps as follows: determining a respective magnitude of a difference of the first component between the complex conjugated input impedance and a respective impedance of the first component, determining a respective magnitude of a difference of the second component between the complex conjugated output impedance and a respective impedance of the second component, and simultaneously minimizing the respective magnitudes of the first component and second component relative to the in- and output impedances of the connecting element.
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公开(公告)号：US20170373662A1
公开(公告)日：2017-12-28
申请号：US15633526
申请日：2017-06-26
发明人： Ashish Kumar , Sreyam Sinha , Khurram K. Afridi
IPC分类号： H03H7/40
CPC分类号： H03H7/40 , H02J50/05 , H02J50/10 , H03H7/38 , H03H2260/00
摘要： Multistage matching networks and analytical frameworks for improving and/or optimizingthe networks is provided. In one example, a framework relaxes the resistive constraint on the input and load impedances of the stages of a multistage matching network and allows them to be complex. Based on this framework, the design of multistage matching networks can be improved or optimized, such as using a method of Lagrange multipliers. A design optimization approach, for example, can be used to predict an optimum distribution of gains and impedance characteristics among the stages of a multistage matching network. The efficiency of matching networks designed using this example approach is compared with a conventional design approach, and it is shown that significant efficiency improvements are possible.
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公开(公告)号：US20120108167A1
公开(公告)日：2012-05-03
申请号：US13283292
申请日：2011-10-27
申请人： Jean-Luc Erb
发明人： Jean-Luc Erb
CPC分类号： H03H9/6436 , H03H9/6476 , H03H2260/00
摘要： A filter may be constructed from multiple acoustic elements in parallel. A filtering method may comprise passing a signal to be filtered through such parallel acoustic elements. Such filtering may be applicable to communication devices.
摘要翻译： 滤波器可以由多个并行的声学元件构成。 滤波方法可以包括通过这样的平行声学元件传递要滤波的信号。 这种过滤可以适用于通信设备。
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公开(公告)号：US20170063336A1
公开(公告)日：2017-03-02
申请号：US15159672
申请日：2016-05-19
申请人： Resonant Inc.
CPC分类号： H03H9/6483 , G06F17/5063 , G06F17/5081 , H03H2260/00
摘要： Methods of designing band-pass filters are disclosed. A baseline filter design is established, the baseline filter design including a plurality of surface acoustic wave resonators having respective resonant frequencies, the surface acoustic wave resonators organized by resonant frequency into two or more groups. One or more alternative filter designs are established, each alternative filter design derived from the baseline filter design by reordering the resonant frequencies of two or more surface acoustic wave resonators within at least one of the two or more groups. A respective performance metric related to input impedance over a pass band is calculated for each of the baseline filter design and the alternative filter designs. A final filter design is selected from the baseline filter design and the alternative filter designs based on the respective performance metrics.
摘要翻译： 公开了设计带通滤波器的方法。 建立了基线滤波器设计，该基线滤波器设计包括具有相应谐振频率的多个表面声波谐振器，由共振频率组合成两个或多个组的表面声波谐振器。 一个或多个替代的滤波器设计被建立，每个替代的滤波器设计通过对两个或更多个组中的至少一个组中的两个或更多个表面声波谐振器的谐振频率进行重新排序而从基线滤波器设计得到。 针对每个基线滤波器设计和替代滤波器设计计算与通带上的输入阻抗相关的相应性能度量。 最后的滤波器设计是从基线滤波器设计和基于相应性能指标的替代滤波器设计中选出的。
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