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1. 发明授权

US5635883A Acoustic wave filter with filter-shaping element and method 失效
标题翻译：带滤波整形元件的声波滤波器及方法
公开(公告)号：US5635883A
公开(公告)日：1997-06-03
申请号：US520063
申请日：1995-08-28
申请人： David Penunuri , Thomas S. Hickernell , Frederick Yi-Tung Cho
发明人： David Penunuri , Thomas S. Hickernell , Frederick Yi-Tung Cho
IPC分类号： H03H3/08 , H03H9/00 , H03H9/02 , H03H9/145 , H03H9/25 , H03H9/64
CPC分类号： H03H9/6436 , H03H9/1452
摘要： An acoustic wave filter (200, 300) having a substrate for supporting propagation of acoustic waves, and first (220, 315), second (235, 330) and third (210, 310) acoustic wave transducers disposed on the substrate. The first acoustic wave transducer (220, 315) includes at least one bus bar (221, 316) electrically coupled to a first electrical port (205, 305) of the acoustic wave filter (200, 300). The second acoustic wave transducer (235, 330) is disposed on the substrate in line with the first acoustic wave transducer (220, 315) and is acoustically coupled thereto. The second acoustic wave transducer (235, 330) includes at least one bus bar (236', 331) electrically coupled to a second electrical port (240, 345) of the acoustic wave filter (200, 300). The third acoustic wave transducer (210, 310) includes at least one bus bar (211, 311') electrically coupled to the first electrical port (205, 305). The third acoustic wave transducer (210, 310) is acoustically decoupled from either the first (220, 315) or second (235, 330) acoustic wave transducers.
摘要翻译：具有用于支撑声波传播的衬底的声波滤波器（200,300）和设置在衬底上的第一（220,315），第二（235,330）和第三（210,310）声波换能器。第一声波换能器（220,315）包括电耦合到声波滤波器（200,300）的第一电气端口（205,305）的至少一个汇流条（221,316）。第二声波换能器（235,330）设置在与第一声波换能器（220,315）一致的衬底上，并与其声学耦合。第二声波换能器（235,330）包括电耦合到声波滤波器（200,300）的第二电端口（240,345）的至少一个汇流条（236'，331）。第三声波换能器（210,310）包括电耦合到第一电气端口（205,305）的至少一个汇流条（211,311'）。第三声波换能器（210,310）与第一声波换能器（220,315）或第二声波换能器（235,330）的声学去耦合。

2. 发明授权

US5162689A Single-phase uni-directional acoustic wave transducer 失效
标题翻译：单相单向声波换能器
公开(公告)号：US5162689A
公开(公告)日：1992-11-10
申请号：US694516
申请日：1991-05-01
申请人： Frederick M. Fliegel , David Penunuri , Thomas S. Hickernell
发明人： Frederick M. Fliegel , David Penunuri , Thomas S. Hickernell
IPC分类号： H03H9/02 , H03H9/145
CPC分类号： H03H9/02976 , H03H9/14505
摘要： An acoustic transducer for an acoustic wave device which includes an acoustic wave propagating substrate, the transducer adapted to couple to an electrical load and/or source. The transducer includes at least a pair of comb electrodes formed on the substrate. It includes apparatus for applying an electrical load and/or source across the pair of comb electrodes. The first of the combs has a plurality of electrode fingers. The second comb has at least one electrode finger. The widths of the electrode fingers are the same. Gaps of at least two different widths are disposed between the electrodes.
摘要翻译：一种用于声波装置的声换能器，其包括声波传播基片，所述换能器适于耦合到电负载和/或源。换能器包括形成在基板上的至少一对梳状电极。它包括用于在一对梳电极上施加电负载和/或源的装置。第一梳子具有多个电极指。第二梳具有至少一个电极指。电极指的宽度相同。至少两个不同宽度的间隙设置在电极之间。

3. 发明授权

US5434466A Acoustic wave filter with reduced bulk-wave scattering loss and method 失效
标题翻译：具有减小体波散射损失的声波滤波器和方法
公开(公告)号：US5434466A
公开(公告)日：1995-07-18
申请号：US251159
申请日：1994-05-31
申请人： Thomas S. Hickernell , David Penunuri
发明人： Thomas S. Hickernell , David Penunuri
IPC分类号： H03H9/02 , H03H9/64 , H01L41/08
CPC分类号： H03H9/02724 , H03H9/02866 , H03H9/6479 , H03H9/6483
摘要： An acoustic wave filter with reduced bulk-wave scattering loss has a center frequency and an associated acoustic wavelength. The filter includes a substrate and a first reflector having a first group of periodically disposed reflective elements. The filter includes a first transducer on a first side of the first reflector. The filter also includes a first gap having a first width, located between the first reflector and the first transducer. The first width exceeds one-fourth of the acoustic wavelength. The filter includes a second reflector and a second gap disposed between the first transducer and the second reflector. The second gap has a second breadth exceeding one-fourth of the acoustic wavelength. A first waveguiding element is positioned within the first gap and having a first breadth. The first width exceeds the first breadth.
摘要翻译：具有减小的体波散射损失的声波滤波器具有中心频率和相关的声波长。滤光器包括基板和具有第一组周期性布置的反射元件的第一反射器。滤波器包括在第一反射器的第一侧上的第一换能器。滤波器还包括位于第一反射器和第一换能器之间的具有第一宽度的第一间隙。第一宽度超过声波长的四分之一。该过滤器包括第二反射器和设置在第一换能器和第二反射器之间的第二间隙。第二间隙具有超过声波长四分之一的第二宽度。第一波导元件位于第一间隙内并且具有第一宽度。第一个宽度超过第一个宽度。

4. 发明授权

US5327626A Method for processing robust acoustic reflectors 失效
标题翻译：强化声反射器的处理方法
公开(公告)号：US5327626A
公开(公告)日：1994-07-12
申请号：US976749
申请日：1992-11-16
申请人： Frederick Y. Cho , Thomas S. Hickernell , David Penunuri
发明人： Frederick Y. Cho , Thomas S. Hickernell , David Penunuri
IPC分类号： H03H9/02 , H01L41/22
CPC分类号： H03H9/02653 , H03H9/02637 , Y10T29/42
摘要： A reflector arrangement for an acoustic wave device comprises an acoustic wave propagating substrate, reflection elements having at least two different widths separated by at least one gap breadth disposed on the acoustic wave propagating substrate. The at least two different widths enhance reflected waves produced by the propagating acoustic wave in such a fashion as to achieve a total acoustic reflectivity which is independent of variations in width of the reflection elements.
摘要翻译：用于声波装置的反射器装置包括声波传播基板，具有至少两个不同宽度的反射元件，该至少两个不同的宽度被布置在声波传播基板上的至少一个间隙宽度分开。至少两个不同的宽度增强了由传播声波产生的反射波，以便实现与反射元件的宽度的变化无关的全部声反射率。

5. 发明授权

US5296824A Low loss wide bandwidth parallel channel acoustic filter 失效
标题翻译：低损耗宽带宽并行通道声滤波器
公开(公告)号：US5296824A
公开(公告)日：1994-03-22
申请号：US801297
申请日：1991-12-02
申请人： Frederick Y. Cho , Thomas S. Hickernell , David Penunuri
发明人： Frederick Y. Cho , Thomas S. Hickernell , David Penunuri
IPC分类号： H03H9/02 , H03H9/145 , H03H9/25 , H03H9/64
CPC分类号： H03H9/0285 , H03H9/14505 , H03H9/6433 , H03H9/6469 , H03H9/1452
摘要： An acoustic wave filtering apparatus includes an acoustic wave propagating substrate for supporting propagation of acoustic waves and a plurality of acoustic wave filters for filtering an electrical signal. Each of said plurality further comprises an input for supplying electrical input signals, an input unidirectional acoustic wave transducer for converting electrical signal energy into acoustic energy, an output unidirectional acoustic wave transducer for converting acoustic signals to electrical signals, and an output for combining and delivering electrical output signals to external electrical apparatus.
摘要翻译：声波滤波装置包括用于支撑声波传播的声波传播基板和用于滤波电信号的多个声波滤波器。所述多个的每一个还包括用于提供电输入信号的输入端，用于将电信号能量转换为声能的输入单向声波换能器，用于将声信号转换为电信号的输出单向声波换能器，以及用于组合和传递的输出电气输出信号到外部电气设备。

6. 发明授权

US6025762A Delay line incorporating a surface acoustic wave ladder filter and method of providing same 失效
标题翻译：包含表面声波滤波器的延迟线及其提供方法
公开(公告)号：US6025762A
公开(公告)日：2000-02-15
申请号：US228898
申请日：1999-01-11
申请人： Manas K. Roy , David Penunuri , Thomas S. Hickernell
发明人： Manas K. Roy , David Penunuri , Thomas S. Hickernell
IPC分类号： H03H3/08 , H03H9/42 , H03H9/64
CPC分类号： H03H9/6483 , H03H3/08 , H03H9/42
摘要： A method (100) of providing a time delay to a signal utilizing a surface acoustic wave ladder filter includes a first step (102) of providing a piezoelectric substrate. A second step (104) includes disposing series and shunt coupled surface acoustic wave transducers in a ladder configuration on the substrate with each of the transducers having an associated aperture and an associated number of interdigital electrode elements. A third step (106) includes configuring the associated aperture and an associated number of interdigital electrode elements for each surface acoustic wave transducer for maximum phase linearity of the ladder filter and uniform group delay response from the ladder filter. A fourth step (108) includes adjusting the number of transducers in the ladder filter to provide a desired average group delay. Subsequently passing a signal through the ladder filter will delay the signal by a time equal to the group delay.
摘要翻译：使用表面声波滤波器对信号提供时间延迟的方法（100）包括提供压电基片的第一步骤（102）。第二步骤（104）包括将基片上的梯形配置中的串联和分流耦合表面声波换能器布置成每个换能器具有相关联的孔和相关联的数量的叉指电极元件。第三步骤（106）包括为每个表面声波换能器配置相关联的孔径和相关数量的叉指电极元件，用于梯形滤波器的最大相位线性度和来自梯形滤波器的均匀组延迟响应。第四步骤（108）包括调整梯形滤波器中的换能器数量以提供期望的平均组延迟。随后通过梯形滤波器传递信号将使信号延迟等于组延迟的时间。

7. 发明授权

US5212420A Method and apparatus for surface acoustic wave reflector grating 失效
标题翻译：表面声波反射器光栅的方法和装置
公开(公告)号：US5212420A
公开(公告)日：1993-05-18
申请号：US754477
申请日：1991-09-03
申请人： Thomas S. Hickernell , David Penunuri , Frederick Y. Cho
发明人： Thomas S. Hickernell , David Penunuri , Frederick Y. Cho
IPC分类号： H03H3/08 , H03H9/02 , H03H9/25 , H03H9/64
CPC分类号： H03H9/02637 , H03H9/02653
摘要： An acoustic wave device comprises an acoustic wave transducer coupled to an acoustic wave propagating substrate. The acoustic wave transducer converts signal energy between electrical and acoustical forms. Acoustic reflectors are placed one on either side of the acoustic wave transducer. The acoustic reflectors are composed of acoustic reflection elements spaced approximately one wavelength apart, and provide enhanced acoustic acoustic reflections together with relaxed fabrication constraints.

8. 发明授权

US5638036A Acoustic wave ladder filter with unequal series and shunt transducer periodicities and method of making 失效
标题翻译：具有不等系列和分流传感器周期性和制作方法的声波梯形滤波器
公开(公告)号：US5638036A
公开(公告)日：1997-06-10
申请号：US526340
申请日：1995-09-11
申请人： David Penunuri , Thomas S. Hickernell
发明人： David Penunuri , Thomas S. Hickernell
IPC分类号： H03H3/08 , H03H9/145 , H03H9/25 , H03H9/64
CPC分类号： H03H9/6483 , Y10T29/42
摘要： A method and apparatus for a ladder filter (300, 400) incorporating same. The filter (100) includes a substrate and a first series resonator (100, 305, 403) disposed on the substrate and electrically coupled in series between the first electrical port (301, 401) and a first node. The first series resonator (100, 305, 403) includes a first series acoustic reflector (303), a first series gap (112), a first series transducer (105, 304, 403), a second series gap (112) and a second series acoustic reflector (115', 306) collectively disposed in an in-line configuration along a principal axis of the substrate. The filter (300, 400) also includes a first shunt resonator (100', 310, 404) disposed on the substrate and electrically coupled in shunt between the first node and ground. The first shunt transducer (105', 312, 404) and the first series transducer (105, 304, 403) have different periodicities not equal to periodicities of the first and second series acoustic reflectors (303, 306) and the first and second shunt acoustic reflectors (311, 313).
摘要翻译：一种并入其的梯形滤波器（300,400）的方法和装置。滤波器（100）包括衬底和设置在衬底上并串联电耦合在第一电端口（301,401）和第一节点之间的第一串联谐振器（100,305,403）。第一串联谐振器（100,305,403）包括第一串联声反射器（303），第一串联间隙（112），第一串联换能器（105,304,403），第二串联间隙（112）和沿着衬底的主轴线共同设置的第二系列声反射器（115'，306）。滤波器（300,400）还包括设置在基板上并在第一节点和地之间并联电耦合的第一并联谐振器（100'，310,404）。第一并联换能器（105'，312,404）和第一串联换能器（105,304,403）具有不等于第一和第二串联声反射器（303,306）的周期性和第一和第二分流器声反射器（311,313）。

9. 发明授权

US5600287A Acoustic wave filter with reduced bulk-wave scattering loss, ladder filter incorporating same and method 失效
标题翻译：具有减小体波散射损失的滤波器，结合相同的梯形滤波器和方法
公开(公告)号：US5600287A
公开(公告)日：1997-02-04
申请号：US451827
申请日：1995-05-26
申请人： Philip P. Kwan , Thomas S. Hickernell , David Penunuri
发明人： Philip P. Kwan , Thomas S. Hickernell , David Penunuri
IPC分类号： H03H9/02 , H03H9/64
CPC分类号： H03H9/02724 , H03H9/02866 , H03H9/6479 , H03H9/6483
摘要： A method and apparatus for an acoustic wave filter (110) with reduced bulk-wave scattering loss and a ladder filter (30, 40) incorporating same. The method includes steps of providing an acoustic wave propagating substrate (111) and disposing a first reflector (112) on a first surface thereof. The method also includes disposing a first transducer (115) to a first side of the first reflector (112). The first transducer (115) is separated from the first reflector (112) by a first gap (118) having a first width (114) exceeding one-fourth of the acoustic wavelength. The method also includes disposing a second reflector (112') to a side of the first transducer (115) opposite the first reflector (112). The first (112) and second (112') reflectors each include a group of periodically disposed reflective elements (113, 113'). The second reflector (112') is separated from the first transducer (115) by a second gap (140) having a second width (139). The method also includes disposing a first waveguiding element (116) having a first breadth (117) within the first gap (118).
摘要翻译：一种具有减小的体波散射损失的声波滤波器（110）的方法和装置，以及包括其的梯形滤波器（30,40）。该方法包括以下步骤：提供声波传播基片（111）并在其第一表面上设置第一反射器（112）。该方法还包括将第一换能器（115）设置到第一反射器（112）的第一侧。第一传感器（115）通过具有超过声波长四分之一的第一宽度（114）的第一间隙（118）与第一反射器（112）分离。该方法还包括将第二反射器（112'）设置在与第一反射器（112）相对的第一换能器（115）侧。第一（112）和第二（112'）反射器各自包括一组周期性布置的反射元件（113,113'）。第二反射器（112'）通过具有第二宽度（139）的第二间隙（140）与第一换能器（115）分离。该方法还包括在第一间隙（118）内布置具有第一宽度（117）的第一波导元件（116）。

10. 发明授权

US5313177A Method and apparatus for an acoustic wave filter 失效
标题翻译：声波滤波器的方法和装置
公开(公告)号：US5313177A
公开(公告)日：1994-05-17
申请号：US864263
申请日：1992-04-06
申请人： Thomas S. Hickernell , David Penunuri
发明人： Thomas S. Hickernell , David Penunuri
IPC分类号： H03H9/02 , H03H9/145 , H03H9/64 , H03H9/00
CPC分类号： H03H9/14505 , H03H9/02779 , H03H9/02913 , H03H9/02921
摘要： A low-loss acoustic wave filter includes a piezoelectric substrate, a first strongly unidirectional acoustic wave transducer and a second strongly unidirectional acoustic wave transducer. Each of the first and second strongly unidirectional acoustic wave transducers are acoustically coupled to one another. Each of the first and second strongly unidirectional acoustic wave transducers further comprises an acoustic wave reflector and a weakly unidirectional acoustic wave transducer. The acoustic wave reflector and the weakly unidirectional acoustic wave transducer are coupled to the piezoelectric substrate.
摘要翻译：低损耗声波滤波器包括压电基板，第一强单向声波换能器和第二强单向声波换能器。第一和第二强单向性声波换能器中的每一个彼此声学耦合。第一和第二强单向声波换能器中的每一个还包括声波反射器和弱单向声波换能器。声波反射器和弱单向声波传感器耦合到压电基片。

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