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1. 发明授权

US4841265A Surface acoustic wave filter 失效
标题翻译：表面声波滤波器
公开(公告)号：US4841265A
公开(公告)日：1989-06-20
申请号：US249024
申请日：1988-09-26
申请人： Takaya Watanabe , Shigeo Fushimi
发明人： Takaya Watanabe , Shigeo Fushimi
IPC分类号： H03H9/145
CPC分类号： H03H9/14517
摘要： A surface acoustic wave (SAW) filter has a piezoelectric substrate and a conductive transducer formed over the substrate. The transducer has first and second bus bars arranged in parallel at a prescribed interval from each other, a plurality of pairs of first electrode fingers having the same lengths, and a plurality of pairs of second electrode fingers having the same lengths. The tips of the second electrode fingers are positioned opposite those of the first electrode fingers. The transducer also has first and second weighted electrode pairs positioned between two adjacent pairs of the first electrode fingers and two adjacent pairs of the second electrode fingers, respectively. Each pair of first weighted electrodes has a pair of first electrode sections whose lengths of overlap with the paired second electrode fingers are determined by the negative tap coefficients of an FIR filter having a desired low pass characteristic and a pair of second electrode sections positioned on the elongations of these first electrode sections, one end of each such second electrode section been connected to the first bus bar. The second weighted electrode pairs are similarly formed, but the lengths of overlap are determined by the positive tap coefficients of the FIR filter.
摘要翻译：表面声波（SAW）滤波器具有形成在基板上的压电基板和导电换能器。换能器具有以规定的间隔彼此平行地布置的第一和第二汇流条，具有相同长度的多对第一电极指以及具有相同长度的多对第二电极指。第二电极指的尖端与第一电极指的位置相对。换能器还具有分别位于两对相邻的第一电极指和第二电极指的相邻对之间的第一和第二加权电极对。每对第一加权电极具有一对第一电极部分，其与成对的第二电极指的重叠长度由具有期望的低通特性的FIR滤波器的负抽头系数确定，并且一对第二电极部分位于这些第一电极部分的伸长率，每个这样的第二电极部分的一端连接到第一母线。类似地形成第二加权电极对，但是重叠的长度由FIR滤波器的正抽头系数确定。

2. 发明授权

US4910426A Three-transducer saw device including one or two apodized transducers having minimum-phase and maximum-phase impulse responses 失效
标题翻译：三传感器锯设备包括一个或两个变迹传感器，具有最小相位和最大相位的脉冲响应
公开(公告)号：US4910426A
公开(公告)日：1990-03-20
申请号：US249156
申请日：1988-09-26
申请人： Takaya Watanabe , Shigeo Fushimi
发明人： Takaya Watanabe , Shigeo Fushimi
IPC分类号： H03H3/08 , H03H9/145 , H03H9/64
CPC分类号： H03H9/6426
摘要： In a three-transducer surface acoustic wave device, an apodized electrode member is interposed between two interdigital electrode members, each having first and second ends and comprising interdigital electrodes between the first and the second ends either with a uniform density distribution or with a density distribution varied according to a prescribed rule of selective withdrawal of the interdigital electrodes. The apodized electrode member has first and second extremities and is given substantially minimum-phase and maximum-phase impulse responses for surface acoustic waves which are propagated either into or out of the apodized electrode member through one and the other of the extremities. Alternatively, an interdigital electrode member is interposed between two apodized electrode members. Each of the interdigital and the apodized electrode members is of the type described above. One of the apodized electrode member should have a substantially minimum-phase impulse response. The other should have a substantially maximum-phase impulse response.

3. 发明授权

US06517274B1 Sealed joining of two parts each having joining surfaces meeting at right angles 有权
标题翻译：两个部件的密封接合，每个部件具有直角相交的接合面
公开(公告)号：US06517274B1
公开(公告)日：2003-02-11
申请号：US09572964
申请日：2000-05-18
申请人： Takaya Watanabe , Shinji Kawai , Shinichirou Hirayama
发明人： Takaya Watanabe , Shinji Kawai , Shinichirou Hirayama
IPC分类号： F16J1514
CPC分类号： F02F1/24 , Y10T403/1616 , Y10T403/1624 , Y10T403/52
摘要： Provided is a structure for joining a first part (e.g., a part constituted by a cylinder head and a front cover of an automotive internal combustion engine) having a pair of first and second internal joining surfaces meeting at right angles and a second part (e.g., a part constituted by a cam bracket of the engine) having a pair of first and second external joining surfaces meeting at right angles in such a manner that the first and second internal joining surfaces are respectively joined with the first and second external joining surfaces by interposing therebetween sealant for thereby providing a seal between the first internal joining surface and the first external joining surface and between the second internal joining surface and the second external joining surface. A pair of depressions are provided to the first external joining surface. A pair of projections are provided to the first internal joining surface for insertion into the depressions and thereby positioning the second part relative to the first part. A pair of slanted guide grooves are provided to inner circumferential surfaces of the depressions for guiding insertion of the projections into the depressions, respectively. Each of the guide grooves is disposed between each of the depressions and an edge at which the first and second external joining surfaces meet, and formed so as to expand each of the depressions increasingly toward an open end of each of the depressions.
摘要翻译：提供了一种用于连接第一部分（例如，由汽缸盖构成的部件和汽车内燃机的前盖）的结构，其具有一对直角相交的第一和第二内部接合表面和第二部分（例如，，由发动机的凸轮支架构成的部件）具有一对第一和第二外部接合表面，第一和第二外部接合表面以直角相交，使得第一和第二内部接合表面分别与第一和第二外部接合表面接合，在其间插入密封剂，从而在第一内部接合表面和第一外部接合表面之间以及第二内部接合表面和第二外部接合表面之间提供密封。一对凹陷被提供到第一外部接合表面。一对突起设置到第一内部接合表面以插入凹部中，从而相对于第一部分定位第二部分。在凹部的内周面分别设置有一对倾斜导向槽，用于引导突起插入凹部。每个引导槽设置在每个凹部之间以及第一和第二外部接合表面相交的边缘处，并且形成为使每个凹陷逐渐朝向每个凹部的开口端膨胀。

4. 发明授权

US4623853A Surface acoustic wave dispersive delay lines having a laser irridated focus area for eliminating undesired saw concentrations 失效
标题翻译：表面声波色散延迟线具有用于消除不期望的锯峰浓度的激光冲洗焦点区域
公开(公告)号：US4623853A
公开(公告)日：1986-11-18
申请号：US574552
申请日：1984-01-27
申请人： Takaya Watanabe , Toshihiko Kitano
发明人： Takaya Watanabe , Toshihiko Kitano
IPC分类号： H03H9/42 , H03H3/08 , H03H9/44
CPC分类号： H03H9/44
摘要： In a surface acoustic wave dispersive delay line of the type comprising a substrate made of piezoelectric material along which surface acoustic wave propagates, an input transducer formed on the substrate for producing the surface acoustic wave in response to an input electric signal, a first reflector including a plurality of reflection gatings formed at different spacings on the substrate for reflecting the surface acoustic wave from the input transducer, a second reflector including a plurality of reflection gratings formed at different spacings on the substrate for reflecting the surface acoustic wave reflected by the first reflector, an output transducer for converting the surface acoustic wave reflected by the second reflector into an electric signal, there is provided a device for eliminating concentration of the surface acoustic wave formed by the first and second reflectors. The concentration eliminating device comprises a coating of a conductive composition or a silicon rubber applied on a focus at which the surface wave concentrates or is formed by irradiating the focus with a laser beam.
摘要翻译：在包括由声表面波传播的压电材料制成的基板的类型的表面声波分散延迟线中，形成在基板上的输入换能器，用于响应于输入电信号产生表面声波，第一反射器包括在基板上以不同间隔形成的多个反射门控，用于反射来自输入换能器的表面声波;第二反射器，包括在基板上以不同间隔形成的多个反射光栅，用于反射由第一反射器反射的表面声波，用于将由第二反射器反射的表面声波转换为电信号的输出换能器，提供了用于消除由第一和第二反射器形成的表面声波的浓度的装置。浓度消除装置包括涂覆在聚焦上的导电组合物或硅橡胶的涂层，通过用激光束照射聚焦，表面波集中或形成。

5. 发明授权

US4343536A Electro-optic light deflector 失效
标题翻译：电光偏转器
公开(公告)号：US4343536A
公开(公告)日：1982-08-10
申请号：US149274
申请日：1980-05-12
申请人： Takaya Watanabe , Teruo Matsuba
发明人： Takaya Watanabe , Teruo Matsuba
IPC分类号： G02F1/00 , G02F1/29 , G02F1/295 , G02B5/14
CPC分类号： G02F1/0018 , G02F1/29 , G02F1/2955
摘要： An electro-optic material has at least a pair of confronting elongated electrodes formed on at least one surface thereof. Preferably, each of the electrodes has a plurality of elongated, spaced parallel fingers which interleave with each other (sometimes called "interdigital electrodes"). When a high-frequency signal is applied across the electrodes, the refractive index changes in a linear or nonlinear manner within a layer of the body of the electro-optic material which is near the electrodes. The amount of the index change may be varied by a proper selection of materials, signals and geometrical material configuration.
摘要翻译：电光材料在至少一个表面上形成有至少一对相对的细长电极。优选地，每个电极具有彼此交错（有时称为“叉指电极”）的多个细长间隔开的平行指状物。当跨越电极施加高频信号时，在电极附近的电光材料的主体的层内，折射率以线性或非线性方式变化。指数变化的量可以通过材料，信号和几何材料配置的适当选择来改变。

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