-
公开(公告)号：US5670921A
公开(公告)日：1997-09-23
申请号：US470699
申请日：1995-06-06
申请人： Yoshiko Tera , Kouji Morishima , Atsushi Sakai
发明人： Yoshiko Tera , Kouji Morishima , Atsushi Sakai
CPC分类号： H03H9/643 , H03H9/02771 , H03H9/14547 , H03H9/14567 , H03H9/1457 , H03H9/6426
摘要： To obtain a surface acoustic wave device which can be produced with ease at a low cost and can be reduced in size without causing deterioration of characteristics, a surface acoustic wave device having input and output transducers arranged alternately on the surface of a substrate for propagating a surface acoustic wave includes metal patterns provided outside the transducers along the extension line of the propagation path of the surface acoustic wave and having at least one surface inclined at an angle .theta. (5.degree.
摘要翻译： 为了获得可以以低成本容易地制造并且可以减小尺寸而不会导致特性劣化的表面声波装置，具有输入和输出换能器的表面声波装置交替布置在基板的表面上，用于传播 表面声波包括设置在换能器外部的金属图案，沿着声表面波的传播路径的延伸线并具有至少一个以角度θ倾斜的表面（5°<85°或-85°< 5°）相对于声表面波的传播方向。
-
公开(公告)号：US5565825A
公开(公告)日：1996-10-15
申请号：US470700
申请日：1995-06-06
申请人： Yoshiko Tera , Kouji Morishima , Atsushi Sakai
发明人： Yoshiko Tera , Kouji Morishima , Atsushi Sakai
CPC分类号： H03H9/643 , H03H9/02771 , H03H9/14547 , H03H9/14567 , H03H9/1457 , H03H9/6426
摘要： A surface acoustic wave device for propagating a surface acoustic wave having input and output transducers and a multistrip coupler formed on the surface of a substrate. The input and output transducers each have two opposite electrodes having a plurality of electrode fingers extending toward their opposites and meshing with the electrode fingers of their opposites. The multistrip coupler has strip lines of a configuration wherein portions of at least some of the coupler strip lines are more widely spaced from adjacent patterns than other portions of the coupler strip lines. The width of these more widely spaced portions of at least one of the coupler strip lines which are more widely spaced from adjacent patterns is made larger than the width of the other portions of the at least one coupler strip line to compensate for the thinning effect of the lithography process. In one preferred embodiment, the portion of the at least one coupler strip line whose width is made larger is positioned so that it is not adjacent to the pattern of the input or output transducers.
摘要翻译： 一种用于传播具有输入和输出换能器的声表面波的表面声波装置和形成在基板表面上的多带耦合器。 输入和输出换能器各自具有两个相对的电极，其具有朝向它们的对立面延伸并与其对立面的电极指相啮合的多个电极指。 所述多段耦合器具有这样的配置的带状线，其中至少一些耦合器带状线的部分相对于相邻的图案与耦合器带状线的其它部分间隔更宽。 与相邻图案间隔更宽的耦合器带状线中至少一个的这些更宽间隔的部分的宽度被制成大于至少一个耦合器带状线的其它部分的宽度，以补偿 光刻工艺。 在一个优选实施例中，使得其宽度变大的至少一个耦合器带状线的部分被定位成使其不与输入或输出换能器的图案相邻。
-
公开(公告)号：US5396199A
公开(公告)日：1995-03-07
申请号：US112474
申请日：1993-08-27
申请人： Yoshiko Tera , Kouji Morishima , Atsushi Sakai
发明人： Yoshiko Tera , Kouji Morishima , Atsushi Sakai
CPC分类号： H03H9/643 , H03H9/02771 , H03H9/14547 , H03H9/14567 , H03H9/1457 , H03H9/6426
摘要： To obtain a surface acoustic wave device which can be produced with ease at a low cost and can be reduced in size without causing deterioration of characteristics, a surface acoustic wave device having input and output transducers arranged alternately on the surface of a substrate for propagating a surface acoustic wave includes metal patterns provided outside the transducers along the extension line of the propagation path of the surface acoustic wave and having at least one surface inclined at an angle .theta. (5.degree.
摘要翻译： 为了获得可以以低成本容易地制造并且可以减小尺寸而不会导致特性劣化的表面声波装置，具有输入和输出换能器的表面声波装置交替布置在基板的表面上，用于传播 表面声波包括设置在换能器外部的金属图案，沿着声表面波的传播路径的延伸线并具有至少一个以角度θ倾斜的表面（5°<85°或-85°< 5°）相对于声表面波的传播方向。
-
公开(公告)号：US4764701A
公开(公告)日：1988-08-16
申请号：US947655
申请日：1986-12-30
申请人： Michael J. Garbacz , Kai Hansen
发明人： Michael J. Garbacz , Kai Hansen
CPC分类号： H03H9/72 , H03H9/02779 , H03H9/14567 , H04N7/167 , H03H9/1452 , H03H9/14547 , H03H9/1455 , H03H9/14552
摘要： A multichannel surface acoustic wave encoder/decoder having a common electrical input is designed so that the insertion losses of the channels differ despite the apparent design constraint of closely matched channel output impedances. The input transducing device or SAW transmitter is divided into individual transducers (or into subtransducers) having different numbers of finger overlaps, thus achieving different acoustic output levels which in turn result in different insertion losses for different channels. The finger spacing of the SAW transmitters can differ between the respective input transducers or subtransducers so as to optimize the center frequency of each channel.
摘要翻译： 设计具有公共电输入的多声道表面声波编码器/解码器，尽管存在紧密匹配的通道输出阻抗的明显设计约束，但是通道的插入损耗也是相同的。 输入转换装置或SAW发射器被分成具有不同数量的手指重叠的单个换能器（或者变换器），从而实现不同的声输出电平，这又导致不同通道的插入损耗不同。 SAW发射器的手指间距可以在相应的输入换能器或副传感器之间不同，以便优化每个通道的中心频率。
-
公开(公告)号：US4365220A
公开(公告)日：1982-12-21
申请号：US245748
申请日：1981-03-20
申请人： Mitsutaka Hikita
发明人： Mitsutaka Hikita
CPC分类号： H03H9/643 , H03H9/02771 , H03H9/02881 , H03H9/14517 , H03H9/14567 , H03H9/14547
摘要： Stripes of a transducer or a reflector in a surface acoustic wave device are arranged such that the distribution of effective lengths of interdigital electrodes follows a function of impulse response in the direction of propagation of an acoustic wave and a total number of stripes in the direction of propagation is equal for each section in the direction normal to the direction of propagation, in order to attain a desired frequency response without sacrificing a transfer efficiency.
摘要翻译： 表面声波装置中的换能器或反射器的条纹被布置成使得叉指电极的有效长度的分布遵循在声波的传播方向上的脉冲响应的方向和沿着 在与传播方向垂直的方向上的每个部分的传播相等，以便在不牺牲传送效率的情况下获得期望的频率响应。
-
公开(公告)号：US4203082A
公开(公告)日：1980-05-13
申请号：US911082
申请日：1978-05-31
CPC分类号： H03H9/1455 , H03H9/0038 , H03H9/1452 , H03H9/14547 , H03H9/14558 , H03H9/14564 , H03H9/14567 , H03H9/14594 , H03H9/6433 , H03H9/14552
摘要： To obtain low insertion loss and low TTE level, a first central transducer, a second transducer and a third transducer are disposed on one surface of a piezoelectric substrate in such a manner that the second and the third transducers are in the direction of propagation (X-direction) of surface acoustic waves launched by the first transducer and the distance between center lines of the first and the second transducers and also the distance between the center lines of the first and the third transducers vary along the Y-direction perpendicular to the X-direction.
摘要翻译： 为了获得低插入损耗和低TTE电平，第一中心换能器，第二换能器和第三换能器以这样的方式设置在压电基板的一个表面上，使得第二和第三换能器处于传播方向（X 由第一换能器发射的表面声波和第一和第二换能器的中心线之间的距离以及第一和第三换能器的中心线之间的距离沿垂直于X的Y方向变化 -方向。
-
37.发明授权
公开(公告)号：US4081769A
公开(公告)日：1978-03-28
申请号：US723008
申请日：1976-09-13
CPC分类号： H03H9/14547 , H03H9/14558 , H03H9/14564 , H03H9/14567 , H03H9/02637
摘要： Acoustic surface wave resonator device having two sets of reflector arrays on a piezoelectric substrate with structurally modified coupling transducers interposed therebetween, wherein the transducers are coupled to the standing wave resonance in the resonance cavity but are respectively decoupled from the surface wave launched by the other transducer, thereby suppressing direct coupled response without materially affecting the resonance response. In a typical embodiment, a pair of interdigital transducers are disposed between two sets of reflector arrays on a piezoelectric substrate, with the fingers of the respective transducers including intermediate off-set portions thereof. Specifically, the intermediate off-set portion in each interdigital finger extends over a distance .lambda./4, with the space between successive fingers in a transducer being .lambda./2. The reflector arrays are spaced to set up a standing wave at resonance, and the transducers are so located to dispose the center line of each finger on the peak of the standing wave. The off-set portions in the fingers of the respective transducers extend in opposite directions so as to cause the wavefront of a wave launched by one transducer to have a 180.degree. phase shift along the length of the finger of the other transducer. The net change in the finger due to this wave is zero such that no signal is generated, thus suppressing the transducer response.
摘要翻译： 声表面波谐振器装置在压电基片上具有两组反射器阵列，其间插入有结构上改进的耦合换能器，其中换能器耦合到共振腔中的驻波共振，但分别与由另一换能器发射的表面波分离 从而抑制直接耦合响应而不会对谐振响应产生重大影响。 在典型的实施例中，一对叉指换能器设置在压电基板上的两组反射器阵列之间，各个换能器的指状物包括其中间偏移部分。 具体地，每个叉指中的中间偏移部分延伸超过λ/ 4的距离，换能器中连续指状物之间的空间为λ/ 2。 反射器阵列间隔开以在共振时建立驻波，并且换能器被定位成将每个手指的中心线布置在驻波的峰上。 各个换能器的手指中的偏移部分沿相反的方向延伸，以使由一个换能器发射的波的波前沿着另一个换能器的手指的长度具有180°的相移。 由于这个波，手指的净变化为零，使得不产生信号，从而抑制换能器响应。
-
-
-
-
-
-
搜索结果
37 条记录 (耗时 0.015 秒)
