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公开(公告)号：US5130522A
公开(公告)日：1992-07-14
申请号：US568555
申请日：1990-08-16
IPC分类号： B42D25/23 , B42D25/305 , G06K19/07 , G07F7/08 , H03H9/145
CPC分类号： G07B15/063 , G06K19/0723
摘要： An ID card includes an electric wave receiver for receiving an electric wave from a main station, a modulator for modulating a received signal in accordance with an ID number, and an electric wave transmitter for transmitting a modulated electric wave signal to the main station. The main station identifies the ID card on the basis of the modulated electric wave signal. The ID card further includes a surface acoustic wave exciting device for coupling the electric wave receiver and the electric wave transmitter through surface acoustic wave on a piezoelectric substrate by means of the modulator and a circuit including a terminating device and a switching element and connected in parallel with the surface acoustic wave exciting device. The switching element is controlled to be turned on and off in accordance with the ID number to control the coupling between the electric wave receiver and the electric wave transmitter.
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2.发明授权Elastic boundary wave substrate and elastic boundary wave functional element using the substrate 有权弹性边界波基板和弹性边界波功能元件采用基板公开(公告)号：US08508101B2
公开(公告)日：2013-08-13
申请号：US12601687
申请日：2008-05-28
申请人： Kazuhiko Yamanouchi , Yusuke Satoh
发明人： Kazuhiko Yamanouchi , Yusuke Satoh
IPC分类号： H01L41/04
CPC分类号： H03H9/0222 , H03H9/02102 , H03H9/02559
摘要： The structure of the patent is a substrate wherein a metal electrode, a dielectric thin film, and a further dielectric thin film are adhered onto a piezoelectric substrate. A substrate wherein elastic wave energy is confined in the piezoelectric substrate can be obtained. In particular, when a SiO2 thin film and an AlN thin film are used as thin films 4 and 5, respectively, a substrate excellent in an electromechanical coupling coefficient (k2) and a temperature characteristic of frequency can be yielded by making the film thicknesses of electrodes 2 and 3 and those of the thin films 4 and 5 into optimal values.
摘要翻译： 该专利的结构是将金属电极，电介质薄膜和另外的电介质薄膜粘附到压电基板上的基板。 可以获得其中弹性波能量被限制在压电基板中的基板。 特别地，当分别使用SiO 2薄膜和AlN薄膜作为薄膜4和5时，可以通过使薄膜4的薄膜厚度达到机电耦合系数（k2）和频率的温度特性而优异的基板 电极2和3以及薄膜4和5的最佳值。
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3.发明授权公开(公告)号：US07054355B2
公开(公告)日：2006-05-30
申请号：US09826626
申请日：2001-04-05
IPC分类号： H04B1/707
CPC分类号： H04B1/7077 , H04B1/70712 , H04B1/7093 , H04B2201/70707
摘要： In a spread spectrum communication using a long spreading code, a spread spectrum signal processing apparatus is provided, which is suitable for performing communication by using a correlator having a size mountable on a portable equipment. The spread spectrum signal processing apparatus has a correlator for correlating between a spread spectrum signal and a given reference signal, an A/D converter for converting a correlation signal into a digital signal, a memory for storing the digital signal from the AD converter as digital data, a signal processor for summing digital data corresponding to each of divided codes C1–C16 and for outputting a result of summation, and a control unit for controlling to apply each of the divided codes C1–C16 in this order repeatedly as a reference signal to the correlator. The signal processor begins a summing process by making reference to a timing signal from the control unit.
摘要翻译： 在使用长扩展码的扩展频谱通信中，提供了一种扩展频谱信号处理装置，其适于通过使用具有可安装在便携式设备上的尺寸的相关器进行通信。 扩频信号处理装置具有用于将扩频信号和给定参考信号相关的相关器，将相关信号转换为数字信号的A / D转换器，将来自AD转换器的数字信号存储为数字信号的存储器 数据，用于对应于每个划分代码C 1 -C 16的数字数据的信号处理器，并用于输出求和的结果;以及控制单元，用于控制应用 每个分割代码C 1 -C 16以此顺序重复作为到相关器的参考信号。 信号处理器通过参考来自控制单元的定时信号来开始求和处理。
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4.发明授权
公开(公告)号：US5438306A
公开(公告)日：1995-08-01
申请号：US85121
申请日：1993-07-01
CPC分类号： H03H9/6426 , H03H9/14505
摘要： A surface acoustic wave filter device includes a substrate which includes quartz or the like piezoelectric material having a small temperature coefficient. The substrate has a surface which is formed with interdigital-type unidirectional transducers on input and output sides, each having a positive electrode and a negative electrode. The positive electrodes and the negative electrodes of each of the input side and output side transducers have electrode fingers which are arranged so as to transduce a harmonic wave of a selected order which is higher relative to a fundamental surface acoustic wave.
摘要翻译： 表面声波滤波器装置包括具有温度系数小的石英等压电材料的基板。 基板具有在输入侧和输出侧形成有叉指型单向换能器的表面，每个具有正极和负极。 输入侧和输出侧换能器中的每一个的正电极和负电极具有电极指，其布置成转换相对于基本声波较高的所选次序的谐波。
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公开(公告)号：US20070081145A1
公开(公告)日：2007-04-12
申请号：US11636292
申请日：2006-12-07
IPC分类号： G01B9/00
CPC分类号： G02B21/362
摘要： An electronic imaging apparatus includes a connecting section connected to an optical apparatus; an optical element having a preset transmittance with respect to light in a preset wavelength region, incident from the optical apparatus; and an electronic image sensor receiving the light transmitted through the optical element.
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6.发明授权Surface acoustic wave transducer using NSPUDT property substrate and surface acoustic wave filter using the transducer 失效表面声波传感器采用NSPUDT性能基板和声表面波滤波器使用传感器公开(公告)号：US06373353B1
公开(公告)日：2002-04-16
申请号：US08860606
申请日：1997-11-18
IPC分类号： H03H964
CPC分类号： H03H9/14547 , H03H9/02716 , H03H9/14505 , H03H9/14517 , H03H9/14552 , H03H9/14594
摘要： In order to provide a transducer suitable for an anisotropic substrate having the NSPUDT property, on the anisotropic piezoelectric substrate being cut to have the NSPUDT property, there is formed a transducer structure having an exciting electrode structure (21) and a reflector structure (22). When &lgr; is a wavelength of a fundamental surface acoustic wave, said exciting electrode structure (21) includes a positive electrode (23) having a plurality of electrode fingers arranged at a pitch &lgr; and a negative electrode (24) having at least one electrode finger interdigitally arranged between said electrode fingers of the positive electrode with a center distance of &lgr;/2. The reflector transducer (22) includes a plurality of electrode fingers arranged with a center distance of &lgr;/2, and a distance Lg between said exciting electrode structure (21) and the reflector structure (22) is set to Lg=(2n+1)&lgr;/4 (n being a positive integer).
摘要翻译： 为了提供适合于具有NSPUDT特性的各向异性基板的换能器，在被切割为具有NSPUDT特性的各向异性压电基片上形成具有激发电极结构（21）和反射器结构（22）的换能器结构， 。 当羔羊是基本表面声波的波长时，所述激发电极结构（21）包括具有以匝数排列的多个电极指的正极（23）和具有至少一个电极指的负极（24） 在正极的所述电极指之间交叉布置，中心距离为lambd / 2。 反射器换能器（22）包括布置有中心距离lambd / 2的多个电极指，并且所述激励电极结构（21）和反射器结构（22）之间的距离Lg被设置为Lg =（2n + 1 ）lambd / 4（n为正整数）。
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公开(公告)号：US06198197B1
公开(公告)日：2001-03-06
申请号：US09499467
申请日：2000-02-07
IPC分类号： H03H925
CPC分类号： H03H9/64 , H03F13/00 , H03F2200/372 , H03H9/02566 , H03H9/02574
摘要： A surface acoustic wave functional element is provided that includes a piezoelectric substrate or a multilayer piezoelectric substrate having a large electromechanical coupling coefficient. Semiconductor layers are formed on the piezoelectric substrate. The semiconductor layers include an active layer and a buffer layer. The buffer layer is formed of a structure that has a lattice constant that is the same as or similar to that of the active layer. In addition, input and output electrodes are formed on both sides of the semiconductor layers. The surface acoustic wave functional element attains a large amplification gain at low voltage, and can be used as part of a transmitting/receiving circuit in a high frequency portion of a mobile communication device.
摘要翻译： 提供了一种表面声波功能元件，其包括具有大机电耦合系数的压电基片或多层压电基片。 半导体层形成在压电基板上。 半导体层包括有源层和缓冲层。 缓冲层由具有与有源层相同或类似的晶格常数的结构形成。 另外，在半导体层的两侧形成有输入输出电极。 表面声波功能元件在低电压下获得大的放大增益，并且可以用作移动通信设备的高频部分中的发送/接收电路的一部分。
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公开(公告)号：US3936679A
公开(公告)日：1976-02-03
申请号：US500697
申请日：1974-08-26
CPC分类号： H03H9/14517
摘要： An interdigital transducer used in an elastic surface wave device and including a pair of electrodes each having a common electrode and a plurality of electrode fingers connected to the common electrode, the overlap lengths of electrode fingers being uniform throughout the transducer. Floating electrodes, each having two parallel conductors connected together at one end, are disposed between the interdigital electrode fingers of the paired electrodes to weight the excitation electric field strength.This invention relates to an elastic surface wave transducer.BACKGROUND OF THE INVENTIONAn elastic surface wave device (also referred to as an acoustic surface wave device) used in the VHF band and UHF band as a filter or delay line already known to those skilled in the art. An elastic surface wave device has transmitting and receiving interdigital transducers disposed on a piezoelectric substrate. These transducers are used to convert electrical signals into elastic surface waves or vice versa.A known transducer used in an elastic surface wave device is of the uniform overlap length interdigital type comprising first and second electrodes disposed on a substrate of piezoelectric material, each of the first and second electrodes having a common electrode connected to an external terminal and a plurality of electrode fingers connected to the common electrode, the overlap lengths of the electrode fingers of the first and second electrodes being uniform throughout the transducer.However, the above-mentioned prior art uniform overlap length interdigital transducer has unsatisfactory frequency characteristics. Further, such transducer has a passband width bearing a substantially inverse proportion to the number of electrode fingers.In Proc. IEEE, Vol. 59, No. 3, p.393, March (1971) is set forth a weighting transducer with a so-called "apodized electrode" arrangement for improving the frequency response of the transducer. With this apodized type weighting transducer, the overlap lengths of the electrode fingers are made to vary in proportion to a weighting function, causing the widths of excited elastic surface wave beams to be weighted in proportion to the weighting function. Though a weighting function with respect to the frequency transmitting property of an ideal filter is sin x/x, a practically used function is, for example ##EQU1## APPROXIMATING THE FUNCTION SIN X /X.When the apodized transducers are used as input and output transducers, it is impossible to obtain the product property of the transfer functions of both transducers. For a prominent guaranteed attenuation in the stop band, however, the product property should be attained. Following is the reason why apodised type weighting transducers used as input and output transducers can not provide a desired product of transfer functions. The electrode fingers of the output transducer overlapping each other over a small length can not fully pick up an elastic surface wave having a larger beam width from the input transducer, failing to produce an output signal proportional to the weight of the beam width.To obtain, therefore, the product of transfer functions, an apodized type weighting transducer is combined with a uniform overlap length type transducer. In this case, the electrodes of the apodized type weighting transducer should be made more precisely than in the case with two weighting transducers in order to attain a prominent guaranteed attenuation in the stop band. However, this is difficult to realize.It is accordingly an object of this invention to provide a weighting transducer, which, combined with any other type of transducer, can easily realize the product property of the transfer functions of both transducers.Another object of the invention is to provide a uniform overlap length interdigital transducer with an improved frequency response.SUMMARY OF THE INVENTIONA uniform overlap length type interdigital weighting transducer of this invention is characterized in that a plurality of floating electrodes each having a pair of parallel conductors connected together at one end are disposed on a piezoelectric substrate between the adjacent interdigital electrode fingers of the first and second electrodes. The parallel conductors preferably extend along the entire overlap length of the interdigital electrode fingers of the first and second electrodes. A plurality of the above-mentioned floating electrodes arranged between pairs of interdigital electrode fingers in numbers progressively increasing from the center of the transducer to both ends thereof along the propagation axis of the elastic surface wave can weight the strength of an excitation electric field in proportion to a weighting function.When combined with any other type of transducer, the weighting transducer of this invention which has the electrode fingers overlapped by each other in the uniform length throughout the transducer, can easily realize the product property of the transfer functions of both transducers.Further, the rejection of the side lobe of the weighting transducer of this invention can be easily improved to a larger extent than 10 dB as compared with the ordinary uniform overlap length type transducer.
摘要翻译： 一种用于弹性表面波装置并且包括一对电极的叉指换能器，每对电极具有公共电极和连接到公共电极的多个电极指，电极指的重叠长度在整个换能器中是均匀的。 每个具有两端的两个平行导体连接在一起的浮动电极被设置在一对电极的叉指间电极指之间，以增加激励电场强度。
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公开(公告)号：US07289199B2
公开(公告)日：2007-10-30
申请号：US11636292
申请日：2006-12-07
CPC分类号： G02B21/362
摘要： An electronic imaging apparatus includes a connecting section connected to an optical apparatus; an optical element having a preset transmittance with respect to light in a preset wavelength region, incident from the optical apparatus; and an electronic image sensor receiving the light transmitted through the optical element.
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公开(公告)号：US07164471B2
公开(公告)日：2007-01-16
申请号：US10697021
申请日：2003-10-31
CPC分类号： G02B21/362
摘要： An electronic imaging apparatus includes a connecting section connected to an optical apparatus; an optical element having a preset transmittance with respect to light in a preset wavelength region, incident from the optical apparatus; and an electronic image sensor receiving the light transmitted through the optical element.
摘要翻译： 电子成像设备包括连接到光学设备的连接部分; 光学元件，其具有相对于从所述光学装置入射的预设波长区域中的光的预设透射率; 以及接收透过光学元件的光的电子图像传感器。
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