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    • 3. 发明授权
    • Thin film piezoelectric element
    • 薄膜压电元件
    • US06396200B2
    • 2002-05-28
    • US09381167
    • 1999-09-16
    • Koichiro MisuTsutomu NagatsukaShusou Wadaka
    • Koichiro MisuTsutomu NagatsukaShusou Wadaka
    • H01L4108
    • H03H9/174H03H9/02133H03H9/177H03H9/562H03H9/564
    • A film bulk acoustic wave device, comprising: a substrate; a bottom electrode formed on one surface of the substrate; a piezoelectric film formed on the bottom electrode; and a first top electrode formed on the piezoelectric film, further comprises a second top electrode having a larger mass load than the first top electrode, and formed on the first top electrode on the piezoelectric film when viewed from the center of the first top electrode, wherein the piezoelectric film has a high-band-cut-off-type dispersion characteristic. The cut-off frequency of a second top electrode portion piezoelectric film having a large mass load can be lower than the cut-off frequency of a first top electrode portion piezoelectric film, to thereby trap the energy of the acoustic wave in a region of the first top electrode portion side, so that good performance may be feasible.
    • 一种薄膜体声波装置,包括:基板; 形成在所述基板的一个表面上的底部电极; 形成在底部电极上的压电膜; 以及形成在所述压电膜上的第一顶部电极,还包括具有比所述第一顶部电极大的质量负载的第二顶部电极,并且当从所述第一顶部电极的中心观察时,形成在所述压电膜上的所述第一顶部电极上, 其中压电薄膜具有高截止型色散特性。具有大质量负载的第二顶部电极部分压电薄膜的截止频率可以低于第一顶部电极的截止频率 从而将声波的能量捕获在第一顶部电极部分侧的区域中,使得良好的性能可能是可行的。
    • 6. 发明授权
    • Inspection apparatus
    • 检验仪器
    • US5272923A
    • 1993-12-28
    • US691063
    • 1991-04-23
    • Shusou WadakaTsutomu NagatsukaKoichiro MisuMitsuhiro Koike
    • Shusou WadakaTsutomu NagatsukaKoichiro MisuMitsuhiro Koike
    • G01N29/11G01N29/34G01N29/40G01N29/42G01N29/46G01N29/50G01N29/22
    • G01N29/42G01N29/11G01N29/341G01N29/40G01N29/46G01N29/50G01N2291/044
    • An inspection apparatus utilizing a pulse compression technique is described which comprises a signal generator, a transmission/reception probe; first and second correlators and an adder. The signal generator generates a composite transmission signal consisting of signals Sap(t), Saq(t), Sbp(t) and Sbq(t) respectively based on a basic unit signal ga(t) and a sequence {p}, the signal ga(t) and a sequence {q}, a basic unit signal gb(t) and the sequence {p}, and the signal gb(t) and the sequence {q}, to the probe to transmit the composite transmission signal to a target. The first correlator performs a correlation operation of echo signals Rap(t), Raq(t), Rbp(t) and Rbq(t) corresponding to the signal Sap(t), Saq(t) and Sbq(t) by utilizing reference signals Ua(t) and Ub(t) based on the sequences to provide results Caap(t), Caaq(t), Cbbp(t) and Cbbq(t). The second correlator performs a correlation operation of the results Caap(t), Caaq(t) Cbbp(t) and Cbbq(t) by utilizing the sequences {p} and {q} to provide compressed pulses Caapp(t), Caaqq(t), Cbbpp(t) and Cbbqq(t). These pulses are summed up at the adder to provide a composite compressed pulse C having the large amplitude main lobe and small amplitude side lobes.
    • 描述了利用脉冲压缩技术的检查装置,其包括信号发生器,发送/接收探头, 第一和第二相关器和加法器。 信号发生器基于基本单位信号ga(t)和序列{p}分别产生由信号Sap(t),Saq(t),Sbp(t)和Sbq(t)组成的复合传输信号, ga(t)和序列{q},基本单位信号gb(t)和序列{p}以及信号gb(t)和序列{q}到探头以将复合传输信号发送到 一个目标。 第一相关器通过利用参考信号对与信号Sap(t),Saq(t)和Sbq(t)相对应的回波信号Rap(t),Raq(t),Rbp(t)和Rbq(t)进行相关运算 基于序列提供信号Ua(t)和Ub(t),以提供结果Caap(t),Caaq(t),Cbbp(t)和Cbbq(t)。 第二相关器通过利用序列{p}和{q}来执行结果Caap(t),Caaq(t)Cbbp(t)和Cbbq(t)的相关运算,以提供压缩脉冲Caapp(t),Caaqq t),Cbbpp(t)和Cbbqq(t)。 这些脉冲在加法器处相加,以提供具有大振幅主瓣和小振幅旁瓣的复合压缩脉冲C.
    • 8. 发明授权
    • Apparatus and method for detecting a measurable quantity of an object
    • 用于检测物体的可测量的装置和方法
    • US5942688A
    • 1999-08-24
    • US937244
    • 1997-09-08
    • Tomonori KimuraShusou WadakaKoichiro MisuTsutomu NagatsukaMitsuhiro Koike
    • Tomonori KimuraShusou WadakaKoichiro MisuTsutomu NagatsukaMitsuhiro Koike
    • G01B15/00G01B17/00G01B17/06G01B21/00G01N29/00G01N29/34G01N29/42G01N29/44G01S7/524G01S15/10
    • G01N29/348G01N29/42G01N2291/011G01N2291/012G01N2291/02854G01N2291/044
    • A detecting device for detecting a physical quantity of an object, which includes a transmission signals generating device for generating first and second transmission signals of different frequencies, an ultrasonic wave transmission device that is excited by the first and the second transmission signal, for transmitting ultrasonic pulses corresponding to the first and the second transmission signal to an object, and a signal processing device for carrying out a signal processing process on the first and the second echo. The signal processing process is such that it detects phases of the first and second echo corresponding to the first and second transmission signal, which are received by the ultrasonic wave receiving device. An indeterminacy integer times as large as 2.pi. of the phase of each of the first and second echo is determined on the basis of the information of the amplitudes of the first or the second echo, and a distance from the ultrasonic wave transmission device through an object to the ultrasonic wave receiving device along an ultrasonic wave propagating path is detected on the basis of the determined phase of the first or second echo.
    • 一种用于检测物体的物理量的检测装置,包括用于产生不同频率的第一和第二传输信号的传输信号产生装置,由第一和第二传输信号激发的超声波传输装置,用于发射超声波 对应于第一和第二传输信号的脉冲的对象;以及用于对第一和第二回波进行信号处理处理的信号处理装置。 信号处理处理使得它检测由超声波接收装置接收的对应于第一和第二传输信号的第一和第二回波的相位。 基于第一或第二回波的振幅的信息以及与超声波发送装置的距离通过第一回波和第二回波的距离的信息来确定第一和第二回波中的每一个的相位的2π的整数倍的不确定度 基于确定的第一或第二回波的相位来检测沿着超声波传播路径对超声波接收装置的物体。
    • 10. 发明授权
    • Filter bank
    • 过滤器库
    • US4954793A
    • 1990-09-04
    • US214521
    • 1988-07-01
    • Koichiro MisuShusou WadakaTsutomu Nagatsuka
    • Koichiro MisuShusou WadakaTsutomu Nagatsuka
    • H03H9/64H03H3/08H03H9/72
    • H03H9/72H03H2240/00
    • A filter bank constituted in such a manner that an interdigital transducer on the input side of a plurality of each of surface acoustic wave filters having different pass bands is used as a shunt element and the shunt element is connected to a series element composed of reactance elements to form a ladder-type circuit, and a circuit composed of an inductor and a capacitor connected in parallel with each other is used as one part of the series element to form a pole near the cut-off frequency, to increase an amount of attenuation of a T-type circuit near the cut-off frequency, and to largely reduce transmitted electric power of spurious components even in a surface acoustic wave filter in a section near a signal source.
    • 一种滤波器组,其特征在于,使用具有不同通带的多个声表面波滤波器的输入侧的叉指式换能器作为分路元件,并且分路元件与由电抗元件构成的串联元件 形成梯型电路,并且将由电感器和彼此并联的电容器组成的电路用作串联元件的一部分,以在截止频率附近形成极点,以增加衰减量 的截止频率附近的T型电路,并且即使在靠近信号源的部分中的表面声波滤波器中也能大大降低杂散成分的透射功率。