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    • 51. 发明申请
    • ELASTIC WAVE FILTER DEVICE
    • 弹性波滤波器
    • US20110156841A1
    • 2011-06-30
    • US13044647
    • 2011-03-10
    • Yuichi TAKAMINE
    • Yuichi TAKAMINE
    • H03H9/15
    • H03H9/0038H03H9/14535
    • A 5-IDT longitudinally coupled resonator type elastic wave filter device includes a narrow-pitch electrode finger portion arranged to increase the steepness of the filter characteristic includes first to fifth IDTs. When the total number of electrode fingers in a first area and a fourth area is Nx and the total number of electrode fingers in a second area and a third area is Ny, an average period of electrode fingers in one of the areas including larger total numbers of the electrode fingers Nx and Ny is greater than that in the area including smaller total numbers of the electrode fingers Nx and Ny. Among the first IDT electrode, the third IDT electrode, and the fifth IDT electrode, the period of electrode fingers in a portion other than the narrow-pitch electrode finger portion of the IDT electrode in the area including the larger numbers of electrode fingers is less than the period of electrode fingers in a portion other than the narrow-pitch electrode finger portion of the IDT electrode in the area including the smaller numbers of electrode fingers.
    • 5-IDT纵向耦合谐振器型弹性波滤波器装置包括设置成增加滤波器特性的陡度的窄间距电极指部分,包括第一至第五IDT。 当第一区域和第四区域中的电极指的总数为Nx,并且第二区域和第三区域中的电极指的总数为Ny时,包括较大总数的区域之一的电极指的平均周期 的电极指Nx和Ny大于包括较小的电极指Nx和Ny总数的区域。 在第一IDT电极,第三IDT电极和第五IDT电极中,包括较大数量的电极指的区域中IDT电极的窄间距电极指部分以外的部分中的电极指的周期较少 比IDT电极的窄间距电极指部分以外的部分的电极指的周期长。
    • 54. 发明授权
    • Balanced-type surface acoustic wave filter
    • 平衡型声表面波滤波器
    • US07479854B2
    • 2009-01-20
    • US11686624
    • 2007-03-15
    • Yuichi Takamine
    • Yuichi Takamine
    • H03H9/64
    • H03H9/0061H03H9/0057H03H9/14582H03H9/14588H03H9/6473
    • In a balanced-type surface acoustic wave filter, a first longitudinally coupled resonator surface acoustic wave filter unit connected to an unbalanced signal terminal is connected in a cascade arrangement to a second longitudinally coupled resonator surface acoustic wave filter unit connected to a first balanced signal terminal and a second balanced signal terminal. When the number of electrode fingers included in each of narrow pitch electrode finger portions in a center second IDT of the first longitudinally coupled resonator surface acoustic wave filter unit is defined as N1, and the number of electrode fingers included in each of narrow pitch electrode finger portions in a center fifth IDT of the second longitudinally coupled resonator surface acoustic wave filter unit is defined as N2, the numbers N1 and N2 are set to N1>N2.
    • 在平衡型表面声波滤波器中,连接到不平衡信号端子的第一纵向耦合谐振器表面声波滤波器单元以级联方式连接到连接到第一平衡信号端子的第二纵向耦合谐振器表面声波滤波器单元 和第二平衡信号端子。 当包括在第一纵向耦合谐振器表面声波滤波器单元的中心第二IDT中的每个窄间距电极指部中的电极指的数量被定义为N1时,并且包括在每个窄间距电极指中的电极指的数量 将第二纵向耦合谐振器表面声波滤波器单元的中心第五IDT的部分定义为N2,将数字N1和N2设置为N1> N2。
    • 56. 发明授权
    • Elastic wave filter device and duplexer
    • 弹性波滤波器和双工器
    • US07459997B2
    • 2008-12-02
    • US11761895
    • 2007-06-12
    • Yuichi Takamine
    • Yuichi Takamine
    • H03H9/00
    • H03H9/725H03H9/0028H03H9/0071H03H9/008H03H9/0085
    • In an elastic wave acoustic device, input ends of first to third longitudinally coupled resonator surface acoustic wave filters are connected to an unbalanced signal terminal, the output end of the first longitudinally coupled resonator surface acoustic wave filter, and a first IDT defining a first output terminal of the second longitudinally coupled resonator surface acoustic wave filter are connected to a first balanced signal terminal, the output end of the third longitudinally coupled resonator surface acoustic wave filter, and a third IDT defining a second output terminal of the second longitudinally coupled resonator surface acoustic wave filter are connected to a second balanced signal terminal, and the phase of an output signal to an input signal of the first longitudinally coupled resonator surface acoustic wave filter differs by about 180 degrees from the phase of an output signal to an input signal of the third longitudinally coupled resonator surface acoustic wave filter. Thus, the elastic wave filter device has a balanced-to-unbalanced conversion function and an impedance conversion function, and reduces an insertion loss within a passband.
    • 在弹性波声学装置中,第一至第三纵向耦合谐振器表面声波滤波器的输入端连接到不平衡信号端子,第一纵向耦合谐振器表面声波滤波器的输出端和限定第一输出端的第一IDT 第二纵向耦合谐振器表面声波滤波器的端子连接到第一平衡信号端子,第三纵向耦合谐振器表面声波滤波器的输出端和限定第二纵向耦合谐振器表面的第二输出端子的第三IDT 声波滤波器连接到第二平衡信号端子,并且输出信号相对于第一纵向耦合谐振器表面声波滤波器的输入信号的相位与输出信号的相位相差大约180度到输入信号的输入信号 第三纵向耦合谐振器表面声波滤波器。 因此,弹性波滤波器装置具有平衡到不平衡的转换功能和阻抗转换功能,并且降低通带内的插入损耗。
    • 58. 发明授权
    • Balanced SAW filter
    • 平衡SAW滤波器
    • US07378923B2
    • 2008-05-27
    • US11761939
    • 2007-06-12
    • Yuichi Takamine
    • Yuichi Takamine
    • H03H9/64
    • H03H9/14588H03H9/0038H03H9/0057
    • A 5-IDT longitudinally coupled resonator-type SAW filter has a balanced-to-unbalanced conversion function. In areas where first to fifth IDTs are adjacent to each other, each IDT includes a narrow-pitched electrode finger portion. The IDTs are configured such that one condition selected from among conditions (1) to (3) and one condition selected from among conditions (4) to (6) are satisfied when the numbers and pitches of electrode fingers in the narrow-pitched portions of the first to fifth IDTs are denoted by N1 and P1, N2a and P2a, N2b and P2b, N3 and P3, N4a and P4a, N4b and P4b, and N5 and P5, respectively: Conditions (1): When N1=N3=N5, 0.992≦P1/P3≦1.008 and P1=P5 (2): When N1=N5 N2b=N4a, 1
    • 5-IDT纵向耦合谐振器型SAW滤波器具有平衡到不平衡的转换功能。 在第一至第五IDT彼此相邻的区域中,每个IDT包括狭窄的电极指部分。 IDT被配置为当在条件(1)至(3)中选择的一个条件和从条件(4)至(6)中选择的一个条件被满足时,在电极指的窄间距部分的数量和间距 第一至第五IDT由N 1和P 1,N 2 a和P 2 a,N 2 b和P 2 b,N 3和P 3,N 4 a和P 4 a,N 4 b和P 4 b和N 5和P 5分别为:条件(1):当N 1 = N 3 = N 5时,0.992 <= P 1 / P 3 <= 1.008,P 1 = P 5(2) = N 5 N 2 b = N 4 a,1

      N 2 a或P 1 <> P 2 a。

    • 59. 发明授权
    • Balanced saw filter
    • 平衡锯式过滤器
    • US07369016B2
    • 2008-05-06
    • US11736853
    • 2007-04-18
    • Yuichi Takamine
    • Yuichi Takamine
    • H03H9/64
    • H03H9/14582H03H9/0057H03H9/0061H03H9/14588
    • In a balanced SAW filter, a second IDT and a fourth IDT of a five IDT type first longitudinally-coupled-resonator SAW filter element are connected via first and second wiring lines to a seventh IDT and a ninth IDT of a five IDT type second longitudinally-coupled-resonator SAW filter element, respectively. First, third, and fifth IDTs are connected to an unbalanced terminal. A sixth IDT and a first sub-IDT portion are connected to a first balanced terminal. A second sub-IDT portion and a tenth IDT are connected to a second balanced terminal. The IDTs are arranged such that the phase of an electrical signal transmitted through the first wiring line differs by 180 degrees from the phase of an electrical signal transmitted through the second wiring line.
    • 在平衡SAW滤波器中,五IDT型第一纵向耦合谐振器SAW滤波器元件的第二IDT和第四IDT通过第一和第二布线连接到第七IDT和第五IDT型的第五IDT 耦合谐振器SAW滤波器元件。 第一,第三和第五IDT连接到不平衡终端。 第六IDT和第一子IDT部分连接到第一平衡端子。 第二子IDT部分和第十IDT连接到第二平衡端子。 IDT被布置成使得通过第一布线的电信号的相位与通过第二布线发送的电信号的相位相差180度。
    • 60. 发明申请
    • BALANCED SAW FILTER
    • 平衡式滤波器
    • US20070188271A1
    • 2007-08-16
    • US11736853
    • 2007-04-18
    • Yuichi Takamine
    • Yuichi Takamine
    • H03H9/64
    • H03H9/14582H03H9/0057H03H9/0061H03H9/14588
    • In a balanced SAW filter, a second IDT and a fourth IDT of a five IDT type first longitudinally-coupled-resonator SAW filter element are connected via first and second wiring lines to a seventh IDT and a ninth IDT of a five IDT type second longitudinally-coupled-resonator SAW filter element, respectively. First, third, and fifth IDTs are connected to an unbalanced terminal. A sixth IDT and a first sub-IDT portion are connected to a first balanced terminal. A second sub-IDT portion and a tenth IDT are connected to a second balanced terminal. The IDTs are arranged such that the phase of an electrical signal transmitted through the first wiring line differs by 180 degrees from the phase of an electrical signal transmitted through the second wiring line.
    • 在平衡SAW滤波器中,五IDT型第一纵向耦合谐振器SAW滤波器元件的第二IDT和第四IDT通过第一和第二布线连接到第七IDT和第五IDT型的第五IDT 耦合谐振器SAW滤波器元件。 第一,第三和第五IDT连接到不平衡终端。 第六IDT和第一子IDT部分连接到第一平衡端子。 第二子IDT部分和第十IDT连接到第二平衡端子。 IDT被布置成使得通过第一布线的电信号的相位与通过第二布线发送的电信号的相位相差180度。