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    • 3. 发明申请
    • ELASTIC WAVE FILTER AND DUPLEXER USING SAME
    • 使用相同的弹性波过滤器和双工器
    • US20160072471A1
    • 2016-03-10
    • US14943683
    • 2015-11-17
    • SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTD.
    • Joji FujiwaraTetsuya TsurunariHiroyuki NakamuraRei Goto
    • H03H9/00H03H9/70
    • H03H9/725H03H9/0023H03H9/0038H03H9/0071H03H9/6436H03H9/6476H03H9/70
    • An elastic wave filter has an unbalanced signal terminal, first and second balanced signal terminals, and first through fifth IDT electrodes arranged in ordinal order between a pair of grating reflectors. Wiring electrodes of the third and fifth IDT electrodes are disposed adjacent a ground electrode of the fourth IDT electrode, wiring electrodes of the second and third IDT electrodes are disposed adjacent one another, and ground electrodes of the first and second IDT electrodes are disposed adjacent one another. The unbalanced signal terminal is connected to the wiring electrodes of the first, third, and fifth IDT electrodes, and the first and second balanced signal terminals are connected to the wiring electrodes of the second and fourth IDT electrodes, respectively. A pitch gradation of pitch spacing between electrode fingers in each of the first, second, and third IDT electrodes on one side of a center line in the third IDT electrode is gradually reduced by a first spacing α, and a pitch gradation of pitch spacing between electrode fingers in each of the third, fourth, and fifth IDT electrodes on the other side of the center line is gradually reduced by a second spacing β (β≠α), as the distance from the center line increases.
    • 弹性波滤波器具有不平衡信号端子,第一和第二平衡信号端子以及在一对光栅反射器之间以顺序排列的第一至第五IDT电极。 第三IDT电极和第五IDT电极的配线电极配置在第四IDT电极的接地电极附近,第二IDT电极和第三IDT电极的配线电极彼此相邻配置,第一IDT电极和第二IDT电极的接地电极相邻配置 另一个。 不平衡信号端子连接到第一,第三和第五IDT电极的布线电极,第一和第二平衡信号端子分别连接到第二和第四IDT电极的布线电极。 在第三IDT电极中的中心线的一侧的第一,第二和第三IDT电极中的每个第一,第二和第三IDT电极中的电极指之间的间距间距的间距等级逐渐减小第一间隔α,并且间距间距的间距等级 在中心线另一侧的第三,第四和第五IDT电极中的每一个中的电极指状物逐渐减小第二间距&bgr; (&bgr;≠α),因为距离中心线的距离增加。
    • 4. 发明授权
    • Acoustic wave filter
    • 声波滤波器
    • US09048816B2
    • 2015-06-02
    • US14002004
    • 2012-02-16
    • Motoki ItoNaoki Hashimura
    • Motoki ItoNaoki Hashimura
    • H03H9/00H03H9/64
    • H03H9/64H03H9/0038H03H9/0071H03H9/6489H03H2250/00
    • An acoustic wave filter has a first signal line connecting one among the plurality of first IDT electrodes and the first balanced signal terminal; a second signal line connecting the other first IDT electrode with the second balanced signal terminal; a third signal line connecting one among the plurality of second IDT electrodes with the second balanced signal terminal; and a fourth signal line connecting the other second IDT electrode with the first balanced signal terminal. The fourth signal line has an intersection portion three-dimensionally intersecting with a part of the second signal line. The intersection portion extends in a direction inclined relative to the second signal line on the major surface.
    • 声波滤波器具有连接多个第一IDT电极和第一平衡信号端子中的一个的第一信号线; 连接另一个第一IDT电极和第二平衡信号端子的第二信号线; 将所述多个第二IDT电极中的一个与所述第二平衡信号端子连接的第三信号线; 以及将第二IDT电极与第一平衡信号端子连接的第四信号线。 第四信号线具有与第二信号线的一部分三维相交的交点。 交叉部分在主表面上相对于第二信号线倾斜的方向延伸。
    • 6. 发明授权
    • Surface acoustic wave device and communication device
    • 声表面波装置及通讯装置
    • US08436696B2
    • 2013-05-07
    • US12667015
    • 2008-05-30
    • Tsuyoshi Nakai
    • Tsuyoshi Nakai
    • H03H9/72H03H9/64
    • H03H9/0038H03H9/14535H03H9/1457
    • On a piezoelectric board, a SAW element has first to fifth IDT electrodes and reflector electrodes with first to fourth electrode-finger narrow-pitch portions N1-N4 being formed in the respective ones of adjoining portions of the respective first to fifth IDT electrodes. An unbalanced signal terminal and balanced signal terminals are connected to the SAW element. The electrode finger pitches of the first to fourth electrode-finger narrow-pitch portions N1-N4 are formed symmetrically with respect to the third, central IDT electrode in such a manner that the electrode finger pitch of the first electrode-finger narrow-pitch portion N1 is narrower than that of the second electrode-finger narrow-pitch portion N2, while the electrode finger pitch of the fourth electrode-finger narrow-pitch portion N4 is narrower than that of the third electrode-finger narrow-pitch portion N3.
    • 在压电板上,SAW元件具有第一至第五IDT电极和反射器电极,在各自的第一至第五IDT电极的相邻部分中形成有第一至第四电极指窄节距部分N1-N4。 不平衡信号端子和平衡信号端子连接到SAW元件。 第一至第四电极指窄节距部分N1-N4的电极指间距以相对于第三中心IDT电极对称地形成,使得第一电极指窄节距部分 N1比第二电极指窄节距部分N2窄,而第四电极指窄节距部分N4的电极指间距比第三电极指窄节距部分N3的电极指间距窄。
    • 7. 发明授权
    • Elastic wave filter, and duplexer and electronic device using same
    • 弹性波滤波器,双工器和电子设备使用相同
    • US08427259B2
    • 2013-04-23
    • US12921580
    • 2009-03-04
    • Joji FujiwaraTetsuya TsurunariHiroyuki NakamuraRei Goto
    • Joji FujiwaraTetsuya TsurunariHiroyuki NakamuraRei Goto
    • H03H9/64
    • H03H9/725H03H9/0023H03H9/0038H03H9/0071H03H9/6436H03H9/6476H03H9/70
    • An elastic wave filter has first, second, and third IDT electrodes whose wiring electrodes are connected to unbalanced signal terminal; fourth IDT electrode disposed between the first and second IDT electrodes; fifth IDT electrode disposed between the second and third IDT electrodes; and first and second balanced signal terminals connected to the wiring electrodes of fourth and fifth IDT electrodes, respectively. The ground electrodes of the first through fifth IDT electrodes are connected to the ground. Signals in opposite phase and in phase with a signal input to unbalanced signal terminal are output from first and second balanced signal terminals, respectively. The wiring electrodes of second and third IDT electrodes are adjacent to the ground electrode of fifth IDT electrode. The wiring electrode of one of first and second IDT electrodes is adjacent to the wiring electrode of fourth IDT electrode. The ground electrode of the other is adjacent to the ground electrode of fourth IDT electrode. This configuration can suppress spuriousness in the bandpass.
    • 弹性波滤波器具有第一,第二和第三IDT电极,其布线电极连接到不平衡信号端子; 第四IDT电极,设置在第一IDT电极和第二IDT电极之间; 设置在第二和第三IDT电极之间的第五IDT电极; 以及分别连接到第四和第五IDT电极的布线电极的第一和第二平衡信号端子。 第一至第五IDT电极的接地电极连接到地面。 分别从第一和第二平衡信号端子输出与信号输入到不平衡信号端的反相和同相的信号。 第二IDT电极和第三IDT电极的布线电极与第五IDT电极的接地电极相邻。 第一IDT电极和第二IDT电极之一的布线电极与第四IDT电极的布线电极相邻。 另一个的接地电极与第四IDT电极的接地电极相邻。 该配置可以抑制带通中的杂散。
    • 10. 发明申请
    • ELASTIC WAVE FILTER AND COMMUNICATION DEVICE
    • 弹性波滤波器和通信装置
    • US20120262246A1
    • 2012-10-18
    • US13270379
    • 2011-10-11
    • Junpei YASUDA
    • Junpei YASUDA
    • H03H9/64
    • H03H9/0038H03H9/0222H03H9/14576H03H9/14582H03H9/14588
    • An elastic wave filter includes at least a piezoelectric substrate and a longitudinally coupled resonator-type elastic wave filter unit provided on the piezoelectric substrate. The longitudinally coupled resonator-type elastic wave filter unit includes first to fifth IDTs and first and second reflectors arranged on either side of the first to fifth IDTs. The third IDT includes first and second divided comb-shaped electrodes. The second and fourth IDTs are connected to an unbalanced signal terminal, the first IDT and the first divided comb-shaped electrode of the third IDT are connected to a first balanced signal terminal, and the fifth IDT and the second divided comb-shaped electrode of the third IDT are connected to a second balanced signal terminal. The first and fifth IDTs each have a constant electrode finger pitch, and the electrode finger pitch of the first IDT is less than that of the fifth IDT.
    • 弹性波滤波器至少包括设置在压电基板上的压电基板和纵向耦合的谐振器型弹性波滤波器单元。 纵向耦合的谐振器型弹性波滤波器单元包括布置在第一至第五IDT的任一侧上的第一至第五IDT以及第一和第二反射器。 第三IDT包括第一和第二分开的梳状电极。 第二和第四IDT连接到不平衡信号端子,第三IDT的第一IDT和第一分割梳状电极连接到第一平衡信号端子,第五IDT和第二分割梳状电极 第三IDT连接到第二平衡信号端子。 第一和第五IDT各自具有恒定的电极指间距,并且第一IDT的电极指间距小于第五IDT的电极指间距。