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    • 2. 发明申请
    • Electroacoustic transducer for a surface wave operating component
    • 用于表面波操作部件的电声换能器
    • US20060158061A1
    • 2006-07-20
    • US10547852
    • 2003-12-16
    • Markus HauserUlrike RoeslerWerner Ruile
    • Markus HauserUlrike RoeslerWerner Ruile
    • H03H9/145
    • H03H9/14523H03H9/14517
    • The invention relates to an electroacoustic transducer for a component operating with surface waves, comprising two electrodes having alternately arranged fingers and stub fingers, each connected to a bus bar, the opposing fingers and stub fingers being separated from one another by gaps. In this case, the position of the gaps in the transverse direction preferably has a periodic variation. The pattern of the variation in the gap positions, which, in particular, influences the excitation intensity of the acoustic wave in the edge region of the transducer, is selected so that the excitation profile of the acoustic wave is adjusted to the predetermined energy density profile. As a result of such an adjustment, it is possible to significantly reduce signal losses at the resonant frequency.
    • 本发明涉及一种用于表面波操作的部件的电声换能器,包括两个具有交替排列的指状物和短针的电极,每个电极连接到汇流条,相对的指状物和短针通过间隙彼此分离。 在这种情况下,横向上的间隙的位置优选具有周期性变化。 选择间隙位置的变化的图案,其特别地影响换能器的边缘区域中的声波的激发强度,使得声波的激发分布被调整到预定的能量密度分布 。 作为这种调整的结果,可以显着降低谐振频率处的信号损耗。
    • 6. 发明授权
    • Electroacoustic transducer for a surface wave operating component
    • 用于表面波操作部件的电声换能器
    • US07449812B2
    • 2008-11-11
    • US10547852
    • 2003-12-16
    • Markus HauserUlrike RoeslerWerner Ruile
    • Markus HauserUlrike RoeslerWerner Ruile
    • H01L41/08
    • H03H9/14523H03H9/14517
    • An electroacoustic transducer includes a first electrode having first fingers connected to a first bus bar, and a second electrode having second fingers connected to a second bus bar. The first and second fingers interdigitate and terminate at ends. The ends of the first and second fingers abut gaps between the first and second electrodes. An acoustic wave of wavelength λ is excitable at a resonant frequency. The acoustic wave has a longitudinal and a transverse excitation profile and a longitudinal and a transverse energy density profile, where the longitudinal excitation profile is approximately constant and different from the longitudinal energy density profile, and the transverse excitation profile substantially corresponds to the transverse energy density profile. Transverse positions of the gaps relative to the first and second bus bars vary to substantially correspond to the transverse excitation profile across the gaps.
    • 电声换能器包括具有连接到第一汇流条的第一指状物的第一电极和具有连接到第二母线的第二指状物的第二电极。 第一和第二个手指在末端交叉并终止。 第一和第二手指的端部邻接第一和第二电极之间的间隙。 波长λ的声波在谐振频率处是可激发的。 声波具有纵向和横向激励分布以及纵向和横向能量密度分布,其中纵向激发分布近似恒定且不同于纵向能量密度分布,并且横向激发分布基本上对应于横向能量密度 个人资料 间隙相对于第一和第二母线的横向位置变化,基本上对应于穿过间隙的横向激励曲线。