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    • 2. 发明申请
    • Acoustic wave transducer with transverse mode suppression
    • 具有横向模式抑制的声波换能器
    • US20070018755A1
    • 2007-01-25
    • US10563890
    • 2004-06-16
    • Markus MayerRalph StommerGunter KovacsAndreas BergmannPasi Tikka
    • Markus MayerRalph StommerGunter KovacsAndreas BergmannPasi Tikka
    • H03H9/64
    • H03H9/02992H03H9/02881H03H9/14532H03H9/1455
    • The invention relates to a transducer that works with surface acoustic waves in which interfering transversal modes are suppressed. This is accomplished by mutually adapting to one another the transversal excitation profile of the acoustic wave and the transversal basic mode of the waveguide formed by the acoustic spur and adjacent exterior areas. This adaptation is accomplished by dividing the acoustic spur into an excitation area and marginal areas, whereby the width of a marginal area is approximately one-quarter wavelength of the transversal basic mode, and whereby the wave number of the transversal basic mode in the excitation area is zero. In one advantageous further development of the invention, an excitation strength that is a function of the transversal coordinate can be attained that is optimally adapted to the basic mode by dividing the excitation area in the transversal direction into partial spurs that are wired to one another serially and/or in parallel.
    • 本发明涉及一种能够抑制干扰横向模式的表面声波工作的换能器。 这是通过彼此相互适应的声波的横向激励分布和由声学支线和相邻的外部区域形成的波导的横向基本模式来实现的。 这种适应是通过将声学刺激分成激发区域和边缘区域来实现的,由此边缘区域的宽度大约是横向基本模式的四分之一波长,并且由此激励区域中的横向基本模式的波数 是零。 在本发明的一个有利的进一步发展中,可以获得作为横向坐标的函数的激励强度,其通过将横向方向上的激励区域划分为相互连接的部分马刺来最佳地适应于基本模式 和/或并行。
    • 3. 发明授权
    • Bulk acoustic wave resonator and circuit comprising same
    • 体声波谐振器和包括其的电路
    • US07616079B2
    • 2009-11-10
    • US10530507
    • 2003-09-18
    • Pasi TikkaRalph StömmerEdgar SchmidhammerMichael Unterberger
    • Pasi TikkaRalph StömmerEdgar SchmidhammerMichael Unterberger
    • H03H9/205H03H9/54
    • H03H9/583
    • The invention relates to a resonator operating with bulk acoustic waves (BAW resonator, BAW=Bulk Acoustic Wave) and band-pass filters constructed of such resonators. To increase the edge steepness of the transmission band of a BAW band-pass filter, the invention proposes reducing the effective coupling of a BAW resonator by using the connection in parallel of a BAW resonator and a capacitor instead of only one resonator. In addition, to increase the edge steepness of the transmission band, the use of a connection of coupled BAW resonators in the serial branch of a filter circuit with another resonator or resonator stack in the parallel branch of the filter circuit is proposed, the additional resonator or resonator stack being connected to the center electrode of the resonator stack specified initially.
    • 本发明涉及一种使用体声波(BAW谐振器,BAW =体声波)和由这种谐振器构成的带通滤波器的谐振器。 为了增加BAW带通滤波器的传输频带的边缘陡度,本发明通过使用与BAW谐振器和电容器并联的连接而不是只有一个谐振器来降低BAW谐振器的有效耦合。 此外,为了增加传输频带的边缘陡度,提出了在滤波器电路的并联支路中使用与滤波器电路的串行分支中的另一谐振器或谐振器堆叠的耦合的BAW谐振器的连接,附加谐振器 或谐振器堆叠连接到最初指定的谐振器叠层的中心电极。