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arXiv 2602.02782physics.app-ph
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具有垂直电极的 bulk 声学谐振器用于宽带滤波器

A bulk acoustic resonator with vertical electrodes for wideband filters

École Polytechnique Fédérale de Lausanne (EPFL)(洛桑联邦理工学院);Universitat Politècnica de Catalunya (UPC)(加泰罗尼亚理工大学)

Silvan Stettler, Edgar Navarro-Gesse, Carlos Collado, Jordi Mateu, Luis G. Villanueva

AI总结:

本研究提出了一种具有垂直电极的体声谐振器,通过优化机电耦合系数和频率控制,实现宽带和高鲁棒性的射频滤波器。

摘要:

射频(RF)前端对于当前及下一代(5G和6G)无线通信需求具有结合宽带宽、高功率能力和热稳定性相结合的声学滤波器。现有的表面和体声波(SAW和BAW)技术在机电耦合、光刻可调性和鲁棒性之间存在固有权衡。在这里,我们引入了具有垂直电极的体声谐振器(VBAR),这是一种结合悬吊和固装谐振器优点的设备。VBAR使用锂铌酸盐(LiNbO3)脊柱配以侧壁电极来激发剪切-水平体声共振,通过光刻工艺在机械锚定于基板的配置中提供频率控制。制造的VBAR在2-4 GHz范围内显示出超过30%的机电耦合系数,能够实现分数带宽接近20%的阶梯滤波器。尽管需要进一步优化以最小化损耗,VBAR概念为下一代无线系统提供了宽带和鲁棒的RF滤波器的替代途径。

英文摘要:

Radiofrequency (RF) front ends for current and next generation (5G and 6G) wireless communication demand acoustic filters that combine wide bandwidth, high power capability, and thermal stability. Existing surface and bulk acoustic wave (SAW and BAW) technologies face inherent trade-offs between electromechanical coupling, lithographic tunability, and robustness. Here we introduce the bulk acoustic resonator with vertical electrodes (VBAR), a device that combines the advantages of suspended and solidly mounted resonators. VBARs use lithium niobate (LiNbO3) ridges with sidewall electrodes to excite a shear-horizontal bulk acoustic resonance, providing frequency control through lithography in a configuration that is mechanically anchored to the substrate. Fabricated VBARs exhibit electromechanical coupling coefficients exceeding 30% in the 2-4 GHz range, enabling ladder filters with fractional bandwidths of nearly 20%. While further optimization is necessary to minimize losses, the VBAR concept offers an alternative route toward wideband and robust RF filters for next-generation wireless systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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