摘要
针对兰姆波谐振器谐振频率在超过6 GHz时传输损耗高的问题,提出了一种基于具有明显带隙的声子晶体(PnC)阵列的锚杆,能有效提高薄膜铌酸锂兰姆波谐振器(LWR)的品质因数(Q),从而降低兰姆波滤波器的插入损耗。通过构建PnC结构有限元仿真模型研究了PnC结构的色散关系,采用PnC延迟线模型设计,研究了PnC阵列的传输特性,并通过建立谐振器性能的对比分析。结果表明,在谐振频率稳定的条件下,与传统均匀梁锚杆谐振器相比,PnC阵列锚杆谐振器的Q值提升了5倍。
To address the high transmission loss of Lamb wave resonators at frequencies exceeding 6 GHz,this paper introduces an anchoring structure based on phononic crystal(PnC) arrays with distinct band gaps.This design effectively enhances the quality factor(Q) of lithium niobate Lamb wave resonators(LWRs),thereby reducing the insertion loss of Lamb wave filters.By constructing a finite element simulation model of the PnC structure,we analyzed the dispersion relationship of the PnC structure.Utilizing a PnC delay line model,we investigated the transmission characteristics of the PnC array.Through a comparative analysis of resonator performance,this study confirms that under stable resonance frequency conditions,the Q value of the resonator using PnC array anchors is increased by a factor of five compared to traditional uniform beam anchor resonators.
作者
聂时进
孟光
郑凯
黄栋
刘钢
NIE Shijin;MENG Guang;ZHENG Kai;HUANG Dong;LIU Gang(School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,China;Chengdu Zhiyuan Advanced Manufacturing Technology Research Institute Co,LTD,Chengdu 610511,China;School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science.Shanghai 201620,China)
出处
《压电与声光》
CAS
北大核心
2024年第4期468-473,共6页
Piezoelectrics & Acoustooptics
基金
四川天府峨眉计划资助。
