体声波磁电天线辐射性能的解析计算  

Analytical Calculation of Radiation Performance of BAW Magnetoelectric Antenna

作　　者：彭春瑞 李君儒 钟慧[1] 任万春 高杨[3] PENG Chunrui;LI Junru;ZHONG Hui;REN Wanchun;GAO Yang(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China;College of Optoelectronic Engineering,Chongqing University,Chongqing 400044,China;School of Information Engineering,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]电子科技大学电子科学与工程学院,四川成都610054 [2]重庆大学光电工程学院,重庆400044 [3]西南科技大学信息工程学院,四川绵阳621010

出　　处：《压电与声光》2020年第1期34-37,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(61574131)

摘　　要：针对国内外对体声波磁电天线原理的解析计算与设计方法的研究还不成熟,以及现有解析计算方法存在误差的问题,提出了一套相对精确的体声波磁电天线的解析计算方法。利用该解析计算法分别计算了磁电天线中压电层和磁致伸缩层的势能,并求出磁电天线的总势能。由于磁电天线的辐射功率是由磁致伸缩层表面的孔径电场决定,故利用本构方程将孔径电场替换为正弦分布的应力场,对磁电天线的平均辐射功率进行了求解,进而得到归一化的天线辐射品质因数。通过对不同层数结构磁电天线的归一化后势能、平均辐射功率和辐射品质因数等性能参数的比较分析,得到了优选的“压电层-磁致伸缩层-压电层”三层交替堆叠结构,实现了磁电天线辐射性能的最优化多层设计。The research on the analytical calculation and design method of bulk acoustic wave(BAW)magnetoelectric antenna is not mature.In view of the errors of existing analytical calculation methods,a set of relatively accurate analytical calculation method for BAW magnetoelectric antennas is proposed.The potential energy of piezoelectric layer and magnetostrictive layer in the magnetoelectric antenna is calculated by the analytical method,and the total potential energy of the magnetoelectric antenna is calculated.Since the radiation power of the magnetoelectric antenna is determined by the aperture electric field of the magnetostrictive layer surface,the constitutive equation is used in this paper to replace the aperture electric field with the sinusoidal stress field,and the average radiation power of the magnetoelectric antenna is calculated,and then the normalized antenna radiation quality factor is obtained.By comparing and analyzing the normalized potential energy,average radiation power and radiation quality factor of the magnetoelectric antenna with different layers,the optimized three-layer alternating stacking structure of‘piezoelectric layer-magnetostrictive layer-piezoelectric layer’is obtained,and the optimal multi-layer design of the radiation performance of the magnetoelectric antenna is realized.

关 键 词：磁电天线 磁电效应 体声波 辐射品质因数 平均辐射功率 势能 

分 类 号：TN384[电子电信—物理电子学] TN828.4