| 李建波,刘婷婷†,董红梅,郭辉辉,任万春.声激励低频多模磁电天线谐振特性*[J].,2024,43(4):756-764 |
| 声激励低频多模磁电天线谐振特性* |
| The resonance characteristics of acoustically excited low frequency multimode magnetoelectric antenna |
| 投稿时间：2023-03-31 修订日期：2024-07-03 |
| 中文摘要: |
| 传统的低频通信系统成本高、体积大、功耗高，这限制了它在透地/透水通信、地质勘探和军事等领域的应用。基于多铁性材料构成的磁电天线是利用声谐振取代电磁谐振从原理上克服传统低频天线小型化的难题。磁电天线不同的谐振模态对应着不同的谐振特性，这决定了天线的工作频率和辐射强度，然而磁致伸缩层厚度影响天线的谐振特性。针对这些问题，利用有限元方法得到了磁致伸缩层厚度对天线谐振特性的影响。结果表明，随着磁致伸缩层厚度增加，厚度纵波谐振的谐振频率降低，弯曲谐振、长度剪切波谐振和宽度兰姆波谐振的谐振频率增加。制备了不同磁致伸缩层厚度的天线样机，对天线的谐振特性进行测试，实测结果与仿真结果基本一致。此外，研究了磁致伸缩层厚度对天线机械损耗的影响。随着磁致伸缩层厚度增加，天线的机械损耗先减小后增加。多模低频磁电天线的谐振特性和机械损耗的研究可以为天线的频率设计提供指导，并为增强其辐射强度提供思路。 |
| 英文摘要: |
| Traditional low-frequency communication systems have high cost, large volume, and high power consumption, which limit their application in the fields of ground-penetrating/water-penetrating communication, geological exploration, and military. The magnetoelectric antenna based on multi-ferroic materials uses acoustic resonance instead of electromagnetic resonance to overcome the problem of the miniaturization of a traditional low-frequency antenna in principle. Different resonant modes of the magnetoelectric antennas correspond to different resonant characteristics, which determine the working frequency and radiation intensity of the antenna. However, the thickness of the magnetostrictive layer affects the resonant characteristics of the antenna. To solve these problems, the influence of magnetostrictive layer thickness on the resonant characteristics of the antenna is obtained by using finite element method. The results show that as the thickness of the magnetostrictive layer increases, the resonant frequencies of the thickness longitudinal resonance decrease, and the resonant frequencies of the bending resonance, length shear wave resonance, and width Lamb wave resonance increase. The antenna prototypes with different thicknesses of the magnetostrictive layer are prepared, and the resonant characteristics of the antenna are tested. The measured results were consistent with the simulation results. In addition, the influence of magnetostrictive layer thickness on the mechanical loss of the antenna is studied. With the increase of magnetostrictive layer thickness, the mechanical loss of the antenna decreases first and then increases. The research on resonant characteristics and mechanical loss of multi-mode low-frequency magnetoelectric antenna can guide the frequency design of the antenna and provide ideas for enhancing its radiation intensity. |
| DOI：10.11684/j.issn.1000-310X.2024.04.007 |
| 中文关键词: 声波谐振 磁电天线 谐振特性 机械损耗 |
| 英文关键词: Acoustic resonator Magnetoelectric antenna Resonance characteristic Mechanical loss |
| 基金项目: |
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