Performance optimization for magnetoelectric antennas based on a multi-field coupling analysis model

IF 2.7 3区物理与天体物理 Q2 PHYSICS, APPLIED

Journal of Applied Physics Pub Date : 2024-09-17 DOI:10.1063/5.0231433

Yue Mao, Qiyuan Jiao, Yang Shi

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引用次数: 0

Abstract

This paper presents a multi-field coupling model for magnetoelectric (ME) antennas, encompassing a ME film, electrode layers, and a substrate featuring a cavity structure. This model accounts for the nonlinear magnetoelastic coupling within the radiation layer and employs a combined DC and AC simulation methodology to capture the antenna's radiation mechanism. Leveraging this multi-field coupling model, performance differences between the ME antenna and an ideal ME composite film are analyzed. By exploring optimization schemes based on multi-physics fields, electrode materials, and structural design, the ME antenna's radiation performance is significantly enhanced. The findings demonstrate that the complete antenna structure, with its increased thickness and cavity design, exhibits a lower resonance frequency and a higher converse ME (CME) coefficient compared to the ideal ME film. The optimal CME effect is achieved under proper external stimuli, leading to a broader 3 dB bandwidth. Expanding the cavity dimensions enhances the CME coefficient by 42% and reduces the resonance frequency due to decreased acoustic wave loss. Adopting electrode materials with higher acoustic impedance elevates the CME coefficient, yet narrows the bandwidth. Conversely, using silver (Ag) electrodes promotes a broader bandwidth. Additionally, ME antenna arrays are designed to broaden the bandwidth by 300%.

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基于多场耦合分析模型的磁电天线性能优化

本文介绍了磁电（ME）天线的多场耦合模型，包括磁电薄膜、电极层和具有空腔结构的基板。该模型考虑了辐射层内的非线性磁弹性耦合，并采用直流和交流相结合的仿真方法来捕捉天线的辐射机制。利用这一多场耦合模型，分析了 ME 天线与理想 ME 复合薄膜之间的性能差异。通过探索基于多物理场、电极材料和结构设计的优化方案，ME 天线的辐射性能显著提高。研究结果表明，与理想的 ME 薄膜相比，增加了厚度和腔体设计的完整天线结构具有更低的谐振频率和更高的反向 ME（CME）系数。在适当的外部刺激下，CME 效果达到最佳，从而获得更宽的 3 dB 带宽。扩大腔体尺寸可将 CME 系数提高 42%，并由于声波损耗的减少而降低共振频率。采用声阻抗较高的电极材料可提高 CME 系数，但会缩小带宽。相反，使用银（Ag）电极则可提高带宽。此外，ME 天线阵列的设计可将带宽拓宽 300%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Applied Physics 物理-物理：应用

CiteScore

5.40

自引率

9.40%

发文量

1534

审稿时长

2.3 months

期刊介绍： The Journal of Applied Physics (JAP) is an influential international journal publishing significant new experimental and theoretical results of applied physics research. Topics covered in JAP are diverse and reflect the most current applied physics research, including: Dielectrics, ferroelectrics, and multiferroics- Electrical discharges, plasmas, and plasma-surface interactions- Emerging, interdisciplinary, and other fields of applied physics- Magnetism, spintronics, and superconductivity- Organic-Inorganic systems, including organic electronics- Photonics, plasmonics, photovoltaics, lasers, optical materials, and phenomena- Physics of devices and sensors- Physics of materials, including electrical, thermal, mechanical and other properties- Physics of matter under extreme conditions- Physics of nanoscale and low-dimensional systems, including atomic and quantum phenomena- Physics of semiconductors- Soft matter, fluids, and biophysics- Thin films, interfaces, and surfaces