本文基于无线充电，通过基于有限元法的电磁仿真软件（HFSS）对线圈天线进行3D建模。在二端口网络分析法的基础上，建立谐振式无线充电的等效电路模型，求解出系统最大传输效率时的表达式。基于以上方法，研究本文设计的线圈天线传输特性，包括线圈天线的S参数、驻波比、充电效率和3D电磁场分布图，得出线圈天线在中心频率2.8 GHz处发生谐振，输入回波损耗最小，为-29.11 dB，且充电效率可达到84.15%。此外，线圈天线具有成本低、结构简单等优势，因此该设计对无线充电的研究有很好的借鉴作用。
The paper is proposed based on wireless charging, we establish 3D modeling coil antenna via electromagnetic simulation software HFSS which is based on Finite Element Method (FEM). The equivalent circuit model of wireless charging via magnetic resonance coupling is analyzed to solve the expression of the maximum transmission efficiency based on the two-port network analysis method. Based on the above method, make a research on characteristics of the coil antenna in this paper which is including: S parameters plot, standing-ware ratio, charging efficiency and 3D electromagnetic field distribution of the coil antenna. It turns out that when the coil antenna occurs resonance at the center frequency (2.8 GHz), the input return loss is minimum (29.11 dB) and charging efficiency can reach 84.15%. In addition, the coil antenna has advantages on its lower cost and simple structure, so the design to the research of wireless charging has a good reference.
2018,(): 111-114 收稿日期：2016-10-21
DOI：10.3404/j.issn.1672-7649.2018.02.021
分类号：TN014.1;TN823+.31
基金项目：江苏省科技型企业技术创新资金资助项目（BC2015190）
作者简介：刘璐(1992-),女,硕士研究生,研究方向为无线电能传输
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