Abstract This work aims to improve the uniformity and efficiency of microwave heating. A dual-port simulation model based on the finite element method was built, and two pins were applied to the heating cavity. The impact of dual frequency and pins on the coefficient of variation (COV) and heating efficiency were investigated. The results demonstrated that the uniformity of dual-frequency heating can be improved by 15.4%. Moreover dual-frequency with double pins can maximally increase heating efficiency to 166.7% and the COV value can be reduced to 60.2%, compared with single-frequency heating. The heating effect of other materials was also analyzed. The uniform and efficient microwave heating were realized at dual frequency with pins.

中文翻译：

---

引脚对双频双口微波加热均匀性和效率的影响

摘要 本工作旨在提高微波加热的均匀性和效率。建立了基于有限元方法的双端口仿真模型，并在加热腔上施加了两个引脚。研究了双频和引脚对变异系数 (COV) 和加热效率的影响。结果表明，双频加热的均匀性可提高15.4%。而且双针双频加热效率最高可达166.7%，COV值较单频加热可降低60.2%。还分析了其他材料的加热效果。双频针实现均匀高效的微波加热。