一种双端口天线馈电的腔体设计

Design of a Cavity Fed by Two-Port Antennas

微波作为一种新型的清洁能源广泛地应用于食品、化工、冶金和污水处理等众多领域。微波加热与传统加热相比具有选择性加热、体加热和清洁加热等优势。然而在微波加热过程中存在加热不均匀的弊端,双频加热是实现微波均匀加热强有力手段,但是双频之间的相互耦合削弱了微波加热的效率。本文基于有限元算法的COMSOL Multiphysics仿真软件建立了一个双端口天线馈电的加热模型,通过双频加热提高了微波加热的均匀性,通过两个窄带单频天线的设计减小了端口之间的相互耦合,在提高均匀性的同时保证了加热效率。

As a new type of clean energy,microwave is widely used in many fields,such as food processing,metallurgy and sewage treatment.Compared with traditional heating,microwave heating has the advantages of selective heating,bulk heating and clean heating.However,microwave heating has the inherent shortcoming of uneven heating.Dual frequency heating is a powerful method to achieve uniform heating,but the coupling between the two frequencies weakens the efficiency of microwave heating.In this research,a heating model with two-port antenna feeding is established by using COMSOL Multiphysics simulation software based on finite element method.In this model,the uniformity of microwave heating is improved by dual frequency heating,and the coupling between ports is reduced by the design of two narrowband single frequency antennas,which improves the uniformity and ensures the heating efficiency.