基于微波非热效应的谐振腔仿真设计

摘要

提出并设计了一种利用微波非热效应来实现灭菌的谐振腔，谐振频率为2．45GHz。该设计是基于重入式谐振腔理论．微波能量从谐振腔的一端通过N型连接器采用磁耦合的形式馈入，采用三维电磁仿真软件进行仿真优化与分析，并得出电磁场结构分布图，仿真结果表明：当输入功率为200W时，液体与微波互作用区域的电场强度可达106V/m以上，根据电穿孔机理，此时细菌的细胞膜将被瞬时击穿，细胞变质从而实现液体的快速灭菌。%A microwave coaxial cavity resonator based on the non-thermal effect of microwave sterilization is proposed and designed. The resonant frequency of resonator is 2.45 GHz and the design is derived from reentrant cavity theory. The microwave power is input through N-type connector with magnetic coupling from one end of the resonator. The resonator is simulated and analyzed by the software CST. The results of simulation indicate that when the input power reaches 200 W, the amplitude of E-field in the area of liquid can attain 106 V/m. According to the electroporation theory, the membrane of bacteria could be breakdown at this high electrical which could lead to the death of bacteria