用于橡胶轮胎微波硫化的全向缝隙天线设计

Design of an Omnidirectional Slot Antenna for Microwave Vulcanization of Rubber Tires

为了实现橡胶轮胎内部的微波硫化,本论文设计了一种5.8 GHz全向圆波导缝隙天线,该天线平行于胎侧,放置于橡胶轮胎内部中心位置,并利用矩形波导TE 10-圆波导TM 01模式转换器实现所需微波模式的馈入。利用CST三维电磁仿真软件对其进行建模仿真优化分析,最终使天线反射系数在中心频点处小于-15 dB,水平方向不圆度小于1.4 dB,3 dB带宽达到59°,并且方向图具有良好的全向辐射特性,当输入功率为5 kW时,不发生击穿打火现象;模式转换器在中心频点处反射参数小于-15 dB,模式转换效率达到99%,能实现良好的模式转换。

In order to realize microwave vulcanization inside rubber tires,a 5.8GHz omnidirectional circular waveguide slot antenna is designed.The antenna is placed parallel to the sidewall in the center position of the rubber tire interior,and a rectangular waveguide TE10 to circular waveguide TM01 mode converter is used to achieve the required microwave mode feed.Three-dimensional CST electromagnetic simulation software is used to simulate and optimize the antenna.The reflection coefficient of the optimal antenna is less than-15 dB at the center frequency point,the horizontal incompleteness is less than 1.4 dB,the 3 dB bandwidth reaches 59°,and the pattern has good omnidirectional radiation characteristics.When the input power is 5kW,there is no breakdown and ignition phenomena.The mode converter reflects parameters less than-15 dB at the center frequency point,and the mode conversion efficiency reaches 99%,which can achieve good mode conversion.