矩形波导中试管对液体柱散射特性的影响  

Impact of Test Tube on the Scattering Characteristics of a Liquid Cylinder in Rectangular Waveguide

作　　者：钟淑蓉[1] 刘长军[1] 许小玲[1] 

机构地区：[1]四川大学电子信息学院,成都610064

出　　处：《信息与电子工程》2006年第1期10-13,共4页information and electronic engineering

基　　金：国家自然科学基金资助项目(60301004)

摘　　要：为了探讨影响矩形波导中心加载分层介质圆柱散射特性的因素,通过实验得到了矩形波导中装满水的玻璃试管反射系数的频率响应特性,并对电磁波频率、液体相对介电常数、液体柱高度以及试管壁厚度发生变化时,试管对液体柱散射特性的影响进行了数值模拟。结果证明:当液体柱处于谐振状态,或者液体柱高度小于波导窄边高度的1/2时,试管的存在对液体柱反射系数影响较大,试管壁厚度对反射系数也有影响。该结论可用于基于波导的微波化学实验系统的研究中。The factors which may affect on the scattering characteristics of a layered dielectric cylinder in the center of a rectangular waveguide are discussed in this paper. Experiments are performed to study the frequency response characteristics of a glass test tube filled with liquid. The impact of the test tube on the scattering characteristics is simulated when the frequency of the incident electromagnetic wave, the relative permittivity, the height of the liquid and the thickness of the test tube wall vary. The results show that the influence caused by the test tube is distinct, and the thickness of the test tube wall has impact on the reflection coefficient when the liquid cylinder is under the resonance state or the height of liquid is below one half of the length of the narrow side of the waveguide. The conclusion in this paper is of great importance for the research of microwave chemistry experiment systems.

关 键 词：电子技术 反射系数 数值模拟 介电常数 矩形波导 

分 类 号：TN011[电子电信—物理电子学]