摘要
基于微波谐振腔微扰原理建立了应用于测量葡萄糖溶液浓度的谐振腔传感器模型。采用HFSS仿真软件对不同孔耦合结构尺寸的谐振腔进行仿真,通过比较耦合孔S11曲线得到谐振腔的最优化尺寸。仿真结果表明,该微波谐振腔耦合孔半径为3.5 mm,波导长30 mm时,微波谐振腔具有优越的电磁性能和很高的分辨率。以不同浓度的葡萄糖溶液为该谐振腔的加载样品,采用优化后的谐振腔模型进行仿真,结果表明不同浓度的葡萄糖溶液所引起的谐振频率变化显著,其变化幅度可以在S曲线上得出,通过检测频移的变化就可以得到葡萄糖溶液的浓度。
This Paper sets a model of microwave resonator cavity used for measuring the concentration of glucose solution based on the perturbation principle.HFSS simulation software is adopt to emulate resonator cavity with different size of coupling aperture,and the optimal size can be got by comparing the different S11 curves.The simulation results show that the resonant cavity has better electromagnetism characters and high resolution when the radius of coupling aperture is 3.5 mm and the length of waveguide is 30 mm.Using different concentration of glucose solution as the loading material into the resonant cavity did emulation for the optimal resonator cavity model.The simulation results indicate that the resonant frequency changed dramatically after setting material into the resonant cavity,and the change can be received in the S11curve.To measure the changes of frequency shift can ascertain the concentration of glucose solution.
出处
《电子测量与仪器学报》
CSCD
2012年第10期911-916,共6页
Journal of Electronic Measurement and Instrumentation
关键词
微波谐振腔
孔耦合
波导
葡萄糖溶液
microwave resonator cavity
coupling aperture
waveguide
glucose solution
