面向环境变化监测的天线传感器仿真分析

Simulation Analysis of Antenna Sensor for Environmental Change Monitoring

【目的】为了精确检测出固体材料内的环境变化,设计出一种完全开放的、埋于被测材料中的天线传感器,并在此基础上设计出一个可监测环境内各种元素变化的传感器。【方法】利用有限元法来计算天线的输入阻抗,通过建模推导出传感器的灵敏度方程,并进行仿真分析。通过调整天线旁圆柱体的距离和高度来模拟真实环境变化,验证天线传感器对周围环境进行监测的灵敏性。【结果】当圆柱体距离天线传感器在0~50 mm范围内不断移动,且改变圆柱体高度时,圆柱体高度越高,共振就越小,此时的磁场E越大,频率区间的反射系数越大。【结论】由仿真结果可知,天线传感器可测量较近环境(0~50 mm)的变化情况。当圆柱体距离天线传感器位置越近,且高度越高时,灵敏度值就越大,此时监测环境变化的情况就越精确。

[Purposes]In order to accurately detect environmental changes within solid materials,a completely open antenna sensor embedded in the material being measured is designed,and on this basis,it designs and simulates a sensor that can monitor changes in various elements in the environment.[Methods]The finite element method is used to calculate the input impedance of antennas,and the sensitivity equation required by the sensor is derived through modeling and simulated.Adjust the distance and height of the cylinder next to the antenna to simulate real environmental changes and verify the sensitivity of the antenna sensor in monitoring the surrounding environment.[Findings]When the cylinder is continuously moved within the range of 0~50 mm from the antenna and the height of the cylinder is changed at the same time,the higher the height of the cylinder,the smaller the resonance,the greater the magnetic field E,the greater the reflection coefficient in the frequency range.[Conclusions]After simulation can be that the antenna can measure changes of 0~50 mm in the nearby environment.When the cylinder is closer to the antenna position and the height is higher,the sensitivity value obtained is greater.When the sensitivity value is greater,it indicates the more accurate it is to monitor changes in the environment.