School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China.
Sensors (Basel). 2023 Jan 19;23(3):1139. doi: 10.3390/s23031139.
Surface conductivity is one of the key factors in judging whether the RCS (Radar Cross Section) test model is qualified, but the accuracy of traditional detection methods is insufficient. Furthermore, the resistance between two points obtained by traditional methods cannot be directly applied to the electromagnetic simulation analysis of the test model. In this paper, the theoretical model of the relationship between resistivity and resistance between two points on the model surface is proposed. The simulation method for the resistance between two points on the model surface is established. The advantage of the method proposed in this paper compared with the traditional method in detecting the surface resistance of the model is demonstrated intuitively. The experiments are carried out on ITO (Indium Tin Oxide) conductive films with several dimensions and resistivity. Results show that the measured resistance between two points on the model surface is highly consistent with the theoretical and simulated values. Moreover, the comparison of experiments shows that the measurement error of the traditional method is 150% to 200% higher than that of the method proposed in this paper.
表面电导率是判断 RCS（雷达散射截面）测试模型是否合格的关键因素之一，但传统检测方法的准确性不足。此外，传统方法获得的两点之间的电阻不能直接应用于测试模型的电磁模拟分析。本文提出了模型表面电阻率与两点之间电阻关系的理论模型，建立了模型表面两点之间电阻的模拟方法。直观地证明了本文提出的方法与传统方法在检测模型表面电阻方面的优势。在几个尺寸和电阻率的 ITO（铟锡氧化物）导电膜上进行了实验。结果表明，模型表面两点之间的实测电阻与理论和模拟值高度一致。此外，实验比较表明，传统方法的测量误差比本文提出的方法高 150%至 200%。
