为揭示碳纳米管湿度传感器的介电损耗,制作了一种电阻型碳纳米管湿度传感器.使用介电损耗相关理论对其频率特性进行分析,并利用普适方程建立了传感器介电损耗模型.对实验数据与所建立模型进行拟合,得到拟合决定系数为0.994,表明可以使用普适方程对传感器介电损耗进行描述.由于测试频率引起的传感器电阻变化会改变传感器线性度,分析了不同测试频率下传感器的线性度,发现当测试频率为10 kHz时传感器的线性度最佳(1.52%),此时传感器灵敏度为-7.83Ω/%RH. In order to reveal the dielectric loss of carbon nanotube humidity sensor, a kind of resistive carbon nanotube humidity sensor was fabricated, its frequency characteristic was analyzed by dielectric loss theory, and the dielectric loss model of sensor was established by using universal equation. Fitting the experimental data to the established model yields a fitting decision coefficient of 0.994, indicating that the dielectric loss of the sensor can be described using pervasive equations. The change in sensor resistance due to the test frequency can change the linearity of the sensor, The linearity of the sensor under the test frequency shows that the sensor has the best linearity (1.52%) when the test frequency is 10 kHz, and the sensor sensitivity is -7.83Ω /% RH at this time.