The design of sensor to accurately measure the atmospheric refractivity online

The accuracy of atmospheric refractivity measurement determines the correctness of radar refraction error correction and the precision atmospheric duct measurement, but the conventional gas sensor can not measure the atmospheric refractivity accurately. So in this paper, the sensor, high Q microwave resonator based on the principle that the resonant frequency is different when different medium pass through, which can measure the atmospheric refractivity on-line accurately, is proposed and it is designed from the size of the microwave resonator, electromagnetic coupling, ventilation, material and processing technology. At last, the experiment results are given and these results show that the sensor has higher measurement accuracy and faster measurement speed and the measurement accuracy of atmospheric refractivity can meet the request of radar refraction error correction and the atmospheric duct measurement.