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测量了频率为1.1GHz时盐溶液的复介电常数,测量时使盐溶液的温度逐渐升高直到80℃,盐度值为1~5。先在矩形波导中测量,测量电磁波在波导中的传播相速度和衰减,并计算介电常数的实部和虚部。还在平行板经向波导中测量了受热盐溶液的复介电常数,两种测量数据十分一致。介绍了测量技术的细节和数据,发现在20~40℃时,由经验公式测算的高频电导率和复介电常数同实测数据一致,而在温度大于40℃时,测得的电导率和复介电常数都比经验数据高。
The complex dielectric constant of the salt solution was measured at a frequency of 1.1 GHz. The temperature of the salt solution was gradually raised until reaching 80 ° C and the salinity was 1-5. First measured in a rectangular waveguide, the electromagnetic wave propagation velocity and attenuation measurements in the waveguide, and calculate the real and imaginary part of the dielectric constant. The complex permittivity of the heated salt solution was also measured in a parallel plate meridional waveguide and the two measurements were very consistent. The details and data of the measurement technique are introduced. It is found that the high-frequency conductivity and the complex permittivity calculated from the empirical formula are in agreement with the measured data at 20-40 ° C, while at temperatures higher than 40 ° C, the measured conductivity and The dielectric constant is higher than the empirical data.