论文信息 - A computer-controlled system of transmission lines for the determination of the complex permittivity of lossy liquids between 8.5 and 90 GHz

A computer-controlled system of transmission lines for the determination of the complex permittivity of lossy liquids between 8.5 and 90 GHz

A system of computer controlled transmission lines based on the method of traveling waves is presented, permitting the precise detn. of complex permittivities of medium to high loss liqs. at 8.5 to 90 GHz. It consists of a newly developed app. for the E-band region (60 ≤ v/GHz ≤ 90), which is described in detail, together with existing X- (8.5 ≤ v/GHz ≤ 12.4), Ku- (12.4 ≤ v/GHz ≤ 18), and A-band (26.4 ≤ v/GHz ≤ 40) set-ups now appropriately adapted for computer control. Consistency and accuracy of the equipment are evidenced with the help of permittivity data for water, methanol, N-methylformamide, DMF.

[1] T. J. Parker,et al. High precision dispersive spectrometry for transmission studies in the far infrared , 1989 .

[2] R. Finsy,et al. The precise microwave measurement of liquids using a multipoint technique and curve-fitting procedure , 1975 .

[3] R. Sheppard,et al. Precision waveguide cells for the measurement of permittivity of lossy liquids at 70 GHz , 1977 .

[4] J. Yarwood,et al. FT-far-infrared spectroscopic studies of solute-solvent interactions and molecular dynamics in solutions of methanol, N-methyl formamide and N,N-dimethyl formamide , 1988 .

[5] U. Kaatze. Complex Permittivity of Water as a Function of Frequency and Temperature , 1989 .

[6] Zbigniew Czumaj. Absorption coefficient and refractive index measurements of water in the millimetre spectral range , 1990 .

[7] T. E. Hodgetts,et al. Dielectric measurements on reference liquids using automatic network analysers and calculable geometries , 1990 .

[8] J. Yarwood,et al. A variable-thickness variable-temperature liquid cell for dispersive Fourier transform spectrometry , 1982 .

[9] U. Kaatze,et al. Dielectric relaxation spectroscopy of liquids: frequency domain and time domain experimental methods , 1980 .

[10] Udo Kaatze,et al. The Dielectric Properties of Water at Microwave Frequencies , 1981 .

[11] Richard Buchner,et al. Dielectric spectra of some common solvents in the microwave region. Water and lower alcohols , 1990 .