A. Chapoton

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Because of their price, some substances such as liquid crystals are not available in large quantities. In this paper, we present new dielectric measurement techniques using very small samples for a wide frequency range (from 1 Hz to 26 GHz). After describing the various experimental cells used and the methods allowing the calculation of the complex(More)
C-band scatterometers can be used to measure the surface soil moisture. This technique does not directly give the water content and a signal calibration is necessary. This is done by comparing the scatterometer signal (expressed as a scattering cross section per unit area) to gravimetric samples. The gravimetric sample calibration takes a lot of time and(More)
In this paper, an automatic two-channel Time-Domain Spectroscopy (T.D.S.) system is reported. The data analysis is achieved in "real time" by using a numerical method without prior assumptions as to the form of the incident voltage pulse form or to the physical relaxation mechanisms. Two cases are treated: the lumped capacitance and the coaxial line. The(More)
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