Permittivity monitor uses ultra wide band transmission

Details Permittivity monitor uses ultra wide band transmission Permittivity monitor uses ultra wide band transmission

2006-06-27

2006-06-27

Lee, Diane (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

C324S639000

Reexamination Certificate

active

07068051

ABSTRACT:
Narrow pulses transmitted wirelessly from a transmitting antenna to a receiving antenna are used to measure the electrical permittivity of the medium of interest between the two antennas. Timing signals are transmitted along a shielded transmission line coincident with the wireless transmission through the medium. The received waveform is digitized in the time domain and analyzed to determine the propagation time. The effects of dispersion caused by the conductive and dielectric properties of the medium on the transmitted waveform are overcome through analysis of the digitized waveform, resulting in an accurate measurement of the propagation time and thus the permittivity of the medium, from which volumetric moisture content may be derived.

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patent: 2003/0024155 (2003-02-01), Kuroda et al.
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