Laboratory technique for measuring complex dielectric constant o

Details Laboratory technique for measuring complex dielectric constant o Laboratory technique for measuring complex dielectric constant o

1989-03-31

1991-02-26

Strecker, Gerard R.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

G01R 2704

Patent

active

049964895

ABSTRACT:
A system for measuring the complex dielectric constant of a core sample is set forth. It incorporates a circular wave guide having a central axial transmitter coil. Equally spaced axial receiver coils are placed on both sides of the transmitter coil. The opposite polarity receiver signals are connected to an adder circuit to provide an output signal representing only the difference in the two received signals. By placing a standard such as air between the transmitter coil and one receiver coil, or core sample positioned between the transmitter coil and the other receiver coil provides a system for obtaining an output indicative of complex dielectric constant. Optionally, the system is operated in an oven to provide an elevated temperature, and can also be pressurized with a compressed fluid.

REFERENCES:
patent: 4626773 (1986-12-01), Kroeger
patent: 4634963 (1987-01-01), Lunden
Gestblom et al., "A Computer Controlled Dielectric Time Domain spectrometer;" J. Phys. E. Sci. Instrum. vol. 13, No. 10 Oct. 1980 pp. 1067-1070.
Jaeger et al., "Microwave Measurements . . .", The Rev. of Sci. Instrum., vol. 41, No. 6, Jun. 1970, pp. 820-823.
Musil, "New Microwave System . . ." Czech. J. Phys. B 25 [1975], pp. 916-926.
Kilp, "Precise Measurement of the Complex Permittivity . . ." J. Phys. E (GB) Sci. Instrum., vol. 10, No. 10, (Oct. 1977), pp. 985-989.
Szwarnowski et al., "Precision Waveguide . . . ," J. Phys. E. (GB) Sci. Instrum., vol. 10, No. 11 (Nov. 1977), pp. 1163-1167.
Weir, "Automatic Measurement of Complex . . . ," Proc. IEEE., vol. 62, No. 1, (Jan. 1974) pp. 33-36.

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