Numerical curve fitting technique for evaluating complex permittivity of liquids of millimetre and centimetre wavelengths

A new technique, based on the cavity resonance, of measuring the complex dielectric permittivity of liquid samples is described in detail. The errors in the measurement of the real and imaginary parts of the complex dielectric permittivity are ∼±1% and ±3%, respectively. The complex dielectric permittivity values measured using this method for some standard liquids are also presented. A comparison is made between the present values and the values obtained using standard techniques.

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New approach of measuring the Q factor of a microwave cavity using the cavity perturbation technique

Subramanian

Sobhanadri

1994

Review of Scientific Instruments

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A new approach of measuring the quality factor of the reflection type microwave cavity resonator for calculating the complex dielectric permittivity of solid and liquid samples in the cavity perturbation technique is proposed. This approach, based on the measurement of reflected power from the cavity at resonance, effectively reduces the measurement procedure and increases the accuracy. As the quality factor can be measured very fast using this approach, this approach can be extended to monitor the conductivity decay of the semiconductor samples.

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Numerical curve fitting technique for evaluating complex permittivity of liquids of millimetre and centimetre wavelengths

Cited by 9 publications

References 12 publications

Dielectric studies of allyl alcohol with (i) Pyridine, (ii)1,4-Dioxane and (iii)Phenol hydrogen bonded complexes

Dielectric studies of allyl alcohol with (i) Pyridine, (ii)1,4-Dioxane and (iii)Phenol hydrogen bonded complexes

A new technique of measuring the complex dielectric permittivity of liquids at microwave frequencies

New approach of measuring the Q factor of a microwave cavity using the cavity perturbation technique

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