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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.42 [2004] >
IJPAP Vol.42(01) [January 2004] >
| Title: | An impedance model to improve the higher frequency limit of electrical measurements on the capacitor cell made from electrodes of finite resistances |
| Authors: | Dhar, Ravindra |
| Keywords: | High frequency impedance model
Dielectric spectroscopy
Permittivity and loss
Liquid crystals |
| Issue Date: | Jan-2004 |
| Publisher: | CSIR |
| Abstract: | Measurement of the frequency
dependent dielectric permittivity ( ') and loss ('') of the materials filled in parallel plate capacitors
are highly affected above 100 kHz due to the presence of the electrodes
resistance and leads inductance. An impedance model has been used to improve
the higher frequency limit of the dielectric measurements on the isotropic
liquids and anisotropic liquid crystal materials filled in parallel plate
capacitors made from the electrodes having finite resistance (specially indium
tin oxide coated electrodes). By using this model it has been possible to
extend the upper frequency limit of the correct measurement of capacitance and conductance
(and hence ' and '') at
least by a decade of the frequency. |
| Page(s): | 56-61 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.42(01) [January 2004]
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