TITLE

Apparatus for low-frequency study of high-loss dielectrics

AUTHOR(S)
Janik, P.; Tomawski, L.; Ziolo, J.
PUB. DATE
July 2001
SOURCE
Review of Scientific Instruments;Jul2001, Vol. 72 Issue 7, p3019
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The measurement setup for studying complex dielectric permittivity in a region of frequency between 10[sup -3] to 10[sup 5] Hz. Loss factor, tan δ of the sample can be very high, from 10 to 10[sup 4], because the loss resistance is compensated by negative resistance, realized by a negative impedance converter. When loss resistance is compensated by negative resistance then oscillations are excited in the circuit. An inductance is simulated by electronic inductance simulator, which quality factor Q is high and the region of setting value of inductance is eight orders wide. The unknown value of capacitance of the sample is calculated from the oscillations frequency and the unknown value of parallel loss resistance from the parameters setting on the negative impedance converter. © 2001 American Institute of Physics.
ACCESSION #
4710007

 

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