ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
By using a microwave cavity tuned oscillator (MCTO), the relative dielectric constant ε of nonpolar dielectric fluid was measured with high accuracy. The theory of this technique was studied in detail. A new formula for evaluating the uncertainty of the measured ε was derived. From the formula, we have found that MCTO has a locking characteristic and therefore only operates in certain discrete regions. We have also found that a higher resonant frequency f of the MCTO, a longer delay time of the delay line, and a higher quality factor of the cavity Q lead to a higher accuracy of the measurement. When the values of the above parameters are taken properly, the uncertainty measured ε by the MCTO may become as small as an order of 10−5. The ε of saturated liquid nitrogen was measured by this approach and the experimental results agree very well with the values calculated by our formula. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1147127
