DocumentCode :
1197355
Title :
The Precise Determination of the Dielectric Properties of Alumina
Author :
Hill, G.J.
Volume :
23
Issue :
4
fYear :
1974
Firstpage :
443
Lastpage :
446
Abstract :
There are three methods for the determination of the dielectric properties of material in sheet form: the Hartshorn-Ward ´resonance-substitution´ technique (BS 2067), the Lynch method using a transformer bridge (BS 4542) and the two fluid immersion method. These methods may be used at frequencies up to 1 MHz, and, in this range, it is shown that the two fluid immersion method offers advantages for permittivity measurement but is not suitable for determination of tan ¿. A modified form of Q meter is then described for use in the frequency range 1-100 MHz where application of the resonance substitution method permits dielectric loss measurements to be made with a precision of better than five microradians. Measurements at microwave frequencies are made by resonant cavity techniques and comparison is made between the value of permittivity determined at 1 MHz by a cross checkable two fluid method, and those calculated from the high frequency values of permittivity and dielectric loss.
Keywords :
Bridges; Dielectric loss measurement; Dielectric losses; Dielectric materials; Dielectric measurements; Frequency measurement; Loss measurement; Permittivity measurement; Resonance; Sheet materials;
fLanguage :
English
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9456
Type :
jour
DOI :
10.1109/TIM.1974.4314331
Filename :
4314331
Link To Document :
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