Dielectric properties of raw Aster tataricus and its residue of decoction
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Author |
Ong H. L., Cheng E. M., Mohamad C. W. S. R., Beh C. Y. and Khor S. F.
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e-ISSN |
1819-6608 |
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On Pages
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2027-2031
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Volume No. |
17
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Issue No. |
23
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Issue Date |
15 January 2023 |
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DOI |
https://doi.org/10.59018/122207
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Keywords |
aster tataricus, dielectric constant, loss factor, electrical conductivity.
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Abstract
The plant Aster tataricus is widely used in traditional Chinese medicine to relieve cough-related illnesses. In this
work, the dielectric properties of Aster tataricus were studied in terms of dielectric constant (ε’), dielectric loss factor (ε”),
and electrical conductivity (σ). A Hioki IM3570 impedance analyser and an Agilent E5071C ENA series vector network
analyser were used for the impedance and dielectric measurement, respectively. The dielectric properties were investigated
from 12.5 kHz to 5 MHz and 50 MHz to 20GHz. All the measurements were conducted at room temperature. Aster
tataricus were dried and ground into powder for preparation of pellets before and after decoction. It can be noticed that the
variation of measured dielectric constant, dielectric loss factor, and electrical conductivity are significant over frequency.
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