期刊名称：TELKOMNIKA (Telecommunication Computing Electronics and Control)
印刷版ISSN：2302-9293
出版年度：2019
卷号：17
期号：2
页码：1065-1070
DOI：10.12928/telkomnika.v17i2.11901
出版社：Universitas Ahmad Dahlan
摘要：In this paper, a new design of microwave sensor with high Q-factor for liquid characterization is
analyzed and investigated. The new microwave sensor is based on a gap waveguide cavity resonator
(GWCR). The GWCR consists of upper plate, lower plate and array of pins on the lower plate. The liquid
under test (LUT) is characterized by placing it inside the GWCR where the electric field concentrates using
a quartz capillary that is passing through microfluidic channels. The results show that the proposed sensor
has a high Q-factor of 4832. Moreover, the proposed sensor has the ability to characterize different types
of liquids such as oils, ethanol, methanol and distilled water. The polynomial fitting method is used to
extract the equation of the unknown permittivity of the LUT. The results show that the evaluated permittivity
using the proposed sensor has a good agreement with the reference permittivity. Therefore, the proposed
sensor is a good candidate for food and pharmaceutical applications.
其他摘要：In this paper, a new design of microwave sensor with high Q-factor for liquid characterization is analyzed and investigated. The new microwave sensor is based on a gap waveguide cavity resonator (GWCR). The GWCR consists of upper plate, lower plate and array of pins on the lower plate. The liquid under test (LUT) is characterized by placing it inside the GWCR where the electric field concentrates using a quartz capillary that is passing through microfluidic channels. The results show that the proposed sensor has a high Q-factor of 4832. Moreover, the proposed sensor has the ability to characterize different types of liquids such as oils, ethanol, methanol and distilled water. The polynomial fitting method is used to extract the equation of the unknown permittivity of the LUT. The results show that the evaluated permittivity using the proposed sensor has a good agreement with the reference permittivity. Therefore, the proposed sensor is a good candidate for food and pharmaceutical applications.
