System for the Dielectric Evaluation of Powders and Liquids

El gholb, Youssef and Liu, Yaqiang and O'Leary, P (2014) System for the Dielectric Evaluation of Powders and Liquids. In: The 8th European Conference on Antennas and Propagation, April 6-11 2014, The Hague.

EUCAP 2014 System for the Dielectric Evaluation of Powders and Liquids.pdf

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A free-space broadband measurement technique is proposed to determine the dielectrics properties of powders and liquids. Two techniques are presented based on horizontal and vertical propagation, both of which allow for a series of measurements to be taken where the varying parameter is thickness of material under test (to overcome the challenge of the unknown electrical length). The horizontal propagation measurements required an extra containment layer, which had consequent mechanical and also computational difficulties. The vertical propagation measurements on the other hand show more promise, both in terms of mechanical containment and also in the inversion of the measured S-parameters to arrive at the complex electric permittivity. The measurements were performed in a large hall and also in an anechoic chamber. To minimise measurement errors a free-space Thru-Reflect-Line/Match (TRL/M) calibration technique was performed. The initial results reported here are for various glass thicknesses in the frequency range of 0.8-6 GHz, only although the application to powders and liquids will be apparent.

Item Type: Conference or Workshop Item (Paper)
Departments or Groups: Flexible Wireless Research Group
Divisions: School of Engineering
Depositing User: David Kane
Date Deposited: 14 Jul 2014 11:25
Last Modified: 22 Aug 2016 10:27

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