Lookup NU author(s): Professor Gui Yun Tian
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Elsevier B.V., 2019.
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© 2019In this paper, a high quality factor microstrip resonator based on modified Minkowski fractal structure sensor is presented for determining the dielectric sample's complex permittivity. A high loaded quality factor value has been achieved by utilizing fractal structure, which is far greater than that of a typical rectangle microstrip antenna. Besides, the modified fractal radiation patch and the feeding section of the sensor result in a highly sensitive area to the tested materials. The sensing principle is implemented by detecting the electric fields perturbation of the resonator when different tested materials are placed over it. The complex permittivity change of the tested materials can be forecasted by transferring the acquired experimental relative resonant frequency shifts (Δf) and loaded QL values of the proposed sensor to a well-developed neural network system. To validate the proposed method, various standard dielectric samples including Teflon, PVC, and others are tested and analyzed. The experimental results are compared with published values with the maximum error of 4.9%.
Author(s): Sun H, Li R, Tian GY, Tang T, Du G, Wang B
Publication type: Article
Publication status: Published
Journal: Sensors and Actuators A: Physical
Print publication date: 01/09/2019
Online publication date: 02/07/2019
Acceptance date: 01/07/2019
Date deposited: 23/09/2019
ISSN (print): 0924-4247
Publisher: Elsevier B.V.
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