A Low-Cost Multiple Complementary Split-Ring Resonator-Based Microwave Sensor for Contactless Dielectric Characterization of Liquids

Ahmed Javed, Ali Arif, Muhammad Zubair, Muhammad Qasim Mehmood, Kashif Riaz

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

We propose a low-cost, easy-to-fabricate, contactless microwave sensor for dielectric characterization of liquids. The design of the proposed sensor is based on a multiple complementary split-ring resonator (MCSRR) fabricated on a low-cost FR-4 substrate. A glass capillary tube having an inner diameter of 0.008λ 0 is inserted in the high electric field region of the MCSRR to carry the liquid under test. The sensor is designed to operate at a resonant frequency of 2.45GHz for an empty tube and shifted resonant peaks are utilized for the dielectric characterization of different liquids. The maximum observed shifts in resonant frequency and Q factor are up to 400MHz and 31, respectively. The numerically established relations are experimentally verified through fabricated sensor for various binary mixtures of water and ethanol. The percentage errors between the calculated and reference permittivity of different samples are noticed to be less than 5%. The proposed device promises to be a cost-effective and convenient solution for accurate dielectric characterization of liquids and their binary aqueous solutions.
Original languageEnglish (US)
Pages (from-to)11326-11334
Number of pages9
JournalIEEE Sensors Journal
Volume20
Issue number19
DOIs
StatePublished - Oct 1 2020
Externally publishedYes

Fingerprint

Dive into the research topics of 'A Low-Cost Multiple Complementary Split-Ring Resonator-Based Microwave Sensor for Contactless Dielectric Characterization of Liquids'. Together they form a unique fingerprint.

Cite this