Iqbal A, Smida A, Saraereh OA, Alsafasfeh QH, Mallat NK, Lee BM. Cylindrical Dielectric Resonator Antenna-Based Sensors for Liquid Chemical Detection.
Sensors (Basel) 2019;
19:s19051200. [PMID:
30857265 PMCID:
PMC6427509 DOI:
10.3390/s19051200]
[Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Accepted: 03/05/2019] [Indexed: 12/15/2022]
Abstract
A compact, cylindrical dielectric resonator antenna (CDRA), using radio frequency signals to identify different liquids is proposed in this paper. The proposed CDRA sensor is excited by a rectangular slot through a 3-mm-wide microstrip line. The rectangular slot has been used to excite the CDRA for HEM11 mode at 5.25 GHz. Circuit model values (capacitance, inductance, resistance and transformer ratios) of the proposed CDRA are derived to show the true behaviour of the system. The proposed CDRA acts as a sensor due to the fact that different liquids have different dielectric permittivities and, hence, will be having different resonance frequencies. Two different types of CDRA sensors are designed and experimentally validated with four different liquids (Isopropyl, ethanol, methanol and water).
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