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Cylindrical Dielectric Resonator Antenna-Based Sensors for Liquid Chemical Detection

Centre for Wireless Technology (CWT), Faculty of Engineering, Multimedia University, Cyberjaya 63100, Malaysia
Department of Medical Equipment Technology, College of Applied Medical Sciences, Majmaah University, AlMajmaah 11952, Saudi Arabia
Unit of Research in High Frequency Electronic Circuits and Systems, Faculty of Mathematical, Physical and Natural Sciences of Tunis, Tunis El Manar University, Tunis 2092, Tunisia
Department of Electrical Engineering, Hashemite University, Zarqa 13115, Jordan
Department of Electrical Power and Mechatronics Engineering, Tafila Technical University, Tafila 11183, Jordan
College of Engineering, Al Ain University of Science and Technology, Al Ain 64141, UAE
School of Intelligent Mechatronics Engineering, Sejong University, Seoul 05006, Korea
Authors to whom correspondence should be addressed.
Sensors 2019, 19(5), 1200;
Received: 23 February 2019 / Accepted: 5 March 2019 / Published: 8 March 2019
(This article belongs to the Special Issue Antenna Technologies for Microwave Sensors)
PDF [2752 KB, uploaded 12 March 2019]


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 H E M 11 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). View Full-Text
Keywords: dielectric resonator; chemical sensing; S-parameters; circuit model dielectric resonator; chemical sensing; S-parameters; circuit model

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Iqbal, A.; Smida, A.; Saraereh, O.A.; Alsafasfeh, Q.H.; Mallat, N.K.; Lee, B.M. Cylindrical Dielectric Resonator Antenna-Based Sensors for Liquid Chemical Detection. Sensors 2019, 19, 1200.

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