Next Article in Journal
Multimodal Data Fusion in Learning Analytics: A Systematic Review
Next Article in Special Issue
Glide-Symmetric Holey Structures Applied to Waveguide Technology: Design Considerations
Previous Article in Journal
LPCF: Robust Correlation Tracking via Locality Preserving Tracking Validation
Previous Article in Special Issue
A Wide Frequency Scanning Printed Bruce Array Antenna with Bowtie and Semi-Circular Elements
Open AccessArticle

Modified Split Ring Resonators Sensor for Accurate Complex Permittivity Measurements of Solid Dielectrics

1
Department of Telecommunication, Telecommunications and Information Technology, Faculty of Electronics, University POLITEHNICA of Bucharest, 060042 Bucharest, Romania
2
Electrical Engineering, College of Engineering, Mustansiriyah University, Baghdad 00964, Iraq
3
Center for Technological Electronics and Interconnection Techniques, Department of Electronics Technology and Reliability, Telecommunications and Information Technology, Faculty of Electronics, University POLITEHNICA of Bucharest, 060042 Bucharest, Romania
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(23), 6855; https://doi.org/10.3390/s20236855
Received: 28 October 2020 / Revised: 28 November 2020 / Accepted: 29 November 2020 / Published: 30 November 2020
(This article belongs to the Special Issue Antennas and Propagation)
In this paper, a sensor using modified Split Ring Resonators (SRRs) is designed, simulated, fabricated, and used for advanced investigation and precise measurements of the real part and imaginary part solid dielectrics’ permittivity. Adding vertical strips tightly coupled to the outer ring of the SRR leads to the appearance of two resonant frequencies at 1.24 GHz and 2.08 GHz. This modified geometry also assures an improved sensitivity. Using the full wave electromagnetic solver, both the unloaded and loaded sensors are investigated. The numerical simulations are used to develop a mathematical model based on a curve fitting tool for both resonant frequencies, allowing to obtain analytical relations for real and imaginary parts of permittivity as a function of the sample’s thickness and quality factor. The sensor is designed and fabricated on 1.6 mm thick FR-4 substrate. The measurements of different samples, such as transparent glass, acrylic glass, plexiglass, and Teflon, confirm that the modified SRR sensor is easy to implement and gives accurate results for all cases, with measurement errors smaller than 4.5%. In addition, the measurements highlight the importance of the second resonant frequency in the cases in which numerical limitations do not allow the usage of the first resonant frequency (1 mm thick sample). View Full-Text
Keywords: metamaterials; planar sensor; non-invasive; Split Ring Resonator; dielectrics measurements; RF absorbing materials metamaterials; planar sensor; non-invasive; Split Ring Resonator; dielectrics measurements; RF absorbing materials
Show Figures

Figure 1

MDPI and ACS Style

al-Behadili, A.A.; Mocanu, I.A.; Codreanu, N.; Pantazica, M. Modified Split Ring Resonators Sensor for Accurate Complex Permittivity Measurements of Solid Dielectrics. Sensors 2020, 20, 6855. https://doi.org/10.3390/s20236855

AMA Style

al-Behadili AA, Mocanu IA, Codreanu N, Pantazica M. Modified Split Ring Resonators Sensor for Accurate Complex Permittivity Measurements of Solid Dielectrics. Sensors. 2020; 20(23):6855. https://doi.org/10.3390/s20236855

Chicago/Turabian Style

al-Behadili, Amer A.; Mocanu, Iulia A.; Codreanu, Norocel; Pantazica, Mihaela. 2020. "Modified Split Ring Resonators Sensor for Accurate Complex Permittivity Measurements of Solid Dielectrics" Sensors 20, no. 23: 6855. https://doi.org/10.3390/s20236855

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop