Dielectric characterization based on a printable resonant stub in air and a liquid environment

Abstract

Phone: +33(0)169153775, Fax: +33 (0)1 69 15 40 50This paper develops a new approach for in situ characterization of specific dielectric-based products that are located in complex geometric containers. The method uses a resonant T-topology of microstrip lines realized on a flexible substrate. This narrowband interferometric technique consists of determining the dielectric properties via the resonance characteristics of a flexible band-stop filter. The system is designed for the application of RFID (Radio-Frequency IDentication) traceability. The proof of principle is validated experimentally and a complete comparison between an analytical approach and electromagnetic simulations are presented. The flexibility of the proposed solution allows the characterization of the liquid and container in the final form. This study highlights several measurement optimization strategies that can be combined when a material is loaded with a constituent containing alcohol concentrations ranging from 0 to 37%. The parameters extracted for the loss tangent and the relative permittivities demonstrate an accurate technique with a precision better than 5%.

Review of Recent Microwave Planar Resonator-Based Sensors: Techniques of Complex Permittivity Extraction, Applications, Open Challenges and Future Research Directions

“…One of the most significant current discussions in liquid detection using microwave resonator sensors is the binary mixture of two liquid materials. Some researchers tested various combinations of water-ethanol [11,54,55], water-acetone [56] and alcohol [57], while others tested different pure liquids such as water, ethanol, methanol [11,45,[54][55][56][57][58][59][60][61], acetone [56,60], petrol [62], isopropanol [60], benzene, ethyl acetate, hexane, pentane [63], chloroform [55,64], soya, lemon tea, Nescafe and Kickapoo [58]. Table 3 demonstrates various liquids' detection based on existing studies found in the literature.…”

“…This review shows the recent development of various studies and examples of applications of microwave planar sensors in material characterization. It includes the mathematical models for complex permittivity extraction [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ], sensing application examples of microwave sensors [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , …”

Assessment of Finger Fat Pad Effect on CSRR-Based Sensor Scattering Parameters for Non-Invasive Blood Glucose Level Detection

“…Complementary split-ring resonator (CSRR)-based sensors are one of the most widely used devices in several potential applications of microwave sensing, including the characterization of electromagnetic properties of materials, characterization of liquids, and, more particularly, biological material testing [ 19 , 20 , 21 , 22 ].…”