Abstract
A metamaterial-based transmission line sensor was designed to determine the amount of methanol in methanol-contaminated local spirit samples both numerically and experimentally. The proposed sensor consists of a square split-ring resonator and a transmission line. The dielectric constants of four different types of branded local spirit samples were measured. Electric field distribution has been given when the sample holder was filled with branded local spirit. Then the results were compared to show that they have almost the same characteristics. After different percentages of methanol were added to the chosen branded local spirit samples their dielectric characteristics were observed. Numerical and experimental sensing studies were conducted in these methanol-branded local spirit mixtures. As the methanol content increases in the local spirit samples, the operating frequency shifts linearly. The proposed sensor has 150 MHz bandwith and is capable of determining the level of methanol content in the branded local spirit sample.
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