In this study, Chiral Metamaterial Sensor (CMS), which is designed by utilizing a Split Ring Resonators (SRR) has been employed to reveal the two different types of sensor applications by experimentally and numerically. These applications include purity demonstration of methanol, ethanol and isopropyl alcohol (IPA) and fuel adulteration applications for petrol. All of the validations have been realized by measuring the complex permittivity values and reflection coefficients by using a vector network analyzer and a sample holder. For simulation, FIT based simulation program is employed. Both numerical and experimental study results are complying with each other. Sample holder which is developed in this study for microfluidic measurements can easily be tuned for other microfluidic sensor applications thanks to its unique design. Having 280MHz bandwidth with −40dB signal level indicates that the proposed structure is highly sensitive and gives a linear output according to purity and adulteration applications. Whereas, there are many metamaterial researches on purity applications in literature, this is the first study that investigates the purity of methanol, ethanol, isopropyl alcohol (IPA) and fuel adulteration of petrol by using a novel chiral metamaterial sensor designed specifically for the proposed applications.

The detection of branded and unbranded chemical materials is essential for the quality control assessment. In this work, a metamaterial inspired sensor is designed and fabricated, which incorporates oval-shaped wing resonators, in order to use to detect branded and unbranded diesels in the X-band frequency region. The simulation studies were carried out by using the Computer Simulation Technology (CST) Microwave studio. A transmission line was introduced into the sensor design and genetic algorithm was used to optimize the proposed structure. Parametric study was investigated by changing the permittivity, permeability of the sensor layer, width of the transmission line, materials of the substrate layer, and width of the resonator. Results showed that different factors can be considered to sense the chemical materials including the shift in resonant frequency and amplitude variation in the reflection or transmission spectrum. It was found that the sensible variation in the transmission value is about −3.2 dB, which is superior to that reported in literature. It was concluded that the sensor is highly sensitive to distinguish the branded diesel from the unbranded one, which makes it viable for detecting fluidics in the chemical industry and medicine.

We propose a microwave imaging structure with GSM, ISM, Wi-Fi, and WiMAX operating frequencies at 1.80, 2.45, and 5.80 GHz, respectively. The suggested structure is based on a microwave antenna-inspired absorber with cavities in resonator layers. Our study, which is validated using simulation and experimental techniques, deals with the absorption of the incident electromagnetic waves at 1.80, 2.45, and 5.80 GHz for creating the image when radio frequency microwave is employed. The above-mentioned three operating frequencies, by which electromagnetic waves are radiated from three different antennas, are read via digital oscilloscope and finally these voltages are converted to 256 gray-leveled pixel values of each cell. During the experimental testing, simulated and tested values complied with each other. Small differences occurred due to calibration and testing errors. The novelty of this study is having image capability with most commonly used frequency bands by absorbing microwave energy.

In this work, transmission line based metamaterial liquid sensor is proposed to determine the authentic and inauthentic gasoline samples. Proposed structure consists of transmission line integrated metamaterial based resonator layer with a sensing gap. Operating frequency is chosen in X band which is different from the studies in the literature. In addition, this sensor can be used to detect different liquids in X band which can be considered as another advantage of the proposed sensor. In the literature, studies mostly focused on terahertz regime but this study proposes a solution in microwave frequency range. Simulations are carried out by using Finite Integration Technique (FIT) based electromagnetic simulation software. In addition, experimental studies are also carried out to provide accurate results and comparison. According to the results, fabricated structure can be used as a liquid detector. The most important property of the proposed structure is to be compatible to different frequencies between 1GHz and 20 GHz. This metamaterial based sensor can be used in many application fields such as medical, military, oil refineries, and so on.