A new planar sensor based on the matryoshka microstrip resonator

A new planar sensor based on the matryoshka microstrip resonator is presented in this paper. The matryoshka resonator is described and its properties discussed, including initial project equations to calculate the first resonant frequencies. The sensor was fabricated and successfully applied to distinguish three different liquids (water, alcohol 46° INPM and acetone). Furthermore, the proposed sensor is employed to identify different concentrations of alcohol. The achieved results make the new planar sensor potentially attractive to many applications, motivating the investigation of its properties.