Characterization of Liquid Crystals Using a Temperature-Controlled 60 GHz Resonator

This paper presents a resonant liquid crystal (LC) characterization at 60 GHz using a temperature controlled automated measurement setup. For the measurements the resonator is perturbed with LC inside a thin silica quartz tube. The LC orientation is accomplished by means of permanent rare earth magnets. Measurements are performed at 20°C. The investigated LC is the GT3-23001 mixture from Merck KGaA. The extracted values are compared with characterization results at 19 GHz. The extracted permittivities are ranging from 3.14 to 2.43 and the loss tangents from 0.0035 to 0.0191 for parallel and orthogonal orientation, respectively.