Disclosed are novel mesogenic compounds, liquid crystal compositions (liquid-crystalline media) comprising them and suitable for high-frequency technology, and high-frequency devices using them, such as phase shifters, antennas, tunable filters, switching devices, e.g. operated in the microwave region, to a process for preparing the compositions. The liquid crystal compositions have high optical anisotropy, a positive dielectric anisotropy and a wide temperature range of nematic phases.

The present disclosure relates to novel mesogenic compounds, to liquid crystal compositions (liquid-crystalline media) comprising them and suitable for high-frequency technology, and to high-frequency devices using them, such as phase shifters, antennas, tunable filters, switching devices, e.g. operated in the microwave region, to a process for preparing said compositions. A liquid-crystalline medium of the present disclosure includes: at least one compound of the formula I and at least one compound of the formula II; or at least one compound of the formula I and at least one compound of the formula III; or at least one compound of the formula II and at least one compound of the formula III; or at least one compound of the formula I and at least one compound of the formula II and at least one compound of the formula III. The present disclosure makes it possible to create liquid crystal compositions with high optical anisotropy (n), a positive dielectric anisotropy () and a wide temperature range of the nematic phases.