Microstructure and Characterization of Low-Loss Terahertz Dielectric Ceramics

Terahertz (THz) technology has great potential in applications of material, chemical, communication and life sciences. The development of low loss THz devices has been promoted in recent years to boost the technologies. Here, the 0.95MgTiO 3 –0.05CaTiO 3 and TiO 2 ceramic systems have been investigated. The influence of sintering process, microstructure has been discussed to optimize the THz performance. The 0.95MgTiO 3 –0.05CaTiO 3 ceramics can possess permittivity of 18 and ultra-low loss of 1.9 × 10−3 the TiO 2 ceramics show high permittivity of 102 and ultra-low loss of 4.2 × 10−3.