Common dielectric materials for dielectric filters can be categorized into two main groups: 1. Ceramic-Based Materials (Mainstream Choice) High-Q Ceramics: Such as magnesium titanate (MgTiO₃), strontium titanate (SrTiO₃), and calcium titanate (CaTiO₃), featuring high dielectric constants (εᵣ ≈ 20–100) and low loss (tanδ < 0.0002), suitable for high-frequency, low-insertion-loss applications. Te...