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...

Cavity filters and dielectric filters are the most commonly used types of filters in communication base stations. Among them, cavity filters are the most widely applied in macro base station systems, especially in RF front-end and combiner systems, where they are used for frequency selection and interference suppression. Cavity filters are the most common because they offer high Q factor, low inse...