1. Overview In satellite and aerospace communication payloads operating above 30 GHz, PCB substrates must maintain exceptional dielectric uniformity and low-loss performance under extreme thermal and radiation conditions. Ceramic PCB materials—such as alumina (Al₂O₃) and aluminum nitride (AlN)—are widely adopted due to their high dielectric constant, stable dissipation factor, and superior heat conduction. KKPCB’s...


