A DC Block is a passive component that blocks DC currents while permitting RF/microwave signals to pass, based on capacitive coupling. Its structure integrates high-frequency ceramic capacitors (e.g., 100pF) and precision coaxial connectors (SMA/2.92mm), featuring ultra-wide bandwidth (100kHz-40GHz), low insertion loss (≤0.5dB), and high DC isolation (≥5kV). Widely used in radar systems, optical communication modules, and test equipment, it protects sensitive circuits from DC bias damage while ensuring unimpaired high-frequency signal transmission.
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