DC Blocks in Modern RF Labs
2025/11/27
In RF labs and production lines, DC blocks are one of those small parts that quietly protect your most expensive hardware. In practice, they are coaxial modules that use a capacitor to block DC and very low frequency content, while allowing RF signals to pass with minimal impact.This simple function becomes essential when dealing with wideband receivers, bias networks, high-power drivers, or unfamiliar customer fixtures. A well-chosen DC block can be the difference between a clean measurement and a damaged test port.