What is flat fade margin?

Flat fade margin refers to a design specification in wireless communication systems that defines the acceptable range of signal strength variation (or fading) over a given area. It ensures that the signal remains above a minimum threshold, maintaining reliable communication despite environmental factors that can cause signal degradation. A flat fade margin indicates that the system is designed to handle consistent fading across the coverage area, rather than sharp fluctuations, which can improve overall performance and user experience.