Drone Detection and Aerial Security for Large Sites

Traditional perimeter security — fencing, ground-level cameras, beam sensors — is entirely blind to a drone approaching from above, which is a genuinely different threat vector that's become more relevant as drones have become cheap and widely accessible, particularly for large industrial sites, data centers, or sensitive facilities.

Radio-frequency detection identifies a drone's control signal, radar-based detection tracks its physical movement, and some systems combine both for more reliable detection — none of them physically stop a drone (that's a separate, more restricted category of response), but they alert security staff to the presence and location of one.

This is a genuinely niche need — most residential and standard commercial sites have no realistic exposure to drone-based threats worth the investment. It's relevant for large industrial facilities, data centers, or sites with specific high-value or sensitive operations where aerial surveillance or intrusion is a plausible, not hypothetical, risk.