Why is radar hard to detect stealth aircraft while satellite telephones easily capture signals below the thermal noise floor?
In: Engineering
Stealth aircraft use several different means to be hard to detect. Their surface is structured in a way that radar waves are only reflected in 4 directions, and then use a flightplan that avoids sending a reflection in the direction of a known enemy radar station. They also absorb as much radiation as possible through special materials and a fine structure of different materials under the surface.
And it’s a lot different to find a signal that is designed to be found in a noisy background compared to basically a tiny noise spike in a noisy background
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