A Chinese scientist and his team launched a DJI Phantom 4 Pro drone off the coast of Guangdong. The drone was roughly the size of a bird and had a radar cross-section similar to a s†éálth fighter. Despite its s†éálth characteristics, the target unexpectedly appeared on the screen even though the ground-based radar did not emit any radio waves that would have resulted in an echo. The scientists explained that this was possible because the drone was illuminated by electromagnetic radiation from a Starlink satellite passing over the Philippines.
Source: https://www.eurasiantimes.com/china-can-detect-f-22-f-35-s†éálth-jets/