> "The people pointing out that the F-35 had radar reflective disks added didn't seem to have understand the article (or technology). This is using entirely dif

> "The people pointing out that the F-35 had radar reflective disks added didn't seem to have understand the article (or technology). This is using entirely different methods to detect the aircraft, not radar waves, so that's irrelevant." Passive radar is just radar that takes advantage of existing radio broadcasts (such as TV and radio stations). This particular passive radar setup may well use a different frequency range than military radars, but it's still working on the same basic principle of any other radar. It seems plausible that a plane equipped with RF reflectors would reflect a broad range of signals, and that a skeptical person could reasonably want an explanation of any claim that the reflectors are in fact non-reflecting in the relevant bands.