FORT JACKSON, S.C. -- Some people using garage door openers near Fort Jackson may experience problems with their remotes as local military radio systems are scheduled to transition to a new frequency ...

SETI's 1977 "Wow!" signal from deep space was even stronger than originally thought, but its source remains a complete ...

If you’ve ever heard sirens screaming from nearby streets and wished you knew what was happening, there’s a simple solution: a police scanner. These devices are somewhat similar to your average radio, ...

This article originally appeared in our World’s Greatest Telescopes special issue from summer 2012. The pursuit of radio astronomy is a quest for cosmic whispers. By the time radio telescopes collect ...

What are harmonics in RF systems? A given signal’s second harmonic is approximately twice the given signal’s fundamental frequency. Ideally, amplifiers are expected to have zero non-linearities in the ...