Modern ham radio operators often face restrictions on antennas. This has made small antennas more popular, despite some limitations. [Tech Minds] reviews the GA-450 indoor active HF loop antenna ...

Researchers use traditional flat-knitting techniques to fabricate flexible, lightweight metasurfaces--large-aperture antennas ...

Antennas are mechanical components which either transmit or receive radio frequency signals. For transmission, an oscillating RF electrical current is fed to the antenna's terminals, where the conduit ...

ELITE 750 - Broadcasts every radio wavelength—AM,FM, LW, SW, SSB and VHF aircraft band frequencies. The 360° rotating AM antenna pulls in even the weakest of signals for full, bold sound.

The electromagnetic field travels from the antenna in all directions and at the speed of light. It travels until it hits your radio's antenna as well as hundreds of other receiving antennas.

This is the shocking moment a cargo plane crashed into a radio antenna after overshooting an airport runway in Colombia. The ...