Radio propagation antennas (monopoles) are required. Since the ground is not a perfect electrical conductor, ground waves are attenuated as they follow the Earth’s surface. Attenuation is proportional to frequency, so ground waves are the main mode of propagation at lower frequencies, in the MF, LF and VLF bands. Ground waves are used by radio broadcasting stations in the MF and LF bands, and for time signals and radio navigation systems. At even lower frequencies, in the VLF to ELF bands, an Earth-ionosphere waveguide mechanism allows even longer range transmission. These frequencies are used for secure military communications. They can also penetrate
Radio Waves (Eli Young Band song) on the "Billboard" Hot Country Songs chart on the chart dated July 25, 2009. Radio Waves (Eli Young Band song) "Radio Waves" is a song recorded by American country music group Eli Young Band. It was released in June 2009 as the third single from the album "Jet Black & Jealous". The song reached number 35 on the "Billboard" Hot Country Songs chart. The song was written by Mike Eli and Blu Sanders. "Radio Waves" is an up-tempo song in which the male narrator is reflecting on a past relationship with regret. The narrator sings the song to former lover