Shortwave radio
Videos
Shortwave radio is radio transmission using radio frequencies in the shortwave bands. There is no official definition of the band range, but it always includes all of the high frequency band, which ex
Grundig Satellit 400 solid-state, digital shortwave receiver, c. 1986
Radio amateurs carried out the first shortwave transmissions over a long distance before those of Guglielmo Marconi.
National Panasonic R3000 analog shortwave radio receiver, c. 1965
Portable shortwave receiver's digital display tuned to the 75–meter band
Skywave
Videos
In radio communication, skywave or skip refers to the propagation of radio waves reflected or refracted back toward Earth from the ionosphere, an electrically charged layer of the upper atmosphere. Si
Shortwave radio
…ionosphere. Therefore, short waves directed at an angle into the sky can be reflected back to Earth at great distances, beyond the horizon. This is called skywave or "skip" propagation. Thus shortwave radio can be used for communication over very long distances, in contrast to radio waves of higher frequency…
Radio waves (black) reflecting off the ionosphere (red) during skywave propagation. Line altitude in this image is significantly exaggerated and not to scale.
Example of F2 and Sporadic-E Propagation on the 10-meter band taken from PSK Reporter (Mins = Minutes).