The term SHORTWAVE describes a specific frequency range
(2-30MHz) that enables users with small and moderate radio
transmitters to communicate worldwide without the need for
a satellite or cable service.
Worldwide coverage is achieved
by the reflection of shortwaves in the upper atmosphere (
ionosphere). Around the world shortwave radio is an very
important means to distribute news, emails and emergency
information to even remote areas on the globe.
range is used by military (NATO), police, embassies, red
cross (NGO’s), amateur
radio, radio broadcasting,
baby phones, etc..
Usage of shortwave frequencies is regulated
by the international telecom union (ITU). Several frequency
sub ranges are dedicated
to services, like broadcasting and amateur radio use. Nobody
else is allowed to use the same allocation or cause interference
to these primary allocated radio services. Even no national
authority is allowed to allocate differently on national
level, since radio propagation will not stop at the countries
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