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Radio relay
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<p><a href="/facts/Radio_station/FLJVq8Ec">Radio stations</a> that cannot communicate directly due to distance, terrain or other difficulties sometimes use an intermediate radio relay station to relay the signals. A radio relay receives weak signals and retransmits them, often in a different direction, as a stronger signal. Examples include <a href="/facts/Airborne_radio_relay/H2ufT4Yk">airborne radio relay</a>, <a href="/facts/Microwave_radio_relay/bz9H9Ete">microwave radio relay</a>, and <a href="/facts/Communications_satellite/y5RXPMDT">communications satellite</a>. The <a href="/facts/American_Radio_Relay_League/NXFGqIPA">American Radio Relay League</a> was founded for this purpose but did not change its name when this became a less important part of its work. </p>