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RADAR, the abbreviation of
RAdio Detection And Ranging, is a system that uses
radio waves to determine the distance, direction and radial velocity of objects
relative to the radar station. It is a radiodetermination method that is used
to track aircraft, ships,spacecraft, guided missiles, vehicles,
weather information and terrain.
In an adapted form it can also be used to remotely power a
covert listening device (bug),
in which case the backscattered signal carries
the intelligence.
The name RADAR was introduced as an acronym in 1940 by the US Navy, and has since become an anacronym as radar (all
lower case).
A radar system typically consists of a transmitter, a transmitting antenna,
a receiving antenna (which can be shared with the transmitter),
a receiver and a processor. The transmitter generates electromagnetic waves
in the radio or microwave domain, which can be continuous (CW) or pulsed.
Objects that are 'illuminated' by the transmitter, reflect these waves,
which are then picked up by the receiver. Depending on the type of radar,
a processor can then be used to determine the distance, direction, height
and speed of the object [1].
This section of the website contains a random selection of devices that do
not fit into any of the other categories, and that are somehow related to radar,
navigation and guidance systems.
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Radar-related items on this website
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Any links shown in red are currently unavailable.
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© Crypto Museum. Created: Sunday 15 January 2017. Last changed: Monday, 18 May 2026 - 11:29 CET.
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