Radio Detection and Ranging

RADAR is an acronym for Radio Detection and Ranging. It is most popularly being used in defense and civil aviation to track Airplane, Helicopters, etc. At present time it is becoming an eye for every defense and civil aviation system. Suppose there is thick fog and the pilot is not able to see the runway to land a jumbo jet. Then what will happen? If you cannot see where you are going, how can you hope to land safely? Here RADAR plays its importance. Air traffic controllers (ATC) get around this difficulty using RADAR, a way of “seeing” that uses microwaves or high-frequency radio waves. RADAR was mainly developed to detect enemy aircraft during World War II, but now its application has been spread from weather forecasting to police speed-detector guns.

What is RADAR?

Radio Detection and Ranging (RADAR)

Radio Detection and Ranging (RADAR) Display

It is based on the use of radio waves. RADAR sends high-frequency radio signals like any wireless network. The radio signals are sent towards as a form of short pulses which may be reflected by objects in their path, in part reflecting back to the RADAR. When these waves intercept rapidly, part of the energy or radio signal is scattered back to the RADAR. The concept of RADAR is similar to hearing an echo from passive (non-radiating source that does not emit any radio signal) or active (radiating source that emit Radio signal like RF tags) .  By hearing the echo or reflected radio signal RADAR is able to tell where the interception is occurring. Nowadays LIDAR is using the similar principle for detection of objects.