11 Facts About Radar

Radar is a detection system that uses radio waves to determine the distance (ranging), angle, and radial velocity of objects relative to the site.

Radar was developed secretly for military use by several countries in the period before and during World War II.

Radar obtained a patent for his detection device in April 1904 and later a patent for a related amendment for estimating the distance to the ship.

Radar obtained a British patent on 23 September 1904 for a full radar system, that he called a telemobiloscope.

Radar system has a transmitter that emits radio waves known as radar signals in predetermined directions.

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Radar signals are reflected especially well by materials of considerable electrical conductivity—such as most metals, seawater, and wet ground.

Radar receivers are usually, but not always, in the same location as the transmitter.

Radar relies on its own transmissions rather than light from the Sun or the Moon, or from electromagnetic waves emitted by the target objects themselves, such as infrared radiation.

Radar absorbing material, containing resistive and sometimes magnetic substances, is used on military vehicles to reduce radar reflection.

Radar beam follows a linear path in vacuum but follows a somewhat curved path in atmosphere due to variation in the refractive index of air, which is called the radar horizon.

Radar come in a variety of configurations in the emitter, the receiver, the antenna, wavelength, scan strategies, etc.