In the radar systems, an electromagnetic wave generated by the transmitter unit is transmitted
by means of an antenna and the reflected wave from the objects (echo) is received by the
same antenna and after processing of the returned signal, a visual indication is displayed on
indicators. After a radio signal is generated and emitted by a combination of a transmitter and
an antenna, the radio waves travel out in a certain direction in a manner similar to light or
sound waves. If the signals strike an object, the waves are reflected and the reflected waves
travel in all directions depending of the surface of the reflector. The term reflectivity refers to
the amount of energy returned from an object and is dependent on the size, shape and
composition of the object. A small portion of the reflected waves return to the location of the
transmitter originating them where they are picked up by the receiver antenna. This signal is
amplified and displayed on the screen of the indicators, e.g. PPI (Plan Position Indicator).
This simple approach can be achieved by means of many complex process including hardware
and software componen