Radar History

Radar Definition

• "a system for detecting the direction, range, or presence of aircraft, ships. or other moving   objects, by sending out pulses of hight frequency electromagnetic waves".- Concise Oxford Dictionary.
• "an electronic detection device or active system for locating or tracking a distant object by measuring elapsed circuit time of travel of ultrahigh frequency radio waves of known propagation velocity emitted from a transmitter and reflected back by the object"

History

1886 - Heinrich Hertz demonstrated the reflection of radio waves.

1904 - Cristian Hulsmeyer develoved the first radar " Telemobiloscope"

Telemobiloscope - was a transmitter-receiver system for detecting distant metallic objects by means of electrical waves.

1940 - Batle of Britain a radar system called chain home alerted the British of impending German air raids

It was during world war II that the term RADAR came to existence,being abbreviation for
RAdio Detection And Ranging

Radar Theory

• A signal is transmitted, it bounces off an object and it is later received by the receiver.
• Sound echo's off a wall.
• Radars don't use sound as a signal.
• It uses electromagnetic waves called radio waves and microwaves.

Please reads Radar Theory