Question

‘RADAR’ stands for
1. Radio Detection and Ranging
2. Ready Advanced Appliance for Ranging
3. Range Detection Appliance for Airplane Ranging
4. Ready Advanced Airplane Ranging

Answer 1

Correct Answer - Option 1 : Radio Detection and Ranging

The correct answer is Radio Detection and Ranging.

• RADAR stands for Radio Detection and Ranging System.
  • It is basically an electromagnetic system used to detect the location and distance of an object from the point where the RADAR is placed.
  • It works by radiating energy into space and monitoring the echo or reflected signal from the objects.
  • It operates in the UHF and microwave range.
    • Generally, it works in the microwave area of the electromagnetic spectrum that is calculated in hertz when frequencies extend from 400 MHz to 40 GHz.
• Radar is an electromagnetic sensor, used to notice, track, locate, and identify different objects which are at certain distances.
  • Here the targets are nothing but ships, aircraft, astronomical bodies, automotive vehicles, spacecraft, rain, birds, insects, etc.
• The essential parts of this system include the following:
  • Transmitter
  • Receiver
  • Antenna
  • Waveguides
  • Duplexer
  • Threshold Decision