RADAR

Radio Detection and Ranging (RADAR) is a way to detect and study far off targets by transmitting a radio pulse in the direction of the target and observing the reflection of the wave. Basic principle governing the functionality of radar is due to the properties of radiated electromagnetic energy. There are many types of active radar remote sensors. They include:

• - Doppler radar, commonly used to detect motion (motor vehicle/traffic applications),
• - Plan Position Indicators (PPI), used by air traffic controllers and weather forecasters,
• - Side-looking airborne radar (SLAR), originally developed for military reconnaissance in the early 1950s for all-weather, day/nigh
• ...

The block diagram of a primary Radar is shown below:

1. Transmitter

The radar transmitter produces microwave signal, which is typically short duration high-power RF- pulses of energy for a pulsed radar.

2. Receiver

The receiver demodulates the received reflected energy and analyzes the signal to find target parameters.

3. Display (Signal Processing)

The receiver sends the output to display, which shows the analyzed signal in an easily understandable user friendly manner.