radar and radar communication?

Question

definition..?
hw it works..?
and anything else you know about radar and radar communications..

Answer 1

Radar is a system that uses radio waves to detect, determine the distance or speed, objects such as aircraft, ships, rain and map them. Speed detection is measured by the amount of Doppler Effect frequency shift of the reflected signal. A transmitter emits radio waves, which are reflected by the target, and detected by a receiver, typically in the same location as the transmitter. Although the radio signal returned is usually very small, radio signals can easily be amplified, so radar can detect objects at ranges where other emission, such as sound or visible light, would be too weak to detect. Radar is used in many contexts, including meteorological detection of precipitation, air traffic control, police detection of speeding traffic, and by the military. The links below descrilbes how radar works in detail:

Answer 2

Radar Communication

Answer 3

RADAR is the sending of a signal to bounce it off an object, and receiving the reflection.
If you time the period between the transmission and the reception, and divide by the speed of light, you can work out how far away the object is.
If you're going to send a signal, why not send a question? The object can pick up the signal, and transmit a reply. The radar receives the reflection, which determines its distance, immediately followed by a reply from the object's "transponder", which gives information like its ID, its height above ground (for aircraft), and its type.

Answer 4

Radar is a radar ranging device...

It works by reflection and dopler shift..

As a communication device radar counld be used.
Any radio signal can be modulated and received.

Peter

Answer 5

http://en.wikipedia.org/wiki/Radar