Radar (Radio Detection and Ranging) is a device that is used to find the distance of an object, the shape and type of the object that is found. It uses the principle sending radio waves and finding the time it takes to receive that radio wave back. This helps the radar to find out the distance between the object and the radar. There is a transmitter and a receiver which does the function. Upon sending thousands of radio waves in different directions it is possible to draw the shape of the object that is being detected by using the returned radio waves. This is what is done with the radar. Now-a-days there are devices that generate radio waves of the same frequency as that of the radar so that the radar is confused by receiving lots of radio waves.Such a device is called radar jammer. <a href=”http://www.intota.com/multisearch.asp?strSearchType=all