John Hutchison & Ronnie Milione

The Philadelphia Experiment Revisited!

Coming Late Summer of 2006

Let's talk about RADAR

Figure 1: radar principle

The electronics principle on which radar operates is very similar to the principle of sound-wave reflection. If you shout in the direction of a sound-reflecting object (like a rocky canyon or cave), you will hear an echo. If you know the speed of sound in air, you can then estimate the distance and general direction of the object. The time required for a return echo can be roughly converted to distance if the speed of sound is known.

Radar uses electromagnetic energy pulses in much the same way, as shown in figure 1. The radio-frequency (rf) energy is transmitted to and reflects from the reflecting object. A small portion of the energy is reflected and returns to the radar set. This returned energy is called an ECHO, just as it is in sound terminology. Radar sets use the echo to determine the direction and distance of the reflecting object.

Radar is an acronym for

Radio (Aim) Detecting And Ranging
The word �Aim� was inserted during the time of the World War II approximately.
Later, it was left out again since RADAR doesn't concern only aims, however.