When teaching networking, we often use the example of throwing a rock into a river to teach the concept of attenuation. Think of going down to the water and throwing in a rock. You see an epicenter where the rock went in and waves rippling out from that epicenter. The farther you get from the center, the weaker the waves get. The concentric circles that you see are similar to the radio waves as they propagate away from the antenna.
When the antenna propagates the high-frequency AC signal into the air, it forms radio waves. These radio waves propagate, or move away, from the source in a straight line in all directions. Just imagine the rock going into the water. Read more →
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