Generally, radio waves have a near field and a far field. The antenna is horizontally polarized if it’s horizontal to the earth’s surface.Īre there any other critical features of a radio wave? An antenna is vertically polarized if the electric field is vertical to the earth’s surface. One of the key features is the orientation of the fields with the earth. What are some of the characteristics of a radio wave? According to Maxwell’s well-known equations, they support and regenerate one another along the way, but weaken over distance. These electromagnetic fields move at the speed of light (about 300 million meters per second or about 186,400 miles per second) through free space. Both oscillate at a specific frequency, and they travel together in a direction perpendicular to both fields (Fig. A radio wave is a combination of a magnetic field at a right angle to an electric field.
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