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Comparing Narrowband and Wideband Channels (.PDF Download)

Bandwidth is limited at all frequencies. This holds true whether we’re discussing those in the kilohertz range used for amplitude-modulated (AM) radio broadcasting; microwaves and millimeter waves for commercial and military radar systems; or those frequencies bands with the shortest-wavelength electromagnetic (EM) signals, including infrared (IR), ultraviolet (UV), x-rays, and gamma rays.

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