This is a great question.  We have mentioned “dual band amplifiers” in the past.  When we talk about dual band we are generally referring to an amplifier.  This means the amplifier is built to amplify/enhance signals for both the 800 MHz cellular or the 1900 MHz PCS frequencies.

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Each frequency range has a band designator and each range of frequencies behaves differently and performs different functions. The frequency spectrum is shared by civil, government, and military users of all nations according to International Telecommunications Union (ITU) radio regulations.

For communications purposes, the usable frequency spectrum now extends from about 3Hz to about 300GHz. There are also some experiments at about 100THz where research on laser communications is taking place but we won’t discuss this now. This range from 3Hz to 300GHz has been split into regions.

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