A new method using the “orbital angular momentum” of radio waves could potentially boost their information-carrying capability. This technique “permits many data streams to fit in the frequency spread currently used for just one” and could apply to radio, wi-fi, and television. The parts of the electromagnetic spectrum that are used for all three “are split up in roughly the same way, with a spread of frequencies allotted to each channel.” The three all contain a “limited amount of information-carrying capacity,” better known as bandwidth.
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