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James

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  1. Introduction The electromagnetic spectrum includes waves of Extremely Low Frequency (ELF) of 1Hz through to visible light between 400 and 790 THz and further up to X-rays and Gamma rays in the order of exa-Hertz (EHz, 10 to the power of 18 Hertz). Radio Frequency (RF) is defined as the range of frequencies of the electromagnetic spectrum between 3kHz and 300GHz. The International Telecommunications Union (ITU) divides this band of radio frequencies into several smaller ranges (called bands) including, as examples, the Very High Frequency (VHF) band from 30 MHz to 300 MHz, and the Ultra Hi
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