They’d been around commercially since 1947. And generally, they operated at a specific frequency: 2.45 GHz. Despite heavy shielding, microwave ovens’ powerful emissions could sometimes interfere with neighboring frequencies, so it was decided that they should be given a few megahertz of space in both directions .
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1. Introduction Electromagnetic wave spectrumFrequency bandWavelengthRadio wavesVery high frequency (VHF) (30–300 MHz)10–1 mMicrowavesUltrahigh frequency (UHF) (300–3000 MHz)(100–10 cm)P band (230 MHz–1 GHz)130–30 cmL band (1–2 GHz)30–15 cmIntroductory Chapter: RF/Microwave Applications | IntechOpen www.intechopen.com › chapters
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