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