The EM spectrum is generally divided into seven regions in order of decreasing wavelength and increasing energy and frequency, according to the University of Rochester. … Bands of radio waves. BandFrequency rangeWavelength rangeExtremely High Frequency (EHF)30 to 300 GHz1 mm to 1 cmWhat Are Radio Waves? | Live Science www.livescience.com › 50399-radio-waves