New material! BandFrequency RangeOrigin of NameS2 to 4 GHzS for “short” wave. Don’t confuse this with the short wave radio band, which is much lower in frequencyC4 to 8 GHzC for “compromise” between S and X band.X8 to 12 GHzUsed in WW II for fire control, X for cross (as in crosshair)Ku12 to 18 GHzKu for “kurz-under”.Frequency Letter Bands – Microwaves 101 www.microwaves101.com › encyclopedias › frequency-letter-bands