Radio Frequencies BandApprox. Range of Wavelengths (cm)Approximate FrequenciesS15 – 7.52 – 4 GHzC7.5 – 3.754 – 8 GHzX3.75 – 2.48 – 12 GHzK2.4 – 0.7512 – 40 GHzBasics of Space Flight – Solar System Exploration: NASA Science solarsystem.nasa.gov › basics › chapter6-3