microwave radiation

Electromagnetic radiation generally in the frequency range between 300 MHz and 300 GHz (free-space wavelengths between 1 and 1000 mm).
Within these frequencies lie the UHF, SHF, and EHF radio frequency bands. Radars operate at microwave frequencies.

Electromagnetic radiation having wavelengths between approximately 1 mm and 1 m (corresponding to 0.3- and 300-GHz frequency) bounded on the short-wavelength side by far infrared (< 1 mm) and on the long-wavelength side by very high frequency radio waves (> 1 m).