Which are the two bands on which radar operates?

Police radar transmits radio waves on a specific frequency, and the three frequency bands currently in use (in North America) are X-band, K-band, and Ka-band .

The different bands are L,S,C,X,K . The names of the radars originate from the days of WWII. L band radars operate on a wavelength of 15-30 cm and a frequency of 1-2 GHz. L band radars are mostly used for clear air turbulence studies.

X, K, and Ka band radar are simply names for different frequencies of police radar (just like different radio station names on FM radio) When your detector alerts you to one of these three radar bands, it has detected radar waves that fall within that particular band.

Space surveillance and early warning radars operate in the very high frequency (VHF) and ultrahigh frequency (UHF) bands where atmospheric attenuation and natural noise are nearly negligible.