WW 2 Radar - letter band designations

P P stood for "previous" as in the German Würzburg (53 cm) and Freya (1.8 - 2 m) wavelengths 255 - 390 MHz L Search radar as developed was called L band for long wavelength 390 - 1550 MHz S Shorter wavelengths were used and called S band 1500 - 5200 MHz C C band was a compromise or combination of X and S bands 3900 - 6200 MHz X X band was developed for fire control (X marks the spot) 5200 - 10,900 MHz Ku Ku = frequencies under K band   K K band was introduced but absorbed by water vapour rain and fog K =kurtz (German for short) 10,900 - 36,000 MHz Ka Ka = frequencies above K band   Q   36,000 - 46,000 MHz V   46,000 - 56,000 MHz

A German photograph of a Freya, c. 1941 On top of the main structure is the IFF aerial	Tony Hill's magnificent low-level oblique showing the Würzburg paraboloid. R. V. Jones described this shot as "one of the great pictures of the war"	A lonely houde on the cliffs at Cap d'Antifer, near Bruneval. The arrow points to the small dot which Jones thought might be the elusive Würsburg radar	Pilot officer Manifold's low-level pictures of the site, revealing the two Freya Aerials