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