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||50 to 75 GHz
The V band (vee-band) of the electromagnetic spectrum
ranges from 50 to 75 GHz. The V band is not heavily used,
except for millimeter wave radar research and other kinds of
scientific research. It should not be confused with the
600–1000 MHz range of Band-V (band-five) of the UHF frequency range.
The V band is also used for high capacity terrestrial millimeter
wave communications systems. In the United States, the Federal Communications
Commission has allocated the frequency band from 57 to
64 GHz for unlicensed wireless systems. These
systems are primarily used for high capacity, short distance (less
than 1 mile) communications. In addition, frequencies at 70, 80,
and 90 GHz have been allocated as "lightly licensed" bands for
multi-gigabit wireless communications. All communications links in
the V band require unobstructed
line of sight between the transmit and receive point, and rain fade must be taken
into account when performing link budget analysis.
On Dec. 15, 1995 the V band at 60 GHz was used by the world's
first crosslink communication between satellites in a
constellation. This communication was between the U.S. Milstar 1
and Milstar 2 military satellites.
The microwave spectrum is usually defined as electromagnetic
energy ranging from approximately 1 GHz to 100 GHz in
frequency, but older usage includes lower frequencies. Most common
applications are within the 1 to 40 GHz range. Microwave
frequency bands, as defined by the Radio Society of Great
Britain (RSGB), are shown in the table below:
Footnote: P band is sometimes incorrectly used for Ku Band. "P"
for "previous" was a radar band used in the UK ranging from 250 to
500 MHz and now obsolete per IEEE Std 521, see and . For other
definitions see Letter Designations of