Following are the frequency ranges used in satellite communications. See also optical bands.
L-band (390 MHz-1.55 GHz)
GPS satellites, satellite phones,
misc commsats,
SETI outer space exploration
S-band (1.55-5.2 GHz)
weather satellites, XM/Sirius radio
C-band (3-7 GHz)
misc GEO commsats, cable TV distribution,
satellite TV (large 7-10 ft. steerable dishes),
first band for communications satellites
X-band (8-12 GHz)
misc commsats
Ku-band (11-15 GHz)
TV network satellite distribution, misc commsats,
satellite TV (small 18" dishes)
Ka-band (18-40 GHz)
misc commsats, satellite phone backhaul
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