might have dated myself from two decades ago.
from the Global Hawk avionics description -
"Global Hawk has wide band satellite data links and line of sight data links developed by L3 Communications. The 'bulge' at the top front surface of the fuselage which gives Global Hawk its distinctive appearance, houses the 48in Ku-band wideband satellite communications antenna. Data is transferred by Ku-band satellite communications, X-band line-of-sight links and both Satcom and line of sight links at UHF-band."
freq bands below -
Designation Frequency Wavelength
ELF extremely low frequency 3Hz to 30Hz 100'000km to 10'000 km
SLF superlow frequency 30Hz to 300Hz 10'000km to 1'000km
ULF ultralow frequency 300Hz to 3000Hz 1'000km to 100km
VLF very low frequency 3kHz to 30kHz 100km to 10km
LF low frequency 30kHz to 300kHz 10km to 1km
MF medium frequency 300kHz to 3000kHz 1km to 100m
HF high frequency 3MHz to 30MHz 100m to 10m
VHF very high frequency 30MHz to 300MHz 10m to 1m
UHF ultrahigh frequency 300MHz to 3000MHz 1m to 10cm
SHF superhigh frequency 3GHz to 30GHz 10cm to 1cm
EHF extremely high frequency 30GHz to 300GHz 1cm to 1mm
and Ku
The Ku band is a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 11.7 to 12.7GHz. (downlink frequencies) and 14 to 14.5GHz (uplink frequencies).
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so it appears that modern avionics and satcom has caught up with the SHF band since Ku is clearly in the SHF. So I stand corrected.
Having said that - the SHF installation in the NAOC is a full capabilty ground station equivelant in a gyro-stablized installation which enables the aircraft to carry the full range of strategic communications which is signficantly more than the standard aircraft installation such as on the Global Hawk or U-2R.
More about that, I cannot say......