I band (NATO)

The NATO I band is the obsolete designation given to the radio frequencies from 8,000 to 10,000 MHz (equivalent to wavelengths between 3.75 and 3 cm) during the Cold War period. Since 1992, frequency allocations, allotment and assignments are in line with the NATO Joint Civil/Military Frequency Agreement (NJFA).^[1] However, in order to identify military radio spectrum requirements, e.g. for crisis management planning, training, electronic warfare activities, or in military operations, this system is still in use.

NATO LETTER BAND DESIGNATION[citation needed]						BROADCASTING BAND DESIGNATION [citation needed]
NEW[when?] NOMENCLATURE			OLD[when?] NOMENCLATURE
BAND	FREQUENCY (MHz)		BAND	FREQUENCY (MHz)
A	0 – 250		I	100 – 150		Band I 47 – 68 MHz (TV)
						Band II 87.5 – 108 MHz (FM)
			G	150 – 225		Band III 174 – 230 MHz (TV)
B	250 – 500		P	225 – 390
C	500 – 1 000		L	390 – 1 550		Band IV 470 – 582 MHz (TV)
						Band V 582 – 862 MHz (TV)
D	1 000 – 2 000
			S	1 550 – 3 900
E	2 000 – 3 000
F	3 000 – 4 000
G	4 000 – 6 000		C	3 900 – 6 200
H	6 000 – 8 000		X	6 200 – 10 900
I	8 000 – 10 000
J	10 000 – 20 000		Ku	10 900 – 20 000
K	20 000 – 40 000		Ka	20 000 – 36 000
L	40 000 – 60 000		Q	36 000 – 46 000
			V	46 000 – 56 000
M	60 000 – 100 000		W	56 000 – 100 000
US- MILITARY / SACLANT[citation needed]
N	100 000 – 200 000
O	100 000 – 200 000

NATO I band

Frequency range	8–10 GHz
Wavelength range	3.75–3 cm
Related bands	X (IEEE) SHF (ITU)