G band

This article is about radio frequency range. For chromosome staining, see G banding.

G band

NATO G band
Frequency range	4 – 6 GHz
Wavelength range	7.5 – 5 cm
Related bands	C (IEEE) SHF (ITU)
IEEE G band
Frequency range	110 – 300 GHz
Wavelength range	2.73 – 1 mm
Related bands	mm (IEEE) EHF (ITU)

NATO G band

The NATO G band is the obsolete designation given to the radio frequencies from 4 000 to 6 000 MHz (equivalent to wavelengths between 7.5 and 5 cm) during the cold war period. Since 1992 frequency allocations, allotment and assignments are in line to NATO Joint Civil/Military Frequency Agreement (NJFA). However, in order to identify military radio spectrum requirements, e.g. for crises management planning, training, Electronic warfare activities, or in military operations, this system is still in use.

NATO Radio spectrum designation
LATEST SYSTEM			ALTERNATIVE SYSTEM
BAND	FREQUENCY (MHz)		BAND	FREQUENCY (MHz)
A	0 – 250		I	100 – 150
B	250 – 500		G	150 – 225
C	500 – 1 000		P	225 – 390
D	1 000 – 2 000		L	390 – 1 550
E	2 000 – 3 000		S	1 550 – 3 900
F	3 000 – 4 000		C	3 900 – 6 200
G	4 000 – 6 000		X	6 200 – 10 900
H	6 000 – 8 000		K	10 900 – 36 000
I	8 000 – 10 000		Ku	10 900 – 20 000
J	10 000 – 20 000		Ka	20 000 – 36 000
K	20 000 – 40 000		Q	36 000 – 46 000
L	40 000 – 60 000		V	46 000 – 56 000
M	60 000 – 100 000		W	56 000 – 100 000

IEEE G band

The modern IEEE G band covers frequencies from 110 to 300 GHz (2.7 mm—1.0 mm) and includes the 118 GHz oxygen and 183 GHz water lines used for atmospheric sounding. It is also referred to as mm in the 2002 IEEE Standard for Letter Designations for Radar-Frequency Bands.