H band

This article is about the radio band. For the region of the sarcomere, see sarcomere.

ITU Radio Band Numbers 1 2 3 4 5 6 7 8 9 10 11 12 ITU Radio Band Symbols ELF SLF ULF VLF LF MF HF VHF UHF SHF EHF THF NATO Radio bands A B C D E F G H I J K L M IEEE Radar bands HF VHF UHF L S C X Ku K Ka Q V W D

H band can refer to two different regions of the electromagnetic spectrum, in the radio and near-infrared.

Radio

The H band is the range of radio frequencies from 6 GHz to 8 GHz in the electromagnetic spectrum. This is equal to wave lengths between 5 cm and 3.75 cm. The H band is in the SHF range of the radio spectrum.

The modern H band lies in the C band (4–8 GHz) of the older IEEE classification system.

Infrared astronomy

Atmospheric windows in the infrared. The H band is the transmission window centred on 1.65 micrometres

In infrared astronomy, the H band refers to an atmospheric transmission window centred on 1.65 micrometres with a FWHM width of 0.35 micrometres (in the near-infrared).