The detail links in the table below open in the companion web site, which is also operated by this site.
|Frequency Band||Freq Usage|
|HF Band||3MHz - 30MHz||-|
|VHF Band||30MHz - 300MHz||-|
|UHF Band||300MHz - 1.0GHz||-|
|L Band||1.0GHz - 2.0GHz||-|
|S Band||2.0GHz - 4.0GHz||-|
|C Band||4.0GHz - 8.0GHz||C Band detail|
|I Band||8.0GHz - 10.0GHz||-|
|X Band||8.0GHz - 12.0GHz||X Band detail|
|Ku Band||12.0GHz - 18.0GHz||Ku Band detail|
|K Band||18.0GHz - 27.0GHz||K Band detail|
|Ka Band||27.0GHz - 40.0GHz||Ka Band detail|
|Q Band||36.0GHz - 46.0GHz||-|
Editor note; As a general statement the United States government no longer uses the letter designations shown in the table above. The US government considers the designations to be legally ambiguous [if memory serves]. It seems that in some cases the military still uses many of these designations, but many of those documents are not updated for years at a time. I have a note on another page where I indicate that: Letter designators of radio frequency bands are imprecise, deprecated, and legally obsolete. However I did not make note of which government agency said that, although it would seem that the FCC would be the agency putting out a statement like that.
Radar Frequency Bands