[Allocation of Radio Spectrum]

Letter Designations of Microwave Bands

Different authors have used different frequency boundaries for letter designation of the microwave bands. Three of those are shown here:
DESIGNATION FREQUENCY (MHz)
Ref. Data for Radio Engin. US Navy RSGB
I
100 - 150
G
150 - 225
P 225 - 390 225 - 390
L 390 - 1,550 390 - 1,550 1,000 - 2,000
S 1,550 - 5,200 1,550 - 3,900 2,000 - 4,000
C 3,900 - 6,200 3,900 - 6,200 4,000 - 8,000
X 5,200 - 10,900 6,200 - 10,900 8,000 - 12,000
K
10,900 - 36,000
10,900 - 36,000
18,000 - 26,500

Ku 15,350 - 17,250 15,250 - 17,250 12,000 - 18,000



Ka 33,000 - 36,000 33,000 - 36,000 26,500 - 40,000
Q 36,000 - 46,000 36,000 - 46,000 33,000 - 50,000
U

40,000 - 60,000
V 46,000 - 56,000 46,000 - 56,000
W 56,000 - 100,000 56,000 - 100,000

First columns from Reference Data for Radio Engineers, Fifth Edition, Howard W. Sams & Co., Inc., Indianapolis, Indiana: 1970.

The columns headed "US Navy" were copied from US Navy Submarine Communications Spectrum at http://mintaka.spawar.navy.mil/ftp/pmw173/APX-C.pdf.

The columns headed "RSGB" were derived from a chart posted by the Radio Society of Great Britain at http://www.rsgb.org.uk/society/uwinfo/uwfaq6.htm

Scott Hudson posted yet another chart of letter designations with different boundaries than shown above.


John Neuhaus, WA2JXE, <john@jneuhaus.com>
Fri, Aug 27, 1999

Disclaimer: John Neuhaus makes no warranty as to the accuracy or completeness of the information on these pages. All risk relating to its use is assumed by the user.