Standard Frequency Assignments

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TABLE B.1 IEEE Standard Letter Designations for Radar Bands Used by the EESS Community and Their Comparison to the ITU Allocations

International Table
Band DesignationNominal Frequency RangeSpecific Frequency Ranges for Radar Based on ITU Assignments (see Notes 1, 2)
Region 1Region 2Region 3
HF3-30 MHz(Note 3)
VHF30-300 MHzNone138-144 MHz223-230 MHz
216-225 MHz
(See Note 4)
UHF300-1000 MHz (Note 5)420-450 MHz (Note 4)
890-942 MHz (Note 6)
L1-2 GHz1215-1400 MHz
S2-4 GHz2300-2500 MHz
2700-3600 MHz2700-3700 MHz
C4-8 GHz4200-4400 MHz (Note 7)
5250-5850 MHz5250-5925 MHz
X8-12 GHz 8.5-10.68 GHz 
Ku12-18 GHz13.4-14 GHz
15.7-17.7 GHz
K18-27 GHz24.05-24.25 GHz24.05-24.25 GHz24.05-24.25 GHz
24.65-24.75 GHz
(Note 8)
Ka27-40 GHz 33.4-36 GHz 
V40-75 GHz 59-64 GHz 
W75-110 GHz 76-81 GHz 
 92-100 GHz 
mm (Note 9)110-300 GHz 126-142 GHz 
 144-149 GHz 
231-235 GHz
238-248 GHz
(Note 10)

NOTES:

1. These International Telecommunication Union (ITU) frequency allocations are from the table contained in Article S5 of the ITU Radio Regulations, 2002 edition, reaffirmed in 2009 (see https://standards.ieee.org/findstds/standard/521-2002.html). The ITU defines no specific service for radar, and the frequency assignments listed are derived from those radio services that use radiolocation. The frequency allocations listed include those for both primary and secondary service. The listings of frequency assignments are included for reference only and are subject to change.

2. The specific frequency ranges for radiolocation are listed in the National Telecommunications and Information Administration (NTIA) Manual of Regulations & Procedures for Federal Radio Frequency Management, Chapter 4. The NTIA manual (known as the Redbook) can be downloaded from http://www.ntia.doc.gov/osmhome/redbook/redbook.html.

3. There are no official ITU radiolocation bands at HF. So-called HF radars might operate anywhere from just above the broadcast band (1.605 MHz) to 40 MHz or higher.

4. Frequencies from 216-450 MHz were sometimes called P-band.

5. The official ITU designation for the ultra high frequency band extends to 3000 MHz. In radar practice, however, the upper limit is usually taken as 1000 MHz, L- and S-bands being used to describe the higher UHF region.

Специально для тебя, дорогая. Он стал ждать, когда его компьютер разогреется, и Сьюзан занервничала. Что, если Хейл захочет взглянуть на включенный монитор «ТРАНСТЕКСТА». Вообще-то ему это ни к чему, но Сьюзан знала, что его не удовлетворит скороспелая ложь о диагностической программе, над которой машина бьется уже шестнадцать часов.

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