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Allocation and regulation of the electromagnetic spectrum into radio frequency bands
Frequency allocation
(or
spectrum allocation
) is the part of
spectrum management
dealing with the designation and regulation of the
electromagnetic spectrum
into
frequency bands
, normally done by governments in most countries.
[1]
Because
radio propagation
does not stop at national boundaries, governments have sought to harmonise the allocation of RF bands and their standardization.
ITU definition
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The
International Telecommunication Union
defines frequency allocation as being of "a given
frequency band
for the purpose of its use by one or more terrestrial or space radiocommunication services or the
radio astronomy service
under specified conditions".
[2]
Frequency allocation
is also a special term, used in national
frequency administration
. Other terms are:
ITU-terms pertaining to frequency regulation
Frequency
distribution to:
|
ITU languages
|
ITU RR
(article)
|
French
|
English
|
Spanish
|
Arabic
|
Chinese
|
Russian
|
Radiocommunication services
|
attribution
(attribuer)
|
allocation
(to allocate)
|
atribucion
(atribuir)
|
|
?分
|
распределение
(распределять)
|
1.16
|
Regions or countries
|
allotisement
(allotir)
|
allotment
(to allot)
|
adjudicacion
(adjudicar)
|
|
分配
|
выделение
(выделять)
|
1.17
|
Radio stations
|
assignation
(assigner)
|
assignment
(to assign)
|
asignacion
(asignar)
|
|
指配
|
присвоение
(присваивать)
|
1.18
|
Bodies
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Several bodies set standards for frequency allocation, including:
To improve harmonisation in spectrum utilisation, most service allocations are incorporated in national Tables of Frequency Allocations and Utilisations within the responsibility of the appropriate national administration. Allocations are:
- primary
- secondary
- exclusive or shared utilization, within the responsibility of national administrations.
Allocations of military usage will be in accordance with the ITU Radio Regulations. In NATO countries, military mobile utilizations are made in accordance with the
NATO Joint Civil/Military Frequency Agreement
(NJFA).
Examples
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]
Some of the bands listed (e.g., amateur 1.8?29.7 MHz) have gaps / are not continuous allocations.
Common frequencies
[3]
Source
|
Frequency (MHz)
|
Typical radiated
power (kW)
|
Meters
(approx)
|
Longwave
BCB
(EU)
|
0.150?0.285
|
320
|
|
AM
BCB
(EU & J)
|
0.525?1.605
|
500
|
630
|
AM
BCB
(US)
|
0.530?1.710
|
50
|
|
Amateur
|
1.8?29.7
|
0.16 (mobile)
|
15
|
Citizens band
|
26.9?27.4
|
0.004
|
12
|
Amateur
|
28?30
|
0.2 (mobile)
|
10
|
Land mobile
|
29?54
|
0.1
|
|
Amateur
|
50?54
|
0.2 (mobile)
|
6
|
TV low VHF
|
54?88
|
100
|
|
Land mobile (EU)
|
65?85
|
0.1
|
|
FM
BCB
(J)
|
76?90
|
44
|
|
FM
BCB
(US & EU)
|
88?108
|
105
|
|
Aircraft
|
108?136
|
1
|
|
Land mobile (EU)
|
120?160
|
0.1
|
|
Land mobile
|
132?174
|
18?100
|
|
Land mobile (J)
|
142?170
|
|
|
Amateur
|
144?148
|
0.2 (mobile)
|
2
|
TV high VHF
|
174?216
|
316
|
|
Land mobile
|
216?222
|
0.2
|
|
Amateur
|
222?225
|
0.1 (mobile)
|
1.25
|
Land mobile (J)
|
335?384
|
|
|
Land mobile
|
406?512
|
0.1
|
|
Land mobile (J)
|
450?470
|
|
.70
|
Amateur
|
430?450
|
0.1 (mobile)
|
|
TV UHF
|
470?806
|
5000
|
|
Land mobile
|
806?947
|
0.035
|
.33
|
Cellular AMPS
|
806?947
|
0.003
|
.33
|
Amateur
Land mobile
GPS
|
1200?1600
|
|
.23
|
Cellular PCS
|
1700?2000
|
0.003
|
|
ISM
Bluetooth
Wi-Fi
|
2400?2500
|
0.0000025
|
|
- BCB is an abbreviation for
broadcast band
, for commercial radio news and music broadcasts.
See also
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References
[
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External links
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