Electonic Engineers Notebook

Frequencies


Frequency bands How the spectrum is used
Specific systems  


Frequency Bands

3 - 30kHz

Very low frequency VLF

30 - 300kHz

Low frequency LF

300 - 3000kHz

Medium frequency MF

3 - 30MHz

High frequency HF

30 - 300MHz

Very high frequency VHF

0.3 - 3GHz

Ultra high frequency UHF

3 - 30GHz

Super high frequency SHF

30 - 300GHz

Extremely high frequency EHF

300GHz - 429THz

Infrared

429 - 750THz

Visible Light

750THz - ~300eV

Ultraviolet

GHz

Old

New

0.5 - 1.0

 

C

1.0 - 2.0

L

D

2.0 - 3.0

S

E

3.0 - 4.0

S

F

4.0 - 6.0

C

G

6.0 - 8.0

C

H

8.0 - 10.0

X

I

10.0 - 12.4

X

J

12.4 - 18.0

Kn

J

18.0 - 20.0

K

J

20.0 - 26.5

K

K

26.5 - 40.0

Ka

K

So how is the Spectrum used?

150-290kHz Longwave broadcast
550-1640kHz AM broadcast (107 Channels 10kHz spacing)
3-30MHz International broadcasting band
54-72MHz VHF television (channels 2-4)
76-88MHz VHF television (channels 5-6)
88-108MHz FM broadcast
174-216MHz VHF television (channels 7-13)
470-890MHz UHF television (channels 14-83)
0.96-1.215GHz Aeronavigation
1.2276GHz L2 GPS military downlink
1.35-1.4GHz Military comms/radar
1.4-1.71GHz Miscellaneous comms/radar
1.435-1.535GHz L-band telemetry
1.575GHz L1 GPS military and civil downlink
1.71-1.85GHz Military comms (troposcatter/telemetry)
1.85-2.2GHz Commercial comms and private line of sight
2.45GHz Microwave ovens
2.45-2.69GHz Commercial comms/radar
2.5-2.69GHz Instructional television
2.7-2.9GHz Military radar (airport surveillance)
2.9-3.7GHz Miscellaneous radar
2.9-3.1GHz Maritime navigation radar
3.7-4.2GHz Commercial satellite comms downlink
4.2-4.4GHz Radar altimeter
4.4-4.99GHz Military comms (troposcatter)
5-5.25GHz Commercial microwave landing system
5.25-5.925GHz Miscellaneous radars
5.35-5.47GHz Weather radar
5.925-6.425GHz Commercial satellite comms uplink
6.425-7.125GHz Commercial comms
6.875-7.125GHz Mobile television links
7.125-7.25GHz Military line of sight comms
7.25-7.75GHz Military satellite comms downlink
7.75-7.9GHz Military line of sight comms
7.9-8.4GHz Military satellite comms uplink
8.5-10.55GHz Miscellaneous radars
9-9.2GHz Precision approach radar
9.3-9.5GHz Weather radar and maritime navigation radar
10.525GHz Police radar
10.55-10.68GHz Commercial mobile comms (line of sight and electronic news gathering)
10.7-13.25GHz Commercial comms
10.7-11.7GHz Common carrier line of sight comms
11.7-12.2GHz Commercial satellite comms downlink
12.2-12.7GHz Direct broadcast satellite downlink and private comms
12.75-13.25GHz Electronic news gathering and line of sight comms
13.25-14GHz Miscellaneous radars and satellite comms
14-14.5GHz Commercial satellite comms uplink
14.5-15.35GHz Military comms (line of sight - mobile - tactical)
15.4-15.7GHz Aeronavigation
15.7-17.7GHz Miscellaneous radars
17.3-17.8GHz Direct broadcast satellite uplink
17.7-20.2GHz Commercial comms
17.7-19.7GHz Common carrier line of sight comms
18.36-19.04GHz Private line of sight comms
20.0-21.2GHz Military satellite comms
21.2-24GHz Miscellaneous comms
24.15GHz Police radar
24.25-25.25GHz Navigation radar
25.25-27.5GHz Military comms
27.5-30GHz Commercial comms
30-31GHz Military satellite comms
31-31.2GHz Commercial comms
31.8-33.4GHz Navigation radar
33.4-36GHz Miscellaneous radar
36-38.6GHz Military comms
38.6-40GHz Commercial comms


Some Specific Systems

Cordless Phones
CT2 - UK analogue cordless phone standard. 864 - 868MHz
DECT - European digital standard. 1.88 - 1.9GHz

Cellular Radio
GSM Uplink 890 - 915MHz. Downlink 935 - 960MHz
DCS1800 Uplink 1.71 - 1.785GHz. Downlink 1.805 - 1.88GHz

Wireless LANs
The IEEE 802.11 standard targets professional and wireless LAN applications. Two other standards, Bluetooth and Shared Wireless Access Protocol (SWAP), target low cost consumer markets. All operate in the 2.4GHz spectrum (802.11 has a high data rate 5GHz option).


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Last updated July 16, 2000

© 2000 Michael Wells