- These terms should not be confused with downstream and upstream.
In satellite telecommunication, a downlink is the link from a satellite down to one or more ground stations or receivers, and an uplink is the link from a ground station up to a satellite. Some companies sell uplink and downlink services to television stations, corporations, and to other telecommunication carriers. A company can specialize in providing uplinks, downlinks, or both.
The following table shows the main frequency bands used for satellite links.
| Frequency Band | Downlink | Uplink |
| C | 3,700-4,200 MHz | 5,925-6,425 MHz |
| Ku | 11.7-12.2 GHz | 14.0-14.5 GHz |
| Ka | 17.7-21.2 GHz | 27.5-31.0 GHz |
The C band is the most frequently used. The Ka and Ku bands are reserved exclusively for satellite communication but are subject to rain attenuation. Some satellites carry transponders for both C and Ku bands.
| LAST UPDATED: |
28 May 2007
|
 |
Read more about downlink and uplink:
|


 |
Do you have something to add to this definition? Let us know.
Send your comments to techterms@whatis.com
|

');
// -->
 |
 |
|  |
RELATED CONTENT
 |
Wireless rate negotiations: How to get the best deal
Wireless negotiations require preparation. Companies must assemble the right team to assess their needs and form a bargaining strategy.
|
 |
WiMAX tutorial
This tutorial explains WiMAX technology, applications and terminology. It also provides an overview of WiMAX services, performance, security and...
|
 |
WiMAX devices
WiMAX devices will become more readily available as carriers deploy widespread WiMAX service.
|
|
 |
 |
|  |
RELATED GLOSSARY TERMS
| Terms from Whatis.com − the technology online dictionary |
 |
4G
(SearchMobileComputing.com)
4G is the short term for fourth-generation wireless, the stage of broadband mobile communications that will supercede the third generation (3G) of...
|
 |
802.16c
(SearchMobileComputing.com)
|
|

|