| C-band |
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Information AboutC-band |
| CATEGORIES ABOUT C BAND | |
| microwave bands | |
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C band is a portion of the electromagnetic spectrum in the Microwave range of frequencies ranging from 4 to 8 GHz.Peebles, Peyton Z. Jr, (1998), ''Radar Principles'', John Wiley and Sons, Inc., p 20.. It was the first frequency band allocated for commercial ground-to-satellite communications. A typical C-band satellite uses 3.7 - 4.2 GHz for Downlink , and 5.925 - 6.425 Ghz for Uplink . C band is primarily used for open satellite communications, whether for full-time satellite TV networks or raw satellite feeds, although subscription Programming also exists. This use contrasts with Direct Broadcast Satellite , which is a completely closed system used to deliver subscription programming to small satellite dishes connected to proprietary receiving equipment. C band is highly associated with TVRO satellite reception systems, commonly called "big dish" systems since small receiving antennas are not optimal for C-band systems. Typical antenna sizes on C-band capable systems ranges from 7.5 to 12 feet (2.5 to 3.5 meters) on consumer satellite dishes, although larger ones also can be used. The 5.4GHz band (5.15-5.35/5.47-5.725/5.725-5.875 GHz) is used for IEEE 802.11a WIFI and cordless phone applications, leading to occasional interference with C-band weather radars. C BAND VARIANTS Slight variations of C Band frequencies are approved for use in various parts of the world.http://www.tech-faq.com/c-band.shtml NOTES }}} SEE ALSO |
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