C band

C band

C band is a name given to certain portions of the electromagnetic spectrum, as well as a range of wavelengths of light, used for communications. The IEEE C band and its variations, in particular, are microwave ranges used for certain satellite television broadcasts, and by some Wi-Fi devices, cordless phones, and weather radars. For satellite communications, the lower frequencies used by C Band perform better under adverse weather conditions than the Ku band or Ka band frequencies. [ [http://www.tech-faq.com/c-band.shtml What is C Band] page from tech-faq (accessed Aug. 14, 2008)]

NATO C band

The NATO C band is that portion of the electromagnetic spectrum between 500 MHz and 1000 MHz.

IEEE C band

The IEEE 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 Wi-Fi 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.



Optical communications C band

"C band" is also used in optical communications to refer to the wavelength range 1530 nm to 1565 nm.

See also

*Big ugly dish
*Communications satellite
*Satellite dish
*Television receive-only
*4DTV

Notes


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Band of Brothers (TV miniseries) — Band of Brothers Genre War Directed by …   Wikipedia

  • Band Aid (band) — Band Aid was a British and Irish charity supergroup, founded in 1984 by Bob Geldof and Midge Ure in order to raise money for famine relief in Ethiopia by releasing the record Do They Know It s Christmas? for the Christmas market. The single… …   Wikipedia

  • Band — (von althochdeutsch band, gebildet zu binden) hat männliches oder sächliches grammatisches Geschlecht. Das Band (Mehrzahl Bänder) steht für eine flach gewobene Textilie, siehe Band (Textil) in der Medizin für einen Bindegewebsstrang, der… …   Deutsch Wikipedia

  • band — band; band·er; band·ke·ram·ik; band·less; band·mas·ter; band·stra·tion; con·tra·band·age; con·tra·band·ist; dis·band; dis·band·ment; fahl·band; hus·band·age; hus·band·er; hus·band·land; hus·band·less; hus·band·like; hus·band·man; hus·band·ry;… …   English syllables

  • Band on the Run — Студийный альбом Пола Маккартни …   Википедия

  • Band Hero — Обложка британского PS2 издания Разработчик Neversoft (Xbox 360/PS3) …   Википедия

  • Band in a Bubble — is a round the clock live broadcast, during which a band spends an extended period of time inside a bubble writing and recording an album. The Band in a Bubble concept was the creation of Paul Curtis, band manager, tour promoter, owner of Valve… …   Wikipedia

  • Band-e-Amir-Seen — Der See Band e Panir – einer der sieben Seen Geographische Lage Afghanistan Daten …   Deutsch Wikipedia

  • Band — may refer to a specific group: * Band (music), a company of musicians * School band, a group of student musicians who rehearse and perform instrumental music together * Band (radio), a range of frequencies or wavelengths used in radio… …   Wikipedia

  • Band-Aid — is the brand name for Johnson Johnson s line of adhesive bandages and related products. However, much of the consuming public in the United States, India, Canada, Brazil and Australia uses the term band aid generically, to refer to any such… …   Wikipedia

  • Band-e Amir — (Persian: بند امیر, meaning Dam of the Amir ) refers to five lakes high in the Hindu Kush Mountains of Central Afghanistan near the famous Buddhas of Bamyan. They were created by the carbon dioxide rich water oozing out of the faults and… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”