C band (IEEE)

C bandC-bandCC-Band satelliteC-C-Band transponderssatellite feed
The C band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 gigahertz (GHz); however, this definition is the one used by radar manufacturers and users, not necessarily by microwave radio telecommunications users.wikipedia
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Microwave

microwavesmicrowave radiationmicrowave tube
The C band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 gigahertz (GHz); however, this definition is the one used by radar manufacturers and users, not necessarily by microwave radio telecommunications users.
Frequencies in the microwave range are often referred to by their IEEE radar band designations: S, C, X, K u, K, or K a band, or by similar NATO or EU designations.

Satellite television

satellitedirect broadcast satellitesatellite TV
This use contrasts with direct-broadcast satellite, which is a completely closed system used to deliver subscription programming to small satellite dishes that are connected with proprietary receiving equipment.
These systems received weaker analog signals transmitted in the C-band (4–8 GHz) from FSS type satellites, requiring the use of large 2–3-meter dishes.

Television receive-only

TVROBig ugly dishC-band
The satellite communications portion of the C band is highly associated with television receive-only satellite reception systems, commonly called "big dish" systems, since small receiving antennas are not optimal for C-band systems.
Television receive-only (TVRO) is a term used chiefly in North America to refer to the reception of satellite television from FSS-type satellites, generally on C-band analog; free-to-air and unconnected to a commercial DBS provider.

Weather radar

Doppler weather radarradarDoppler radar
The C band (4 to 8 GHz) is used for many satellite communications transmissions, some Wi-Fi devices, some cordless telephones as well as some surveillance and weather radar systems.
Thus 10 cm (S-band) radar is preferred but is more expensive than a 5 cm C-band system.

Multichannel television in the United States

multichannel video programming distributorMVPDpay television
One use of the C band is for satellite communication, whether for full-time satellite television networks or raw satellite feeds, although subscription programming also exists.
In the early days of home satellite dishes, the two types of service were low-power C-band service with large dishes 8 to 12 feet wide, and high-power Ku-band.

Radar

radar stationradarsradar system
The C band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 gigahertz (GHz); however, this definition is the one used by radar manufacturers and users, not necessarily by microwave radio telecommunications users.

S band

S-bandSS-
Note that by using the band from 3.7 to 4.0 GHz, this C band overlaps somewhat into the IEEE S band for radars.
Before implementation of this system, C-band frequencies were commonly used for weather surveillance.

Communications satellite

satellite communicationssatellitecommunication satellite
The C band (4 to 8 GHz) is used for many satellite communications transmissions, some Wi-Fi devices, some cordless telephones as well as some surveillance and weather radar systems. For satellite communications, the microwave frequencies of the C band perform better under adverse weather conditions in comparison with the K u band (11.2 GHz to 14.5 GHz), microwave frequencies used by other communication satellites.
Fixed Service Satellites use the C band, and the lower portions of the K u band.

Ku band

K u bandKu-bandK u -band
For satellite communications, the microwave frequencies of the C band perform better under adverse weather conditions in comparison with the K u band (11.2 GHz to 14.5 GHz), microwave frequencies used by other communication satellites.
Compared with C-band, K u band is not similarly restricted in power to avoid interference with terrestrial microwave systems, and the power of its uplinks and downlinks can be increased.

Indian National Satellite System

INSATINSAT-1BINSAT 4B
}. It carries seventeen C-band and lower extended C-band transponders providing zonal and global coverage with an Effective Isotropic Radiated Power (EIRP) of 36 dBW.

SES S.A.

SESSociété Européenne des SatellitesSES Global
services, in September 2018 the C-Band Alliance (CBA) was established by the four satellite operators, Intelsat, SES, Eutelsat and Telesat that provide the majority of C-band satellite services in the US, including media distribution reaching 100 million US households.
In February 2018 SES teamed up with Intelsat (later joined by Eutelsat in July 2018) for a proposal to US Federal Communications Commission (FCC) to form a consortium of satellite service providers to protect the quality and reliability of existing video and audio services to US households downlinking in the 3700-4200 MHz C-band spectrum while enabling wireless operators to access 100 MHz of C-band spectrum for deployment of next generation 5G services in the US.

5-centimeter band

5 cm5 centimeters5 centimeter (5 GHz)
This is known as the 5-centimeter band by amateurs and the C band by AMSAT.
The band is within the IEEE C Band spectrum.

Institute of Electrical and Electronics Engineers

IEEEFellow of the Institute of Electrical and Electronics EngineersTechnical Field Award
The C band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 gigahertz (GHz); however, this definition is the one used by radar manufacturers and users, not necessarily by microwave radio telecommunications users.

Electromagnetic spectrum

spectrumspectraspectral
The C band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 gigahertz (GHz); however, this definition is the one used by radar manufacturers and users, not necessarily by microwave radio telecommunications users.

Telecommunication

telecommunicationscommunicationstelecom
The C band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 gigahertz (GHz); however, this definition is the one used by radar manufacturers and users, not necessarily by microwave radio telecommunications users.

Hertz

MHzkHzHz
The C band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 gigahertz (GHz); however, this definition is the one used by radar manufacturers and users, not necessarily by microwave radio telecommunications users. The C band (4 to 8 GHz) is used for many satellite communications transmissions, some Wi-Fi devices, some cordless telephones as well as some surveillance and weather radar systems. For satellite communications, the microwave frequencies of the C band perform better under adverse weather conditions in comparison with the K u band (11.2 GHz to 14.5 GHz), microwave frequencies used by other communication satellites.

Wi-Fi

WiFiwireless internetwireless
The C band (4 to 8 GHz) is used for many satellite communications transmissions, some Wi-Fi devices, some cordless telephones as well as some surveillance and weather radar systems.

Mobile phone

cell phonemobile phonesmobile
The C band (4 to 8 GHz) is used for many satellite communications transmissions, some Wi-Fi devices, some cordless telephones as well as some surveillance and weather radar systems.

Microwave transmission

microwave radio relaymicrowave relaymicrowave link
The same frequencies were already in use for terrestrial microwave radio relay chains.

Telecommunications link

downlinkuplinkforward link
Nearly all C-band communication satellites use the band of frequencies from 3.7 to 4.2 GHz for their downlinks, and the band of frequencies from 5.925 to 6.425 GHz for their uplinks.

Transponder (satellite communications)

transponderstransponderbent pipe
The C-band communication satellites typically have 24 radio transponders spaced 20 MHz apart, but with the adjacent transponders on opposite polarizations.

Polarization (waves)

polarizationpolarizedpolarized light
The C-band communication satellites typically have 24 radio transponders spaced 20 MHz apart, but with the adjacent transponders on opposite polarizations.

Electronics

electronicelectronic equipmentelectronic device
(The unused 4.0 MHz between the pairs of transponders acts as "guard bands" for the likely case of imperfections in the microwave electronics.)

Rain fade

fadingrainrain attenuation
Rain fade – the collective name for the negative effects of adverse weather conditions on transmission – is mostly a consequence of precipitation and moisture in the air.

Precipitation

rainfallhydrometeorannual precipitation
Rain fade – the collective name for the negative effects of adverse weather conditions on transmission – is mostly a consequence of precipitation and moisture in the air.