C band

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ITU Radio Band Numbers 4 5 6 7 8 9 10 11 12

ITU Radio Band Symbols VLF LF MF HF VHF UHF SHF EHF

NATO Radio bands A B C D E F G H I J K L M

IEEE Radar bands HF VHF UHF L S C X Ku K Ka V W edit

Contents 1 NATO C band 2 IEEE C band 2.1 C band variants 2.2 See also 3 Notes

[edit] NATO C band

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

[edit] 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.^[1].

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.

[edit] C band variants

Slight variations of C band frequencies are approved for use in various parts of the world.

C Band Variants Around The World
Band	Transmit Frequency (GHz)	Receive Frequency (GHz)
Extended C Band	5.850–6.425	3.625–4.200
Super Extended C Band	5.850–6.725	3.400–4.200
INSAT C Band	6.725–7.025	4.500–4.800
Palapa C Band	6.425–6.725	6.425–6.725
Russian C Band	5.975–6.475	3.650–4.150
LMI C Band	5.7250–6.025	3.700–4.000

[edit] See also

• Communications satellite
• Big ugly dish
• Satellite dish
• 4DTV

[edit] Notes

v • d • e Radio spectrum ELF 3 Hz 30 Hz SLF 30 Hz 300 Hz ULF 300 Hz 3 kHz VLF 3 kHz 30 kHz LF 30 kHz 300 kHz MF 300 kHz 3 MHz HF 3 MHz 30 MHz VHF 30 MHz 300 MHz UHF 300 MHz 3 GHz SHF 3 GHz 30 GHz EHF 30 GHz 300 GHz

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