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What Is The Difference Between Ku Band, VSAT Band And C Band?

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Anonymous Profile
Anonymous answered
Many of our customers, especially those located in Africa, ask us about the difference between C- and KU band.
Satellite communication systems are subject to international agreements and regulations. The International Telecommunication Union (ITU) regulates frequency use and defines "bands"
The following bands are commonly used:

- C-band was the first band to be used for satellite communication systems. However, when the band became overloaded (due to the same frequency being used by terrestrial microwave links) satellites were built for the next available frequency band, the Ku-band. Today C-Band also gets disturbed by mobile phones.

- Ku-band is typically used for broadcasting and 2-way Internet connections.


C-band:

The C-band frequency range has one significant problem. It is the frequency region assigned to terrestrial microwave radio communication systems. There are an emerging number of these microwave systems located all over the world and they carry a large volume of commercial communications. Consequently, the VSAT locations needed to be restricted in order to prevent interference with the terrestrial microwave communication systems. As mobile phones get used more and more in countries all over Africa as well, the use of C-Band in future will possibly certainly rather decrease than increase. At the current point of time - C Band nevertheless is widely used. In particular as KU band capacity over some regions has become quite limited.

Ku-band:

The Ku-band frequency range is allocated to be exclusively used by satellite communication systems, thereby eliminating the problem of interference with microwave systems. Due to higher power levels at new satellites Ku-band allows for significantly smaller earth station antennas and RF units to be installed at the VSAT location.

The myth:

At the inception of satellite communications in Africa, C-band was the only option. It has been the long held belief that Ku-band could not be deployed in Africa due to the torrential rains associated with the continent. However, with the technology progress in the satellite industry, more powerful satellites now exist and equipment has been developed which strengthens the link quality even in fierce conditions, thereby eliminating the impact of heavy showers. Its all a matter of correct design and proper equipment.

This allows Level421 to offer up-time guarantees ranging from 99.70% - 99.95% using the Ku-band frequencies.


Which solution to choose depends today from commercial and less from technical factors, as no matter what frequency band used - both technologies supply internet services at acceptable quality.

Commercially it is fact that hardware for C Band is slightly more expensive while the capacity is cheaper. So customers with large bandwidth requirements preferably choose this technology.

KU Band on the other hand operates with small antennas and less expensive equipment, while the capacity price is higher than C Band.

C-Band
Down-link: 3.7 – 4.2 GHz
Up-link: 5.9 – 6.4 GHz

Advantages:
• Less disturbance from heavy rain fade
• Cheaper Bandwidth
Disadvantages:
• Needs a larger satellite dish (diameters of minimum 2-3m)
• Powerful (=expensive) RF unit
• More expensive hardware
• Possible Interference from microwave links

Ku Band
Down-link: 11.7 – 12.2 GHz
Up-link: 14.0 – 14.5 GHz

Advantages:   
• No interference from microwave links and other technologies
• Operates with a smaller satellite dish (diameters from 0.9m) -> cheaper and more easy installation
• Needs less power -> cheaper RF unit
Disadvantages:
• More expensive capacity
• Sensitive to heavy rain fade (significant attenuation of the signal) / possibly can be managed by appropriate dish size or transmitter power.
Anonymous Profile
Anonymous answered
C band dishes are large in size approximately 6-7feet,while ku band is very smaller and easy to install at household.Vsat is mostly used for downlinking and uplinking from the mobile station.c band has large coverage than ku band and c band is a type of commercial version of Vsat while ku band is used for satellite communication and also ku band is affected by wheather while c band is not affected by wheather.
AMOS IBRAHIM Profile
AMOS IBRAHIM answered
The c band uses bigger dishes than ku band. C band is not mostly affected by weather.
Anonymous Profile
Anonymous answered
Frequency Band   Uplink (GHz)   Downlink (GHz)
  Earth Station to satellite   Satellite to Earth Station

C Band   5.925 to 6.425   3.700 to 4.200
Extended C Band   6.725 to 7.025   4.500 to 4.800
Ku Band   14.000 to 14.500   10.950 to 11.700

VSAT band? No VSAT Band. VSAT is the equipment used to uplink and downlink using the bands listed above. The Ku Band compared to C Band is frequency. The higher the frequency, the smaller the dish can be to capture or receive the signals coming from the satellite.
Anonymous Profile
Anonymous answered
C band has a larger coverage than Ku band
Anonymous Profile
Anonymous answered
VSAT is an acronym for the equipment used (Very Small Aperture Terminal) but has become known as the term for the type of service, often data voice (just like satellite TV is a service). Ku and C Bands refer to the frequency on which the service or equipment operates. So you can get Ku or C Band VSAT systems like you can get Ku or C Band Satellite TV.
Aisha Profile
Aisha answered
The Ku band, also known as Kurtz-under band is used for satellite communications, particularly for editing and broadcasting satellite television Broadcast. Whereas VSAT is also a type of tool for satellite communication. It stands for Very Small Aperture Terminal (VSAT), and is a two-way satellite ground station with a dish antenna that is smaller than 3 meters. C band is a type pf commercial version of VSAT.
Anonymous Profile
Anonymous answered
The Ku band is used for satellite communications, particularly for editing and broadcasting satellite television Broadcast. Whereas VSAT is also a type of tool for satellite communication. C band is a type pf commercial version of VSAT. .... Thanks for Aicha
Anonymous Profile
Anonymous answered
C Band Dishes are large in size, approx 6-7 feet, where as ku band are respectively very smaller and easy to install at households. VSAT is mostly used for downlinking and uplinking from mobile stations

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