VSAT technology needs a frequency for operation, as any other mobile communication technology. The question is which of them is better and when to use each of them? Here you will find a C band Ku band Comparison.
ITU initially defined C-band to be the first satellite band and its frequencies range from 4Ghz to 8Ghz. This range of frequency is also used widely by terrestrial microwave backhaul links nowadays, especially because the sub 6GHz band is free of license in many countries all over the world. On the other hand, signals in C-band are less focused compared to higher satellite frequencies such as Ku-Band. This is due to the longer wavelength in C Band.
Less focused signals means that these signals are less affected by rain a phenomenon known as rain fade of satellite signals. The attenuation on C-band signal due to rain fading ranges from 0. Moreover, these less focused signals can provide wider range of coverage. However, these signals need larger dish size e. Unlike C-Band, Ku-band frequencies are dedicated for satellite communication only. This solves the problem of interfering with terrestrial microwave backhaul links.
Moreover, Ku-Band is characterized by its high powered signals compared to C-band. Thus, smaller dishes can be used to achieve the same distance as C-band and the KU band radio transmitter also requires less power.
Normally, 0. However, Ku-band is more sensitive to rain fade and the attenuation due to rainfall can be up to 10 dB. Both of them can provide accepted QoS and communication speed. ITU has also introduced higher frequency bands such as Ka-band and X-band, which have lowered the load on C-band. Your email address will not be published. This site uses Akismet to reduce spam. Learn how your comment data is processed.
Azimuth and Elevation 10 February From a commercial point of view, C-band is better for satellite applications that need larger bandwidth. From a commercial point of view, Ku-band is better for satellite applications that need smaller bandwidth, as the equipment is cheaper than C-band. Related posts.
Satellite Frequency Bands
Intellian vGX Read more. RicChard says:. Daniel says:. Oche Oche Adama says:. Donovan Moko says:. Wie says:. Leave a Reply Cancel reply Your email address will not be published.Comparing Ku-band and Ka-band satellite capacity is a high interest topic right now in the satellite industry.
A new study just released sheds new light on this important topic. Ku-band currently dominates the aeronautical mobile satellite systems AMSS broadband market. These Ku-band satellites utilize continental scale wide beams.
Ka-band Vs. Ku-band
New Ka-band systems coming onto the market promise to deliver substantially greater throughput than current Ku-band offerings. This fact has led some in the industry to conclude that Ka-band capacity is a superior evolution of Ku-band capacity.
However, this study demonstrates that the superior performance of Ka-band is the result of customized satellites and multiple spot beams. A Ku-band satellite using similarly sized spot beams can equal or exceed the performance of Ka-band satellites.
All this is not to say that one frequency is better or worse than the other. However, correcting the current misunderstanding of many around the performance characteristics of these frequencies is important. It could provide an evolution path to greater satellite capacity with current Ku-band satellites, thereby avoiding the need for expensive changes to terrestrial infrastructure.
Thank you for reading our blog, SatCom Frontier. If you would like to receive future blogs from us via email, please provide your email address below. You can also read our blogs on Facebook and follow us on Twitter. After submitting your email address, you will be redirected to the subscription service website. Thank you. Select one or more mailing lists:. Back to Blog. SatCom Frontier Blog.Chris Hudson, Sr. The launch of next-generation high-throughput satellite HTS constellations by multiple commercial operators has ushered in a new age of performance in satellite communications.
It has also reinvigorated an enduring debate within the industry regarding which frequency is superior: Ku-band vs. Below I aim to separate fact from fiction. In particular, I read with interest some of the statements made in a blog post published by an Inmarsat executive earlier this year.
While this provides access to some leasable TPEs transponder equivalents of 36 MHz each worldwide, it pales next to Ku-band, which has a global supply of over leasable TPEs. Ku-band provides the desired compatibility with an unrivaled depth and breadth of bandwidth options.
There are terminals with swap-out kits for C- X- Ku- and military Ka-band.
what is better c band or ku band
Platforms in a cold spot can experience bandwidth drop by as much as 90 percent. This statement is patently incorrect. First off, it leads with an apples-to-oranges comparison of older Ku-band wide-beam satellites to the newer Ka-band HTS. Ku-band HTS constellations are here now and have been for years. Ku-band HTS have the same hot spots which can also be stitched together for consistent, efficient, high data rate services.
However, per Inmarsat, at any one time, only 72 of those 89 beams can be active. Another key coverage difference, and advantage, of Ku- over Ka-band HTS is satellite depth and overlap. There are four Inmarsat I-5 GX satellites to cover the entire globe. Two thirds of all locations see only a single I-5 satellite and are thus covered by only a single Global Service spot beam. The Intelsat Epic NG constellation has five satellites worldwide which are designed to provide layered coverages in many areas, with a sixth one launching in 4Q This depth of coverages provides end users with resiliency and redundancy unavailable in Ka-band.
Switching between these Ku-band options is possible because of the open architecture compatibility between Intelsat Epic NGIntelsat wide-beam and other Ku-band HTS and wide-beam satellites. This aspect of open architecture is a critical aspect of Intelsat Epic that is completely unaddressed in the Inmarsat blog post.
On a closed-architecture HTS, a customer can use only operator-selected platforms and terminals. In addition, there is no switching between closed systems. The ability to use existing ground equipment in open systems can lead to substantial cost savings while the ability to select a new platform now, or in the future, protects end users from the trap of proprietary systems where they do not have control.
In addition to requiring proprietary ground equipment, closed HTS systems offer only star topology networks. This means that all remote terminal traffic must route via a limited number of gateways or access stations.
Closed architecture HTS do not allow loopback within a single spot beam nor custom beam-to-beam connections. Both are possible with Intelsat Epic NG. This flexibility enables faster routing and, possibly more importantly, installation of all ground hardware at end user locations, not at third party facilities.
One part of the Inmarsat blog with which I can agree is the call for increased industry and government collaboration in support of command, control, communications, computers, intelligence, surveillance and reconnaissance C4ISR operations.
Towards that end, Intelsat is constantly innovating, improving the technology on each Intelsat Epic NG satellite. For example, the soon to be launched Horizons 3e will be the most advanced HTS satellite to enter service. With the multiport amplifier, if one spot beam is lightly utilized, its allocated power can be distributed to other beams to meet customer throughput demands.
When you distill the facts from the claims and counterclaims, Ku-band SATCOM provides the most compelling HTS value proposition for customers requiring resilient, flexible and secure high-throughput global coverage.
If you want your customers to have smaller dishes then you will pick the Ku-Band. To pick up Ku-Band you need at least a 31" dish. May 18, 6, 23 Lizella, Georgia Republic. I don't see where either is better than the other. But, I prefer watching C-Band over ku-Band, because I have a really good Movie Lovers package for my subscription service with my 4dtv.
I use both with different types of receivers, Analog - 4dtv - DVB. Sep 10, 4 Northern USA. Jan 13, 32 0 Albany, NY. I vote C-Band too!
You can usually add Ku to C-Band, but not vice versa. A note about C-Band dishes, get at least 7 feet feet is better. You won't really need it for the signal strength, but you will need it to keep out interference from adjacent satellites, which was really noticeable on analog signals on digital, I guess your quality factor goes down.
Nov 23, 2, 1 Montreal, QC. Sadoun SatelliteGuys Pro. If you can put a C-band dish at your house, go fo it. Anole SatelliteGuys Master. Sep 22, 11, 9 L.A satellite frequency type is important to the selection of your LNBf and dish. More often than not, the frequency predetermines the type of dish and LNBf to be used. For one, if you want to track a c-band frequency, you will receive no joy using a Ku band LNB and dish for such.
Additionally, I shall be talking about ways by which you can identify at a glance, the difference between a Ku Band frequency and its, C band counterpart. However, in this context, I shall be limiting myself to Satellite TV reception only. The C band frequency range is 3.
The polarity of a C-band frequency usually comes as L or R Although a freq with H or V can also be C-Band so, please check the satellite description to disambiguate And because of the low frequencies, C band waves have longer wavelengths. You need a C-Band here Since we are talking bigger wavelengths, then a bigger dish is required to receive such frequencies.
Prime focus dishes are used to receive C band frequencies. This is the most noticeable difference. Typically, most Ku band frequencies come in H or V polarity. I am yet to see a Ku band frequency description with L or R. The Ku band frequency range is Because of the higher frequencies, Ku band waves have shorter wavelengths.
Shorter wavelengths mean that you need a smaller dish to receive these frequencies. Offset dishes are used to receive Ku band frequencies. The smallest commercially available Offset dish is only 65cm in diameter. Important notice: A free to air decoder like qsat, tiger, strong, gsky and so on can help you pre-determine the frequency types. Now we are going to get into more details about reading frequencies provided by a satellite TV company. This satellite has both C band and Ku band transponders.
You can receive the C band TV stations by installing a 1. From the above first batch of numbers is the frequency. In this case, it is The next thing that comes is the Polarity either V or H for Ku band and lastly the symbol rate. This is another Frequency that may be provided, in this casea C band frequency:. These are Ku band dish also known as offset dish and prime focus dish known as c band. Another […]. Your email address will not be published. Notify me of follow-up comments by email.Originally published three years ago, this feature on the differences between L- Ku-and Ka-band inflight connectivity systems has been one of our most popular.
It has now been updated with the latest information on the options available. The terms L-band, Ku and Ka satellites are bandied around quite freely. But do you really know want they mean and the differences between them? This is because Ku is the lower part of the original NATO K band, which was split into three bands Ku, K, and Ka because of the presence of the atmospheric water vapour resonance peak at So what you cry?
Generally, the higher the frequency the more bandwidth you can squeeze out of the system. The difference is just like an FM radio broadcast being compared with medium wave. This still holds true today and is a student essential to understanding satellite throughputs. And the headline bandwidth figure usually refers to the transponder bandwidth from the satellites. Now we need to share that out among the many users.
You also have to consider a whole host of other factors, such as how big is your antenna? What is the elevation of the satellite above the horizon? Yes, weather. Both Ku and Ka can suffer from rain fade Ka more than Ku — this is not usually a problem at 35, feet, but high levels of humidity in tropical areas can also affect signals. Taking L-band first. Inmarsat offers its IP-based kbps SwiftBroadband SBBbut its lightweight kbps SB service, with equipment that can easily be fitted into a bizjet, is also popular.
A newer High Data Rate HDR waveform, can also provide increased data throughput on conventional aircraft — up to kbps using a full kHz bearer — but, again, only in streaming mode. To put a spanner in the works, the satellite thats backs up the new air-to-ground European Aviation Network is S-band — around 2.
Its speeds are currently unknown, but expected to be in the Mbps range. The higher frequencies mean data throughputs in the region of megabits per second Mbps are possible, compared with kbps with the current L-band SwiftBroadband — up to a x speed increase.
ViaSat also offers its Ka-band in-flight Exede system, which can deliver up to 12 Mbps to each passenger. Each spot beam has a higher power density, hence the higher bandwidths available.
Both Ka and Ku are also benefitting from new modem designs that promise to boost data throughputs even further. In fact, both Ku and Ka providers talk about speeds of up to Mbps to the aircraft. The reality is, airlines want good, consistent, reliable connectivity first and foremost. The Ku or Ka argument is becoming secondary. So there you have it. Each band — L, Ku and Ka — works on a different set of frequencies. In general, the higher the frequency the higher the throughput.
However, three key parameters can be manipulated in order to optimise the capacity of a communications link — bandwidth, signal power and channel noise.
Communication channel providers develop their technologies in order to achieve the optimal link capacity based on their market needs. An increase in the transmit power level results in an increase of the communication link throughput, likewise a decrease in power will result in the opposite effect reducing the throughput.
Another way to improve the link throughput would be to increase the size of the receiving antenna in order to have a higher level of energy received at the aircraft. But this is where operational constraints become apparent, as, this would lead to an unfeasible installation for a commercial or business aircraft. Notice to all readers: Get Connected has merged with Simple Flying.
To read the latest Get Connected content, please visit our new home by clicking here.The symbol is short for "K-under" originally German : Kurz-untenbecause it is the lower part of the original NATO K bandwhich was split into three bands K uKand K a because of the presence of the atmospheric water vapor resonance peak at K u band is primarily used for satellite communicationsmost notably the downlink used by direct broadcast satellites to broadcast satellite televisionand for specific applications such as NASA 's Tracking Data Relay Satellite used for both space shuttle and International Space Station ISS communications.
K u band satellites are also used for backhauls and particularly for satellite from remote locations back to a television network's studio for editing and broadcasting. The band is split by the International Telecommunication Union ITU into multiple segments that vary by geographical region.
NBC was the first television network to uplink a majority of its affiliate feeds via K u band in Some frequencies in this radio band are employed in radar guns used by law enforcement to detect vehicles speeding, especially in Europe.
There are more than 22 FSS K u band satellites orbiting over North America, each carrying 12 to 48 transponders20 to watts per transponder, and requiring a 0. The Segments in those regions are represented by ITU Region 1, and they are the In Europe K u band is used from Australia is part of ITU Region 3 and the Australian regulatory environment provides a class license that covers downlinking from This statement has made many people unsure about using K u -band 11 — 18 GHz in Indonesia.C-Band & Ku-Band on same TV, one receiver
Using frequencies higher than 10 GHz in a heavy rain area usually gives poor results. This problem can be solved by using an appropriate link budget when designing the wireless communication link. Higher power can overcome the loss to rain fade. Measurements of rain attenuation in Indonesia have been done for satellite communication links in Padang, Cibinong, Surabaya and Bandung.
ITU-R P. This model can create a Use of the K u -band for satellite communications in tropical regions like Indonesia is becoming more frequent. Several satellites above Indonesia have K u -band transpondersand even K a band transponders. Other ITU allocations have been made within the K u band to the fixed service microwave towersradio astronomy service, space research service, mobile service, mobile satellite service, radiolocation service radaramateur radio serviceand radionavigation. However, not all of these services are actually operating in this band and others are only minor users.
Compared with C-bandK 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. This higher power also translates into smaller receiving dishes and points out a generalization between a satellite's transmission and a dish's size.
As the power increases, the size of an antenna's dish will decrease. A major attraction of the band over lower frequency microwave bands is that the shorter wavelengths allow sufficient angular resolution to separate the signals of different communication satellites to be achieved with smaller terrestrial parabolic antennas. From the Rayleigh criterionthe diameter of a parabolic dish required to create a radiation pattern with a given angular beamwidth gain is proportional to the wavelengthand thus inversely proportional to the frequency.
Note the inverse linear correlation between dish size and frequency. As power levels on both C and K u band satellites have increased over the years, dish beam-width has become much more critical than gain. The K u band also offers a user more flexibility. A smaller dish size and a K u band system's freedom from terrestrial operations simplifies finding a suitable dish site.
For the end users K u band is generally cheaper and enables smaller antennas both because of the higher frequency and a more focused beam.
There are, however, some disadvantages of K u band system. Therefore, the K u band satellites typically require considerably more power to transmit than the C-band satellites.
Another weather-caused degradation called "snow fade" is not specific to the K u band. It is due to snow or ice accumulation on a dish significantly altering its focal point. The satellite operator's Earth Station antenna requires more accurate position control when operating at K u band due to its much narrower beam focus compared to C band for a dish of a given size.