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Basics Satellite Radio Spectrum - Frequencies

When it comes to communications satellites, the portion of the radio spectrum to be used is determined virtually all system capacity, power and price. Therefore, we give a brief summary of the main frequency bands used in satellite systems. The information available on this aspect is not very detailed and are daily news.

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The frequency bands

Different wavelengths have different properties. The longer wavelengths can travel long distances and through obstacles. Large wavelengths traverse can surround buildings or mountains, but the higher frequency (and thus lower the wavelength), the more easily may stop waves.

When frequencies are high enough (we're talking tens of gigahertz), the waves can be stopped by objects like leaves or raindrops, causing the phenomenon known as "rain fade". To overcome this phenomenon considerably more power is required, which means more powerful transmitters or antennas focused, which causes the price of the satellite increase.

The advantage of the high frequencies (Ku and Ka bands) is that they allow the transmitters send more information per second. This is because the information is usually deposited in a certain part of the wave: the ridge, the valley, the beginning or the end. The commitment of the high frequencies is that they can carry more information, but they need more power to prevent blockages, more antennas and more expensive equipment.

Specifically, the bands used in satellite systems are:

Detail of the names of the different frequency bands:

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