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C-band is characterized by larger antennas and is preferred by a variety of full-time service providers. C-band ("compromise" band) is a portion of electromagnetic spectrum in the microwave range of frequencies ranging from 4 to 6 GHz -- normally downlink 3.7–4.2 GHz, uplink 5.9–6.4 GHz.
Ku-band services generally use smaller antennas and have become more common for home use. The Ku-band ("kay-yoo" kurz-under band) frequencies ranging from 12 to 18 GHz.
The new Ka-band frequencies represent the leading edge for advanced services. The Ka band (kurz-above band) ranges from 18 to 40 GHz.
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