Microwave Frequency Bands
The microwave spectrum is usually defined as electromagnetic energy ranging from approximately 1 GHz to 100 GHz in frequency, but older usage includes lower frequencies. Most common applications are within the 1 to 40 GHz range. One set of microwave frequency bands designations by the Radio Society of Great Britain (RSGB), is tabulated below:
|Letter Designation||Frequency range|
|L band||1 to 2 GHz|
|S band||2 to 4 GHz|
|C band||4 to 8 GHz|
|X band||8 to 12 GHz|
|Ku band||12 to 18 GHz|
|K band||18 to 26.5 GHz|
|Ka band||26.5 to 40 GHz|
|Q band||33 to 50 GHz|
|U band||40 to 60 GHz|
|V band||50 to 75 GHz|
|E band||60 to 90 GHz|
|W band||75 to 110 GHz|
|F band||90 to 140 GHz|
|D band||110 to 170 GHz|
P band is sometimes used for Ku Band. "P" for "previous" was a radar band used in the UK ranging from 250 to 500 MHz and now obsolete per IEEE Std 521, see and.
When radars were first developed at K band during World War II, it was not realized that there was a nearby absorption band (due to water vapor and oxygen at the atmosphere). To avoid this problem, the original K band was split into a lower band, Ku, and upper band, Ka see.
Read more about this topic: Microwave
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