* Ka-band: A higher frequency microwave band, typically used for satellite communication, often for high-throughput applications. The specific frequency ranges vary slightly depending on the region and application, but generally sits around 26.5 GHz to 40 GHz.
* Ku-band: Another microwave band used for satellite communication. It's lower in frequency than Ka-band, generally ranging from 10.7 GHz to 18 GHz.
* K-band: This is a broader band encompassing both Ku- and Ka-bands. It's less specific than the other two.
* C-band: A lower-frequency microwave band (around 4 GHz to 8 GHz) used for satellite communication and other purposes. It offers better penetration of atmospheric conditions but generally provides lower bandwidth than Ku- or Ka-band.
* X-band: A microwave band used in various applications, including radar and satellite communication. It sits between C-band and Ku-band, with frequencies generally around 8-12 GHz.
In short, "Ka Ku K C X band" is a list of microwave frequency bands commonly used, particularly in satellite communications, in order of roughly increasing frequency.