X-band RF isolators and circulators

　　The X-band belongs to the microwave frequency range. There are two versions of X-BAND, one refers to the radio wave band with frequencies between 8-12 GHz, and the other states that the frequency range of X-band is 7-11.2 GHz.

　　According to the IEEE 521-2002 standard, the X-band refers to the radio wave band with frequencies between 8-12 GHz (wavelength range 37.50-25.00 mm), which belongs to the microwave category in the electromagnetic spectrum.

　　The typical downlink frequency of the X-band is 7.25-7.75GHz, and the uplink frequency is 7.9-8.4GHz, also commonly known as the 7/8 GHz X-band.

　　The X-band communication frequency range commonly used by NASA and the European Space Agency's deep space stations is 7145-7235MHz for uplink and 8400-8500MHz for downlink.

　　Some experts do not agree that 7.25-7.75GHz belongs to the X-band, they believe it belongs to the C-band However, many literature and journals classify 7.25-7.75GHz as X-band.

　　According to Article 8 of the International Telecommunication Union Radio Regulations, the X-band is used for space research, broadcasting satellites, fixed communication service satellites, Earth exploration satellites, meteorological satellites, and other purposes in space applications. Rain attenuation has a certain impact on signal transmission in the X-band.

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