Satellite Frequency Bands Uplink And Downlink

Satellite frequencies ghz band.

Satellite frequency bands uplink and downlink.

The rf unit called upconverter is used to convert baseband frequency to rf frequency for transmissions in the uplink side. Now as would have thought separate frequency bands are always allocated for uplink and downlink signals often separated by a gap maybe for future allocation since the span of guard bands. As mentioned above in c band satellite network 3700 to 4200 mhz is used as downlink frequency band. In europe ku band downlink is used from 10 7 ghz to 12 75 ghz for direct broadcast satellite services such as astra.

Io 86 lapan a2 145 880 mhz. Satellite is in a low inclination low earth orbit and not visible north of about 30 degrees north or south of 30. 70 150 mhz. Initial operation of the new radio system is in fm cross band repeater mode using an uplink frequency of 145 990 mhz with an access tone ctcss of 67 hz and a downlink frequency of 437 800 mhz.

Satellite vsat communication is split up in to four radio frequency rf bands that commercial communication and military satellites operate within. Frequency band separation allows the same antenna to be used for both receiving and transmitting simplifying the satellite hardware. Ka band 26 40 ghz communications satellites uplink in either the 27 5 ghz and 31 ghz bands and high resolution close range targeting radars on military aircraft. The most popular frequency bands available on satellite are l band s band c band x band ku band k band and ka bands.

C band satellite will usually will have 5 925 to 6 425 ghz frequency range in the uplink and 3 7 to 4 2 ghz frequency range in the downlink. Io 86 lapan a2 uplink fm 88 5 hz ctcss downlink fm. For real time updates about which mode the satellite is in see the amsat live oscar satellite status page. In gsm frequency range from 935 mhz to 960 mhz is used as downlink frequency range.

Here are the band designators the first letter stands for the uplink the second letter for the downlink. So uplink frequency is different from downlink frequency. 800 2150 mhz. To overcome the above mention difficulties satellite repeaters must involve some form of frequency translation before power amplification.

These different frequency bands have separate uplink tx and downlink rx frequencies require different rf components lnb and buc and are suited to different applications.