Satellite Uplink And Downlink Frequency Range

L band in the range from 1621 35 to 1626 5 mhz used for both uplink and downlink.

Satellite uplink and downlink frequency range.

The direction from vsats to sallite is known as uplink and the direction from satellite to vsats is known as downlink. Simplified summary of ka band satellite allocations annex 1 simplified summary of ka band satellite frequency allocations for communication satellite networks uplink downlink 27 0 ghz 17 3 ghz fss uplink in in regions 1 and 3 band 17 3 18 1 ghz. Io 86 lapan a2 uplink fm 88 5 hz ctcss downlink fm. There are a number of radio frequency ranges in use in satellite communications such as c x ku ka and even ehg and v band.

Take a look at the drawing below and note the path of devices on the left hand. For real time updates about which mode the satellite is in see the amsat live oscar satellite status page. Iridium satellite frequency description. The term uplink chain is used to refer to the series of pieces of equipment that are used to produce a radio frequency signal for sending out data.

In some countries the gsm 900 band has been extended to cover a larger frequency range. The downlink chain is built using nearly the same equipment in reverse order. 6ghz band frequency is used for uplink and 4ghz frequency band is used for downlink in c band satellite communication operation. Io 86 lapan a2 145 880 mhz.

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. In europe ku band downlink is used from 10 7 ghz to 12 75 ghz for direct broadcast satellite services such as astra. 5925 mhz to 6425 mhz is uplink band where as 3700 to 4200 mhz is downlink band. 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.

Between iridium phone terminal and iridium satellite. Because of its weaker power it requires a larger antenna usually above 1 8m 6ft. To prevent interferance caused by multiple sites transmitting on the same frequencies government agencies and standards organizations around the globe try to keep the usage organized and often such controls take the form of government regulations which carry the weight. This extended gsm e gsm uses frequency range 880 915 mhz uplink and 925 960 mhz downlink adding 50 channels channel numbers 975 to 1023 and 0 to the original gsm 900 band.

However due to the lower frequency range it performs better under adverse weather conditions on the ground. The description provided here is imprecise as the exact configuration can vary widely. 23 18 to 23 38 ghz. The c band is primarily used for voice and data communications as well as backhauling.