Satellite Uplink And Downlink Frequency

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.

Satellite uplink and downlink frequency.

If both uplink and downlink shared the same frequency. Satellite vsat communication is split up in to four radio frequency rf bands that commercial communication and military satellites operate within. Pertaining to radiocommunication service an uplink ul or u l is the portion of a feeder link used for the transmission of signals from an earth station to a space radio station space radio system or high altitude platform station. This block determines the type of transponder.

Low noise amplifier lna amplifies the weak received signal. Io 86 lapan a2 145 880 mhz. 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 uplink fm 88 5 hz ctcss downlink fm.

The direction from vsats to sallite is known as uplink and the direction from satellite to vsats is known as downlink. Pertaining to gsm and cellular networks the radio uplink is the transmission path from the mobile station cell phone to a base station cell site. Trying to receive and transmit an amplified version of the same uplink waveform at same satellite will cause unwanted feedback or ring around from the downlink antenna back into the receiver. 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.

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. For real time updates about which mode the satellite is in see the amsat live oscar satellite status page. The satellite transmitter generates a signal that would jam its own receiver. It receives uplink signal from the satellite antenna and transmits downlink signal to the satellite antenna.

5925 mhz to 6425 mhz is uplink band where as 3700 to 4200 mhz is downlink band. Satellite is in a low inclination low earth orbit and not visible north of about 30 degrees north or south of 30.