Satellite uplink and downlink Analysis and Design: 1. Satellite Orbits Frequency Bands There are four radio frequency bands that communication and military satellites operate within: C band uplink 5.925-6.425 GHz; downlink 3.7-4.2 GHz The C band is primarily used for voice and data communications as well as backhauling. It receives uplink signal from the satellite antenna and transmits downlink signal to the satellite antenna. Figure 1. Satellite frequency bands. So with this in mind, let’s look at each region, the uplink carrier, the translation frequency, and then the results for the downlink. These calculations basically relate two quantities, the transmit power and the receive power, and show in detail how the … The available frequencies are 2414/ 2432/ 2450/ 2468 MHz. uplink frequency. (2) The downlink frequencies specified in the table are calculated from the expression Fch(n) = fch(n) TR, rounded to the nearest Hertz, where Fch(n) is the frequency of channel n for the downlink columns; fch(n) is the frequency of channel n in the uplink column; 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 The Ka-band offers considerable amounts of bandwidth (about 1 GHz on the uplink and downlink for each The resulting carrier-to-noise density ratio given by Eq. overcrowding of the radio frequency spectrum, the Ka frequency band is becoming one of the most sought after portions of the spectrum, and there is an increasing demand for it by both military and commercial users of satellite communications. The downlink the satellite is transmitting the signal and the earth station is receiving it. Low Noise Amplifier (LNA) amplifies the weak received signal. Because of its weaker power it requires a larger antenna, usually above 1.8m (6ft). Uplink - The transmission of signals to the satellite Uplink Communication Links 1/4. Satellite technology is developing fast, and the applications for satellite technology are increasing all the time. ... − This causes slightly different footprints for uplink and downlink ... • Up Converter–Converts the modulated signals from RF to RF frequency The Satellite Transponder receives The receiving frequency can be selected by 'Frequency Select' key. It consists of Uplink Transmitter, Satellite Link and Downlink Receiver, which can be conveniently placed in the laboratory. Send an command only to a specific satellite to downlink FM packet. (2) is that which appears at the satellite receiver. 3.12 Downlink . This chapter describes how the link-power budget calculations are made. Carrier Processor performs the frequency down conversion of received signal (uplink). uplink and 749 for X-uplink. Introduction . Switch 'ON' the Downlink Receiver and frequency display will come on. Scientech 2272A Satellite Communication platform provides an indepth study of basic Satellite Communication system. 480238 views 1171 likes. Select the Downlink Receiver frequency same as to Uplink Transmitting frequency ue. ESA / Applications / Telecommunications & Integrated Applications. ITU Region 1 Uplink Frequency = 13.75 GHz Translation Frequency = 2.8 GHz Downlink Frequency = 13.75 – 2.8 = 10.95 GHz ITU Region 2 Downlink - The transmission of information from the satellite. This block determines the type of transponder. The uplink command contains a header that specifies the satellite targeted. The Satellite can be placed at an elevated, position if needed. 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