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1- An earth station receive antenna has a sky component temperatureof 20 K, a ground component temperature of 15 K . What is the totalantenna noise temperature [K]?

2- A receive earth station has a line loss of 0.1 dB, followed byan amplifier with noise temperature 100 K and gain 50 dB, and areceiver with noise figure 30 dB. What is the equivalent noisetemperature [K] of this cascade of 2-port devices?

3- A receive earth station has an antenna temperature of 25 K, andits cascade of 2-port devices has an equivalent noise temperaturesof 112 K . What is its system noise temperature [K]?

4- A receive earth station has an antenna gain of 45 dBi, and asystem noise temperatures of 137 K . What is its G/T [dBW/K]?

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M9863719

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