Satellite Link Budget
Satellite Link Budget Q.1) An earth station antenna has a diameter of 30m has an overall efficiency of 68% and is used to receive a signal at 4150MHz. At this frequency system noise temperature is 79K when antenna points at the satellite at the elevation angle of 28 0 . What is earth station G/T under these conditions? If heavy rain causes the sky temperature to increase so that the system noise temperature rises to 88K, what is the new G/T value? Q.2) Define following terms i) Kepler’s First Law ii) Kepler’s Second Law iii) Geostationary Earth Orbit iv) Polar Orbit v) Low Earth Orbit Q.3) At input of receiver received carrier power is 400pW and system noise temperature is 450K. Calculate carrier to noise ratio. For a bandwidth of 36MHz calculate carrier to noise density ratio in dBHz. Q.4) A satellite freq of 11.7GHz is used by satellite locate