August 2012
Intermediate to advanced
360 pages
10h 14m
English
Content preview from RF and Microwave Engineering: Fundamentals of Wireless Communications
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8.4 Problems
8.1. Derive the plane earth path loss equation (Equation 8.13) for electromagnetic wave propagation over ground.
8.2. Two antennas (f = 400 MHz) are located at the same height hTX = hRX = 5 m at a distance of r1 = 2 km. We assume plane earth loss conditions.
Now, the distance between the antennas is increased to r2 = 3 km. To what height must the antennas be set to get the same receive power as in the previous case?
8.3. Let us consider a communication link (f = 10 GHz) between a ground station and a satellite in geostationary earth orbit (GEO). The distance between a GEO satellite and the ground station is r = 36 000 km. The antenna gains for ground station and satellite are Ggs = 30 dBi and Gsat = 20 dBi, respectively.
a. Determine the free space loss LF0
b. Calculate the receive power PRX for a transmit power of PTX = 1 W.