Answer Happy

3. This problem is the free space path low between transmitter and receiver separated by the distance im Lassume that transmit power P-20 WI. TA antenna gain 10 and Rx antenna pin G-20 B (A) For the carrier frequency -2 GH and minimum required receiver sensitivity of Plom, find the maximum range of communication d' in kml (4) (b) Depending on the distance you found in part (a). If the answer in part (as) does not guarantee the minimum communication range dmin 6 Km, we hope to change the carrier frequency to other frequency. Decide whether we need to change for not, first. Then also decide whether the new frequency should be larger or smaller than f 2 GHz. (4) (c) Assume that, in problem 3, the propagation path is modeled as 2-ray ground reflection (one LOS path and one ground reflected path) with the maximum distance d' you found in part (a), along with Tx antenna: G=10 dB with its height h=30[m), Rx antenna Gr=20 dB with its height h=2[m). Calculate total path Loss using: (all 'log' mean base '10', 'd' in [m]) PL[dB] 40 log d - G+ [dB]+ Gr [dB] + 20 log ht+ 20 log hrl. (4)