In a two- ray reflection ground propagation model if the phase difference is kept below 5.9681 radians for phase cancellation. Assume that the receiver antenna height =1.4m and the incident angle i is below 5 degree. Carrier frequency 1800MHz. 1- Prove that tan(i)=(ht+hr)/d 2- Calculate the minimum allowable values for Tx-TR separation distance 3- Find the transmitter antenna height 4- Find the time delay between the two rays at the receiver 5- Find Path loss in decibel if Gt=Gr=1dB