If in the communication system described in Problem 5.5, the screen is inserted so that its edge is 20 m above the direct path, calculate the excess path loss and the total path loss.
Problem 5.5
A 1.8 GHz transmitter and a receiver are separated by 6 km. A sharp edge absorbing screen is inserted below and normal to the direct path between transmitter and receiver, which is 2 km from the transmitter. How closely can the edge of the screen approach the direct path and not introduce excess path loss