Path loss prediction in durian orchard using uniform geometrical theory of diffraction

The analysis of path loss in scattering zone by using UTD is presented. The results of the total field results from the UTD solution agree very well with that from NEC-BSC. Around the vicinity of the source, the UTD results agree with experimental results but not in the further region. This is due to the fact that the line-of-sight and reflected field components are very strong in this region. For the further distance, the path loss of the UTD is stronger than the experimental results. The error comes from the present UTD propagation model which is under assumption that the trees and ground surface are PEC. Therefore, the effects of the actual surface of trees and ground must be included in the calculation to treat the actual environment. The results with the effects of the actual surface will be presented in the next meeting.