A New Propagation Model to Explain Trans-Horizon Communication

Abstract

The characteristics of troposphere play an important role for trans-horizon communication of radio signal. This paper proposes a propagation model to predict path loss, which is the sum of free space loss, diffraction loss, reflection loss and thermal lens loss. The role of thermal lenses under the desert and equatorial climates for the normal and worst month conditions has been discussed. This model is useful during the design of VHF/UHF communication links for reliable operation in the different climatic conditions.

Indexing terms:

• Radiowave trans-horizon propagation
• Path loss prediction