Optimum operating frequencies for inter-node communications

This article presents the optimum operating radio frequencies (RF) required for inter-node communications. The work was motivated by the need of many applications requiring energy-efficient communications over a wide range of terrain conditions. Although many factors influence energy-efficient communications, one of the most important factors is use of the most energy-efficient radio frequency for the target application. The results derived indicate that the optimum operating frequency for inter-node communications highly depends on the antenna configurations and terrain conditions. In this article, the background and derivations of the frequency optimization problem are outlined, examples illustrated, key results discussed, and future work identified.