The task of this work is to study the power transfer and frequency characteristics between two electrically small antennas coupled in close proximity, where the focus is on explaining the phenomenon of frequency separation and showing the dependence of power transfer on the mutual distance of the antennas. The introductory part of the paper describes the historical development of wireless systems and the reasons for their use. In the following chapters, the physical and theoretical basis necessary for understanding the project itself, the ways of adjusting the antennas in the near field, and then the design and implementation of the measurement system itself are explained. Conjugate-complex adjustment was made in the MATLAB software package using adaptive LC-networks at the resonant frequency of 13.56 MHz, and the obtained results were then processed for the purpose of power transfer calculation and frequency characteristic analysis. This same case is shown in the practical implementation of antennas that are in resonance. Through a comparative analysis of both measurements, it can be concluded that the optimal power transmission is achieved at distances where the system is critically coupled, that is, in simpler terms, at distances where the antennas are close enough that losses in power transmission are minimal, but far enough away that frequency separation does not occur. The analysis of the characteristics leads to the conclusion that conjugated complex adjustment is more complex, but theoretically gives the highest performance.