The present work aims at design a system for the characterization of magnetic sensors at high frequencies, from 10 kHz to 100 kHz. The generation of magnetic fields at this frequency range is tricky, because the coil impedance is considerably high, due to its reactive component, which is mainly inductive and, consequently, increases with the excitation frequency. In this sense, the coils must be powered by high voltage levels to reach the current levels required for the generation of the desired magnetic fields. In many cases, these voltage levels prevent a successful system implementation. Intending to overcome those difficulties, it s proposed a compensation strategy for the excitation coil s reactance, pursuing to keep the total impedance value as low as possible. In this way, the voltage drop over the structure s terminals, used to generate the excitation field, decreases, providing high levels of current even with low voltage levels in the power supply. The proposed compensation strategy demands specific adjustments for each frequency, aiming at ensuring a proper impedance matching. The ideal optimum operating point is predicted by a theoretical analyses of the system and, afterwards, a fine adjustment technique is applied for the optimization of the operating point (in the neighborhood of theoretical point), in terms of the non-ideal aspects of the experimental system, not incorporated in the theoretical model. This work presents and discusses the obtained results and concludes about advantages and limitations of this technique.