In recent years, wireless implants have undergone significant development, becoming valuable biomedical instruments for monitoring and treating neurological and mental disorders. Among the others, inductive power transfer is the most promising method for powering multiple, distributed and miniaturized implants. However, achieving high efficiency within the safety-limited specific absorption rate is challenging. High frequencies (above a few hundred MHz) enable miniaturized receivers and higher efficiencies, but lower frequencies (below a few GHz) are needed to avoid heat and power dissipation. The recently introduced frequency-switching inductive link represents a significant innovation in wireless power transfer. This system exploits an active resonator to switch frequencies from a lower (13.56 MHz) to a higher one (433.92 MHz), enabling both miniaturization and good efficiency within safety limits.