Resonant inductive coupling is a method of transferring electrical energy between two coils through magnetic fields. When both coils are tuned to the same frequency, they can efficiently exchange energy without direct contact. This technique is commonly used in wireless charging systems for devices like smartphones and electric vehicles. The principle relies on the concept of resonance, where the coils oscillate at a specific frequency. When one coil, known as the transmitter, generates an alternating magnetic field, the other coil, called the receiver, captures this energy. This technology is also applied in medical devices and RFID systems for various applications.