Wireless Power Transmission for Medical Devices: Harnessing Energy from RF Signals

Wireless power transfer (WPT) for medical equipment is a promising technology with the potential to revolutionize healthcare. It offers many advantages over traditional wire-based power delivery, such as increased convenience, reduced discomfort, and extended battery life. One promising approach to WPT for medical devices is to leverage the abundant RF signals in the environment. RF energy harvesting can power medical equipment without the need for batteries or wires, improving patient comfort and safety. This research makes several important contributions to the design of energy-harvesting circuits. Firstly, a nonlinear diode model is developed to accurately represent the diode's behavior within the circuit. This model helps in understanding how the diode performs in the circuit. Secondly, the input impedance of the rectifier circuit is calculated when connected to a load to ensure proper impedance matching. This ensures efficient power transfer from the energy source to the load. Lastly, an impedance-matching network is designed to maximize power transmission. The circuit's performance is evaluated through simulations, considering output voltage and efficiency factors.