Design of 2.4 GHz RF to 1.33 V DC Conversion Circuit for Energy Harvesting

Abstract

This paper presents the design of a circuit for energy harvesting that converts 2.4 GHz radio frequency (RF) to 1.33 V DC. The demand for self-sustainable low-power electronic devices requires power to be supplied continuously. The battery has a life circle and is not able to sustain for a long time. Therefore, radiofrequency (RF) is one of the energy sources that can be obtained at any desired voltage for no cost and is widely available. A voltage regulator, charge pump, and rectifier make up the suggested circuit. All circuits are designed using 0.13-μm CMOS process. To convert the antenna's 2.4 GHz RF voltage to DC voltage, an RF rectifier is needed. After the rectifier's DC voltage is increased by the charge pump, the voltage regulator regulates the DC output voltage to the intended output value. At the voltage regulator, the desired DC output voltage will be controlled. The simulation's outcome demonstrates that an RF-DC rectifier circuit operating at 2.4 GHz frequency and a 10 kΩ load resistor may provide a DC output voltage of 78.51 mV. Next, the charge pump increased the rectifier's output voltage to 1.39 V. Lastly, the voltage regulator controlled the charge pump's output to produce a steady DC output of 1.33 V.