Feasibility study of wireless energy harvesting

• Main Author: Lai, Jin Wei
• Other Authors: See Kye Yak
• Format: Final Year Project
• Language: English
• Published: 2010
• Subjects: DRNTU::Engineering
• Online Access: http://hdl.handle.net/10356/40149
• Institution: Nanyang Technological University

The project aims to study the feasibility of harvesting low wireless Radio Frequency (RF) ambient energy to power up low power consuming electronics devices. The challenge of making the available low energy into useful energy is overcome by the designed system which successfully captures the low AC energy, rectifies and increases it to supply DC power to selected application. The designed system comprises of receiving antennas aimed to harness energy at 900 MHz, matching circuits to maximize the transfer of energy, Voltage Doubler Circuits which effectively rectify and increase the energy and a charge accumulator circuit to lock the energy obtained. The system will consistently recharge to supply its application with the required power without the use of batteries. In this project, the author researches into the use of different components in enhancing the objective of portable feasible wireless energy transfer at 900 MHz frequency. The final system, consisting of 5 whip antennas, 5 Voltage Doubler Circuits and a Charge Accumulator Circuit, is able to provide a DC output voltage up to 1.3 V at low receiving power of -30 dBm for each antenna.