Design Of Rectifier With Impedance Matching Circuit For RF Energy Harvesting

Ena, Amilhajan (2014) Design Of Rectifier With Impedance Matching Circuit For RF Energy Harvesting. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Energy harvesters are small systems which able to generate power using unlimited sources of energy. As increased demand for remote and disposable sensor, there is just an increasing interest in battery-less systems use energy harvesters. Thus, a design of rectifying and impedance matching circuit which has potential to use in RF energy harvesting system was introduced. A single stage and double stage rectifying circuit are designed, simulated, fabricated and measured in this study by using the Agilent Advanced Design System (ADS) 2011. Simulation and measurement were carried out for various input power levels at frequency 2.4 GHz. An experimental test has been made by varying the load, R of the rectifying circuit. An equivalent incident signal of 20dB, the system managed to produce 6.778V for single stage and 13.556V for double stage circuit with the optimum load of 1MΩ. From the output voltage in simulation result, the maximum efficiency is 78.57% and 73.37% both for single and double stage rectifier circuit respectively, which can be used to run low-power wireless sensor networks such as precision agriculture, target tracking, emergency relief and temperature sensor.

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