Design A Dualband Rectifying Circuit For RF Power Transfer

Md Guzali , Mohamad Azli Zhafri (2016) Design A Dualband Rectifying Circuit For RF Power Transfer. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Design A Dualband Rectifying Circuit For RF Power Transfer.pdf - Submitted Version Download (453kB)

Abstract

Energy harvesting known as power harvesting is the process of capturing available energy from a variety of sources such as solar, wind and thermal, and convert it for any practical purpose. Radio Frequency (RF) be one of an available energy in the environment that can be harvested due to the number of mobile base station and handsets continues to increase. Nowadays, low application device or equipment are powered up by batteries which the batteries have a limitation in term of life span. Therefore, a dual band rectifying circuit for RF energy power transfer is invented to harvest an energy from RF source which has the potential to produce a low DC power energy. This dual band rectifying circuit is designed to operate at the frequency 1.8GHz and 2.45GHz with an additional Wilkinson Power Combiner circuit acts as a matching circuit to achieved a high performance of RF-DC conversion. Advance design system (ADS) is a tool used to analyze, validate and fabricate the design of the rectifying circuit. The rectifying circuit is injected with two different frequency while the input power is varying from -20dBm until 20dBm for both simulation and measured. As a result, if only 1.8GHz frequency is injected at once, the output voltage can achieve until 5V while for input frequency 2.45GHz the output voltage can obtain around 3V for input power 20dBm. But, if both input frequency is injected at the same time, the output voltage can reach until 7V for 20dBm input power. Based on the output voltage, the highest efficiency for this rectifier is 91.56% which is produced for the input power is 15dBm. As a conclusion, the output of the rectifier can be used to run any application such as wireless sensor network which needs a low power to turn it on.

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