Initial Observation Of Energy Conversion By Using Rectenna

Nur Izni, Roslan (2013) Initial Observation Of Energy Conversion By Using Rectenna. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, the battery is one of a necessary device for everyone in their life. Battery always been the problem which is the lifetime of the battery is very limited and requiring periodical battery replacement. The deposition of battery is creating the problem of environmental pollution. So, this project was designed rectenna to capture and converts the microwave energy to DC voltage that can supply energy for low voltage devices without using electricity or battery automatically. The law of conservation energy stated that the energy cannot be created and destroyed. Energy conversion is the process of converting one form of energy into another form. This thesis describes the original work on converting microwave energy to DC voltage by using rectenna. Rectenna is a combination of a rectifying circuit and an antenna. The antenna part will capture electromagnetic energy from free space and convert it into an electrical signal. It was designed by using CST microwave studio software and fabricated on FR4 board because the printed rectenna is easy to manufacture. The frequency selected for the antenna is 2.45 GHz, which means the antenna should be able to operate in that frequency because the probability to get high efficiency rectenna is high and it unlicensed frequency band. Rectenna will convert the microwave energy into DC power by using rectifier circuit. Rectifier circuit is consisting of Schottky diode and resistor for power measurement. Based on the experimental results, the highest output voltage measure is 1.695V at 820kΩ and 20dBm input power. This project is successfully proven that rectenna can power up low-voltage device such as LED, which is can replace the battery and can use for RFID application.

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