Designing 2.45GHZ Rectenna For Low Voltage Application

Nur Hidayah, Mahmud (2013) Designing 2.45GHZ Rectenna For Low Voltage Application. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This project is another method to harvest energy compared to solar energy because solar energy because solar energy have some limitation. In space, even the satellite has a solar panel to generate energy, radio frequency also can be generated using as a backup power. The main objective of this project is to design a rectenna which operates at 2.45 GHz, frequency centered at ISM band that can capture the microwave signal or RF signal and convert it into DC power. Besides that, the other objective is to fabricate the rectenna for wireless transmission and applied it in low voltage application. In order to achieve these objectives, a patch antenna and rectifying circuit had been designed separately using CST Microwave Studio and then will be fabricated on FR4 board. The impedance matching for both designs are set at 50 ohms. Two Shcottky diodes (HSMS 2860) are used in the rectifying circuit that provide full wave configuration to generate DC voltage. Measurement experiment had been done by using several antennas as the transmitter and rectenna as the receiver to measure output voltage at different power transmit and load. Based on the experimental result, the maximum output voltage produce at the receiver is 2.112V for load 820kΩ and input power, 20dBm by horn antenna. This rectenna can replace power source such as battery to activate either RFID or wireless sensor. Besides, it can use to power up small electronic device such as LED and buzzer. This project is successfully proved that microwave signal can be converted to DC power by using rectenna and new energy could be harvested.

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