| Abstract [eng] |
The main purpose of this work is to accumulate knowledge on radio frequency energy harvester system components and, using that knowledge, design, manufacture, and investigate a radio frequency energy harvesting system that can harvest radio wave energy at WiFi 2.4 GHz frequency. The work is divided into the following sections: scientific literature analysis, system component analysis, and measurements. Literature analysis reveals the feasibility of harvesting energy from different radio sources, using different types of antennas, low power voltage rectifier topologies, and diodes used in them. The importance of different impedance matching network topologies, and energy storage system functions is also disclosed. After literature analysis, two chosen antennas and voltage rectifiers are simulated and analysed using CST and ADS software. Finally, in third section, system components manufacturing, and measurement results are presented. The main result of this study is that manufactured radio frequency energy harvesting system could periodically power an LED diode when collecting energy from a 200 mW source 1 m away. Also it is discovered that a one-diode voltage rectifier is more efficient in AC/DC conversion when input power is low (<-15 dBm). Indoor radio energy harvesting systems such as this someday will replace batteries in low-power electronic devices and sensors, reducing environmental pollution associated with battery manufacturing. |
