Portable Electromagnetic Energy Harvesting System

The present article exposes the results of the implementation of a portable electronic system for the electrical recharge of mobile devices, by capturing the Electromagnetic Energy available in the environment. The system consists of an array of flat antennas, which capture the electromagnetic waves of Wi-Fi, Mobile Telephony, and International Mobile Communications, transforming them to high frequency electric power, and then using a Villard voltage multiplier, the voltage is amplified and rectified, to be stored in rechargeable batteries and finally its application in the electric recharge of mobile devices. It was performed tests in different environments: park, urban street, shopping center, rural area and inside the home, without the use of a storage component. It had as results output voltage values ranging from 4.2 mV to 177.6 mV. In addition, the system had tests with two different storages: the first, was a capacitor, and the second, was two rechargeable batteries, during 30 and 60 min of charging time, respectively. The results showed that the capacitor stored energy properly at all cases, while the batteries presented load drawbacks in environments where the concentration of Electromagnetic Energy is low. Finally, the system continuously supplied electrical power to a mobile phone for a maximum of 1 h and 24 min time. So, the present work is a promise approach to provide Clean Energy with the intention of offering support in the Smart Cities construction.