Diseño de una rectena para recolección de energía electromagnética a 2.4ghz

Abstract

An alternative to power supplies for wireless IoT sensors with energy harvesting is presented as their operation is currently limited to the use of batteries. Several studies in previous years indicate that radio frequency energy harvesting is easily obtained from an access point due to its availability and abundance. In this work, a 2.4 GHz rectenna is designed and simulated using ANSYS software for the antenna and ADS software for the rectifier circuit. The rectenna is composed of a simulated microstrip patch antenna in which S, VSWR, radiation pattern and Z-terminal parameters are analyzed. This was connected to an impedance coupling network, where the S and VSWR parameters were verified to ensure maximum power transfer in the circuit and obtain a DC signal output with 13 mA current and 3,087 V at a power of 15 dBm capable of feeding the PIR (Passive Infra-Red) motion sensor of the Panasonic brand used in IoT. For the rectifier circuit it is also possible to determine the number of stages of Dickson voltage multipliers considering certain important factors such as the power range with which it will work and thus obtain the output voltage and current to power the PIR sensor.