Diseño de una rectena de 5ghz para dispositivos IoT mediante geometría fractal

Abstract

IoT devices use 5 GHz wireless networks that, due to their speed and bandwidth, generate high energy consumption, where current sources are not sufficient, or in other cases, batteries are used, which need to be recharged to maintain their operation. . On the other hand, despite this problem, the surplus electromagnetic energy can be used to supply the IoT device. In this paper, an alternative of power supplies for IoT devices is designed. In addition, the design of a microstrip rectenna with fractal geometry is contemplated, capturing RF energy at 5 GHz, using the T-type slot method, in addition, a stable rectifier is designed to power the IoT device. S and VSWR parameters for the antenna and rectifier, the radiation pattern in receive mode are analyzed. Obtaining a DC voltage of 4.525 V and a current of 4.525 mA for a resistive load of 1 KΩ. The rectenna design with fractal geometry allows to obtain a passive device avoiding external sources to function, working at a frequency of 5 GHz, the fractal antenna in relation to the standard microstrip antenna has an efficiency of 84.01%, the final rectenna design is effective at 90.5%.