Estudo de desempenho de antenas para cobertura de WI-FI em ambientes fechados

Abstract

Since the history beginning, communication has been essential to meet human needs. With the emergence of the internet, and later wireless communications, the way of communicating evolved to the point of always allowing connections and practically everywhere. Among the technologies that allow this context to be real, Wi-Fi connections stand out. Features such as power, network speed, latency, range, and choice of antennas have great relevance in a good dimensioning of the network. The present work refers to the performance study of three antennas commonly used for Wi-Fi coverage indoors operating at 2.4 GHz frequencies., being Monopole, Helical and IFA. In each of them, the input impedance parameters were analyzed, bandwidth, irradiation diagrams and gain values. For this, the studies were carried out in the ANSYS HFSS simulator (High Frequency Structural Simulator) from simulations based on the finite element method. The Monopolo antenna had the highest bandwidth (36.66%), gain (4.04), type of radiation (almost omnidirectional) and volume (0.0004 m³). For the Helicoidal antenna, bandwidth (3.78%), gain (1.82), type of irradiation (omnidirectional) and volume (0.00005 m³) were observed. As for the IFA antenna, the results obtained were bandwidth (11.34%), gain (4.04), type of irradiation (non-omnidirectional) and volume (0.000008 m³).