Arranjos de antenas reconfiguráveis e controlados mecanicamente para redes celulares 5G

Abstract

This work is focused on the development of reconfigurable antenna arrays for the future fifth generation of mobile communication networks (5G), operating at millimeter waves (mm-waves). We propose the use of slotted-waveguide antenna arrays (SWAAs) for dynamic wireless coverage based on two different approaches: 13-dBi gain omnidirectional coverage; beam steering capability through mechanical reconfiguration. The omnidirectional coverage has been achieved with the development of the antenna array called SWAA_Twisted, whereas the beam steering capability has been ensured by using SWAA_Jacket and SWAA_Bars arrays. The antenna development has been divided in four phases: analytical design; numerical simulations; prototype manufacturing and characterization; implementation at Inatel campus. The numerical simulations have been conducted using the piece of software ANSYS HFSS and experiments have been carried out at the Lab. WOCA (Wireless and Optical Convergent Access) from Inatel. Experimental results demonstrate operational bandwidth up to 2 GHz and gain from 11 to 17 dBi. Additionally, the implementation of one of the proposed antenna arrays enabled a non-line-of-sight indoor coverage operating in the 24 GHz band, which is considered potential for 5G networks, with error vector magnitude (EVM%) below 12% over 40% of the wireless coverage area.