Análise paramétrica e projeto de superfícies seletivas em frequência para aplicações na banda n78 do 5G

Abstract

This work presents a parametric analysis and the design of Frequency Selective Sur- faces (FSS) aimed at operation in the n78 band (3300 to 3800 MHz) of 5G telecom- munications networks. The main objective of this study is to evaluate how variations in the geometric parameters of different metallic scatterers and the properties of dielectric substrates influence the performance and electromagnetic response of these structures. To circumvent the high computational cost of full-wave simulations during the synthesis phase, an iterative analytical simulator named "FSS Explorer"was developed, based on the Equivalent Circuit Model (ECM). Through this software, two distinct topologies of band-stop elements were analyzed and optimized: Square Loop and Jerusalem Cross, aiming to tune the fundamental resonance frequency to 3.55 GHz over various commercial laminates. The design validation was performed through cross-comparison of the analytical data with rigorous simulations in the Ansys HFSS software. The results attest to the excellent predictive accuracy of the analytical equations in determining the center frequency, especially in elementary geometries such as the Square Loop, consolidating the co-simulation methodology and the developed tool as highly efficient instruments for reducing the time and computational effort in the pre-design of spatial filters for 5G.