4th-EAW-ICASEAT2024 - Comparison of Frequency Selective Surface (FSS) Filter Performance Between Square and Hexagon Shape for GPS Jamming Application

Abstract

Intentionally disrupting electromagnetic signals, known as jamming, is a major risk to communication and navigation systems, especially in the case of Unmanned Aerial Vehicles (UAVs). This study examines the effectiveness of Frequency Selective Surface (FSS) filters in reducing jamming interference by comparing square and hexagon shaped FSS arrangements. The effectiveness of FSS filters require to achieve by reducing a 1.6 GHz jamming signal while maintaining continuous communication signals at 2.4 GHz between UAVs and remote stations. Both square and hexagonal shapes is compared where components are oriented at 90-degree angles in both rows and columns, diverging from the conventional 45-degree adjacency pattern. FSS structures is analysed at 2.4 GHz using Ansys HFSS software to attenuation at 1.6 GHz. The main results show that the square loop FSS has better attenuation performance, reaching -0.4 dB at 1.6 GHz and -49.0 dB (simulated) at 2.4 GHz, compared to the hexagon loop FSS. This study highlights the capability of FSS filters to effectively combat jamming threats in GPS systems, with potential benefits for improving communication security in national defence and civilian industries.