A novel multilayer multiband frequency selective surface for IMT advanced 4G mobile phone service and airborne radar systems

In this paper, a novel two-layered low profile multiband frequency selective surface (FSS) design was performed. Two independent FR4 dielectric layers were used in the design, with a thickness of 1 mm, a relative dielectric constant of 4.54, and a loss tangent of 0.02. The proposed FSS unit cell consists of a square frame, dodecagonal rings and upright bars. The FSS is designed for preventing harmful effects to human health from electromagnetic waves in the 800, 900, 1800, 2100, 2600 MHz frequency bands, used for IMT Advanced mobile phone and internet access service global system for mobile communication (GSM), is also designed for the Department of Defense (DoD) ground-based, high-powered shipborne and airborne radar systems 3500-3650 MHz frequency bands, which is known as US245 at United States Federal Table and to prevent interference effects in these frequency bands. The proposed FSS has a very compact size with a cell size of 0.17λ and therefore has a low sensitivity to the angle of incident wave. ANSYS high-frequency structure simulator (HFSS) software was used for verification of the design.