FSS based Hexo-Fractal Dual Passband Filter for 28 and 380Hz 5G Millimeter-Wave Communications

This paper presents a dual passband frequency selective surface for future 5G communications. The FSS has two ring slots with hexagonal shape, one of which has been applied with a fractal generator. The FSS unit cell is 3.7×3.7mm
²
. The pass band ranges are 27.639 - 28.997 GHz and 37.442 - 41.452 GHz, covering both 28 and 38 GHz 5G bands. The FSS has been modelled using very thin 0.127 mm flexible Rogers substrate. The dual band response, low cost and unique design makes this FSS suitable for EMI shielding as well as radome applications for future 5G and millimeter-wave communication systems.