A compact polarization-independent Dual-Band Frequency Selective Surface for smart phone safety Application

Abstract

This paper consists of a compact polarization-independent dual-band pass Frequency Selective Surface (FSS) for smart phone safety application. The FSS structure is entrenched in FR-4 substrate, which acts as a band pass filter for a frequency of 2.4 GHz and 5 GHz. These two pass band frequencies are independently controlled by tuning the unit cell geometrical parameters. The unit cell shows a symmetrical shape to enable constant performance in both TE and TM mode. By considering different angles (0°- 60°) for the incidence of waves and the angular stability is verified. The proposed unit cell structure is developed with the help of CST microwave studio. The performance of the proposed FSS were validated with the help of simulated and measured results. In reflection mode analysis, the specific frequency is passed and the remaining frequencies received at the receiving end are attenuated near to 30 dB. The accurate results are obtained at 2.25 GHz and 4.77 GHz.