Reconfigurable shield by active frequency selective surface for LTE2.1GHz and WiFi2.45GHz

Two novel active frequency selective surfaces (AFSS) are proposed in this paper. Long Term Evolution (LTE)-AFSS and WiFi-AFSS are made up of square loop patch and half circular loop patch for shielding 2.1GHz and 2.45GHz signals respectively. PIN diodes inside AFSSs are used to realize the switching between transmission and reflection characteristics. In addition, both AFSSs have large holes for the purpose of ventilation and heat dissipation. Equivalent circuit model (ECM) and resonance theory analysis are provided to validate the simulation. The detailed results of different incident wave angles(0°/30°/60°) are also given in this paper.