Bandwidth enhancement and size reduction of period for dual-band loop-slot Frequency Selective Surfaces on plastic board

Dual-band FSSs on plastic board that transmit 1.5GHz and 5.8GHz are developed and are evaluated by HFSS analysis and measurement. As for the close arrangement of inner elements in FSS, broad bandwidth is observed at higher resonant frequency than the other FSSs. The period of the FSS can be smaller by using fractal structure. Measurement system is developed and its validity is confirmed by comparison of simulation with measurement. The bandwidth and resonant frequencies of FSS are confirmed by the system.