Fig. 1. Unit cell structure of the proposed FSS absorber

Fig. 2. Design evolution of the FSS structure

Fig. 3. Comparison of performance for FSS 1, FSS 2 and FSS 3 structures

Fig. 4. Comparison between the performance of FSS 3, FSS 4 and FSS 5 structures

Fig. 5. Equivalent circuit model and comparison to full wave simulation

Fig. 6. Full-wave simulated results under normal incidence

Fig. 7. Angular stability of the absorber for different polarization

Fig. 8. Experimental system and the proposed prototypes

Fig. 9. Comparison of absorption between measurement and simulation