Reconfigurable Absorptive Frequency-Selective Reflection Structure Based on Magnetic Material

When it comes to the realization of RCS reduction, absorptive frequency-selective reflection structure (AFSR) integrated with antenna is effective at building a low-RCS antenna system. In this article, a reconfigurable AFSR using magnetic material is proposed and investigated, which is comprised of a reconfigurable frequency selective surface (FSS) and a frequency-dependent magnetic material (FDMM). The total 11.2 mm thick reconfigurable AFSR realizes switches between broadband absorption from 5 to 8 GHz with -10 dB reflectivity and in-band reflection & out-of-band absorption modes by controlling the ON and OFF states of pin diodes. The proposed structure is simulated and analyzed, where reasonable agreements between these results are observed.