Frequency Selective Surface Based Rasorber with T-A Response

Abstract

A brand-new switchable rasorber/absorber with double polarization is suggested. An air gap separates two FR-4 substrates in the dual-substrate design that is shown. The bottom substrate contains a copper metal layer with a slot cutout that allows for a filter response, while the top substrate has a plus-shaped copper design. The top substrate's plus-shaped absorber demonstrates an absorption response, creating a composite structure with absorption and filtering characteristics. This design achieves a distinct frequency response by utilizing the complementary effects of the slot-coupled resonator and the metal-insulator-metal (MIM) arrangement. This design is switchable since it makes use of P-i-n diodes. Radome, radar, and wireless communication all make use of this concept.